What controls the force of cardiac muscle contraction?

Answers

Answer 1

The force of cardiac muscle contraction is controlled by the autonomic nervous system.

What controlled the force of cardiac muscle contraction?

The force of cardiac muscle contraction is controlled by the autonomic nervous system, specifically by the sympathetic and parasympathetic branches. The sympathetic nervous system increases the force of contraction by releasing the neurotransmitter norepinephrine, which activates beta-adrenergic receptors on the surface of cardiac muscle cells.

This leads to an increase in intracellular calcium levels, which in turn increases the force of contraction. The parasympathetic nervous system, on the other hand, decreases the force of contraction by releasing the neurotransmitter acetylcholine, which activates muscarinic receptors on the surface of cardiac muscle cells.

This leads to a decrease in intracellular calcium levels, which in turn decreases the force of contraction. Additionally, the force of cardiac muscle contraction is also influenced by factors such as heart rate, preload (the amount of stretch on the heart muscle before it contracts), and afterload (the force the heart must generate to eject blood against resistance).

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Related Questions

If, during the second analysis, the AED prompts "no shock advised," you should:

Answers

If, during the second analysis, the AED prompts "no shock advised," you should continue to perform CPR and follow the AED's voice prompts for further instructions. It is important to continue monitoring the person's vital signs and providing appropriate care until emergency medical services arrive.


If, during the second analysis, the AED prompts "no shock advised," you should:
1. Confirm that the AED has analyzed the patient's heart rhythm correctly and prompts "no shock advised."
2. Ensure the scene is still safe, and you have your protective gear on.
3. Resume CPR immediately, starting with chest compressions.
4. Continue CPR for the next cycle of 2 minutes, then pause to allow the AED to analyze the patient's heart rhythm again.
5. Follow the AED's prompts for further actions, such as continuing CPR or delivering a shock if needed.

Remember to maintain a calm and professional demeanor while providing care to the patient.

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Which of the following muscles is not part of the quadriceps femoris group? A. rectus femoris. B. biceps femoris. C. vastus medialis. D. vastus lateralis. E.

Answers

Biceps femoris is not part of the quadriceps femoris group.(B)

The quadriceps femoris group is a set of four muscles located in the front of the thigh that work together to extend the knee joint. These muscles are the rectus femoris, vastus medialis, vastus lateralis, and vastus intermedius.

The rectus femoris is the most superficial muscle in the group and also functions as a hip flexor. The vastus medialis and vastus lateralis are located on the inner and outer sides of the thigh, respectively. The vastus intermedius lies deep to the rectus femoris.

The biceps femoris is a muscle located on the back of the thigh and is part of the hamstring muscle group, which is responsible for flexing the knee joint and extending the hip joint.

It is important to distinguish between these muscle groups, as they have different functions and may be affected by different injuries or conditions. For example, a tear in the quadriceps muscle group is more common in older individuals, while a hamstring strain is more common in athletes.(B)

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Blood vessels (capillaries) that selectively let certain substances enter brain tissue and keep others out.

-
Type of glial (neuroglial) cell that transports water and salts from capillaries.

-
Collection of spinal nerves below the end of the spinal cord.

A.
Neurotransmitter chemical released at the ends of nerve cells.

-
Microscopic fiber that carries the nervous impulse along a nerve cell.

-
Carries messages toward the brain and spinal cord from receptors.

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Lower portion of the brain that connects the cerebrum with the spinal cord.

-
Part of a nerve cell that contains the nucleus.

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Middle layer of the meninges.

-
Contains nerves that control involuntary body functions or muscles, glands, and internal organs.
A. Acetylcholine
B. afferent nerve
C. arachnoid membrane
D. astrocyte
E. autonomic nervous system
F. axon
G. blood-brain barrier
H. brainstem
I. cauda equina
J. cell body

Answers

A would be your answer hope this helped

The blood vessels control entry into the brain is blood-brain barrier (G), the glial cell is the astrocyte (D), the collection of spinal nerves is cauda equina (I), Neurotransmitter is Acetylcholine (A), Microscopic fiber is axon (F), carries messages on an afferent nerve (B), connects the cerebrum and brainstem (H), is part of a nerve cell body (J), middle layer is the arachnoid membrane (C), and controls the involuntary body is the autonomic nervous system (E).

What is the blood brain barrier?

This is a specialized system of blood vessels that helps to protect the brain by selectively allowing certain substances, such as oxygen and nutrients, to enter while keeping others, such as toxins and pathogens, out, and the blood-brain barrier is made up of tightly packed cells and specialized transport proteins that control what can pass from the bloodstream into the brain tissue.

Hence, blood vessels control entry into the brain is blood-brain barrier (G), the type of glial cell is the astrocyte (D), the collection of spinal nerves is the cauda equina (I), Neurotransmitter is Acetylcholine (A), Microscopic fiber is an axon (F), carries messages on an afferent nerve (B), connects the cerebrum and brainstem (H), is part of a nerve cell body (J), middle layer is the arachnoid membrane (C), and controls the involuntary body is the autonomic nervous system (E).

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A patient is to take 4 g of amoxicillin prior to dental work. If the pharmacy carries 200 mg capsules, how many will the patient take?

Answers

Answer:

Explanation:

200mg x 5 tabs = 1000mg or 1 gram

need need 20 pills   1 gram = 5 tabs

5 tabs x 4  =20 tabs

Asess how personal lifestyle plan could assist you to experience quality of life during periods of change, by discussing the following components of such a plan
*Diet and nutrition
*Relationship with friends and family
*Recreation and relaxation

Answers

A personal lifestyle plan can assist an individual in experiencing a better quality of life during periods of change. One important component of such a plan is diet and nutrition. option a is correct.

Eating a balanced and healthy diet can provide the necessary nutrients for the body to function optimally, leading to improved physical and mental health.

Another component of the plan is maintaining a positive relationship with friends and family. Social support can help an individual to cope with stress and provide emotional support during difficult times.

Recreation and relaxation are also important aspects of the plan. Engaging in activities that promote relaxation, such as meditation or yoga, can help reduce stress and promote overall well-being. Participating in recreational activities that are enjoyable can provide a sense of accomplishment and improve mood.

By incorporating these components into a personal lifestyle plan, an individual can improve their quality of life and better cope with periods of change.

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Select the correct sign(s) and symptom(s) of an anaphylaxis. * Hypotension Respiratory Problems Gastro-intestinal Symptoms Urticaria/Angioedema None of the above

Answers

Answer:

Hypotension, Respiratory Problems, Gastrointestinal Symptoms, and Urticaria/Angioedema.

Explanation:

Anaphylaxis is a severe allergic reaction that can cause death. The main symptoms are congestion, sneezing, and urticaria. Severe anaphylactic shocks, where the person is at risk of dying, present the following symptoms: are respiratory problems such as bronchial constriction, which makes it hard to breathe, gastrointestinal symptoms like bloating, nausea, diarrhea and abdominal pain, and hypotension due to the cardiovascular problems and vascular collapses. In severe cases, the administration of epinephrine is crucial for a person's survival.

HURRY
Which trait gained during childhood will help a young adult succeed?
A child’s increase in fine motor skills will allow for lasting friendships in adulthood.
A child’s sense of right and wrong will allow for a stronger memory in adulthood.
A child’s increase in gross motor skill will allow for vision acuity in adulthood.
A child’s decrease in dependency on his parents will allow for greater independence in adulthood.

Answers

Answer: B

A child's sence of rights and wrong will allow for a stronger memory in adulthood.

Answer:

the last one A child’s decrease in dependency on his parents will allow for greater independence in adulthood.

Explanation:

Cause and effect if a child is lease dependent on their parents, that will allow for more things without their parents like money.

Growth hormone is administered to people who have pituitary dwarfism. Parents wanting their normal children to be taller have requested the treatment for them. Do you think this is a wise request? Why or why not? Using 300 to 500 words post your thoughts about this. Please include at least two scholarly references. Reply to at least two other students' posts using approximately 100 words.

Answers

I provided a guide on how to go about writing your essay.

Explanation:

To begin, kindly review relevant literature that relates to the subject to the subject. For example, at least two more articles that discuss growth hormone administration in children with pituitary dwarfism can carefully read.

Next, form conclusions based on the evidence provided from the review of previously published work. Your conclusion should be written in your own words, while also making proper reference citations of authors in other avoid being held for plagiarism.

Ensure the main points are stated taking into account the word limit requirement of  300 to 500 words.

Which nervous system includes the spinal cord? A. Somatic B. Central C. Sympathetic D. Autonomic

Answers

Answer:

B

Explanation:

The spinal cord is part of the central nervous system.

A client suffers hypoxia and a resultant increase in deoxygenated hemoglobin in the blood. What are the best sites to assess this condition

Answers

Hypoxia is a condition in which there is an inadequate supply of oxygen to the body's cells and tissues. When a client suffers from hypoxia, there is a resultant increase in deoxygenated hemoglobin in the blood. Assessing the condition requires the use of the pulse oximetry test, capnography, arterial blood gas (ABG) testing, and the vital signs test.

Pulse oximetry is a non-invasive test that involves attaching a probe to the client's finger or earlobe to measure the amount of oxygen in the blood. A normal oxygen saturation level should be between 95% to 100%. A lower percentage indicates that the client is suffering from hypoxia. Capnography, on the other hand, is a test that measures the amount of carbon dioxide in the client's breath. An increase in carbon dioxide levels indicates that there is a low level of oxygen in the blood.

Arterial blood gas (ABG) testing involves drawing blood from the client's artery and measuring the oxygen and carbon dioxide levels in the blood. A decrease in oxygen levels and an increase in carbon dioxide levels indicate hypoxia.The vital signs test involves measuring the client's blood pressure, heart rate, respiratory rate, and temperature. An increase in the heart rate, respiratory rate, and blood pressure, and a decrease in the temperature, indicate that the client is suffering from hypoxia.

Therefore, to assess hypoxia, the best sites to use are the pulse oximetry test, capnography, arterial blood gas (ABG) testing, and vital signs test.

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A state requires additional address information beyond the physical and mailing address

Answers

If a state requires additional address information beyond the physical and mailing address, it is important to find out what specific information they are requesting.

What are some possible additional address information?

Some possible additional address information that a state may require could include:

County: In some states, it may be necessary to provide the county where the address is located.

Zip code: While zip codes are typically included as part of the mailing address, some states may require them to be provided separately.

Apartment or unit number: If the address is an apartment or unit within a larger building, the state may require this information to be provided.

Floor or suite number: Similar to the apartment or unit number, the state may require information about the specific floor or suite within a building.

It is important to carefully review the state's requirements and provide all requested information accurately and completely. Failing to do so could result in delays or errors in processing the request.

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when you _________, air enters the body

Answers

Answer:

Inhale would be the most fitting answer

Explanation:

Air enters the body through the mouth or nose and quickly moves to the pharynx, or throat. From there, it passes through the larynx, or voice box, and enters the trachea. The trachea is a strong tube that contains rings of cartilage that prevent it from collapsing.

Fact or Fiction? (Please help me)

________ 1. The French established the first hospitals when physicians care for soldiers and ill people in their homes.

Answers

Fiction, The Romans did

A person suffering from carpal tunnel syndrome has lost function of the median nerve. radial nerve. musculocutaneous nerve. ulnar nerve. axillary nerve.

Answers

Answer:

median nerve

Explanation:

Answer: median nerve

which of these activities will most likely impose a negative externality?group of answer choicesbetty plants flowers in her garden.bonnie gets a flu vaccine.bridget drives her car after having too much alcohol to drink.becky buys a new flat screen television.

Answers

3) Bridget operates her vehicle after consuming too important alcohol is negative externality.

When a good or service has an adverse effect on a third party unconnected to the sale, it's said to have a negative externality. A typical sale has two parties, the first and alternate parties in the sale being the consumer and the patron. A third party is any other party that's unconnected to the sale.

An externality is a cost or profit a patron generates but doesn't bear or admit. An externality can moreover, effect us from the consumption of a good or service and can be both positive and negative. While, as you know that both private( to an individual or an organisation) and societal( affecting society as a whole) costs and benefits are possible.

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A 59-year-old inpatient presents for low velocity high amplitude for osteopathic treatment of the pelvis. What is the root operation? What is the ICD-10-PCS?


THIS IS NOT MY WORK

A 59-year-old inpatient presents for low velocity high amplitude for osteopathic treatment of the pelvis.

Answers

Answer:

• Root operation: The root operation for this case is "manipulation," which involves moving a body part to a new position or location without cutting or joining any body parts. In this case, the osteopathic treatment of the pelvis involves the manual manipulation of the bones and joints to improve their function.

• ICD-10-PCS code: The appropriate ICD-10-PCS code for this case would be 0SRD0ZZ, which represents the root operation of manipulation on the pelvis. The 0S qualifier indicates that the procedure is performed on the musculoskeletal system, while the RD character indicates the specific body part involved (pelvis). The final two characters (ZZ) are reserved for the device value, which is not applicable in this case.

• Reasoning for code selection: The root operation of "manipulation" accurately describes the procedure being performed, and the 0SRD0ZZ code accurately reflects the specific body part and procedure involved in this case. The ICD-10-PCS system is designed to provide a standardized method for describing medical procedures, and the use of these codes helps ensure accurate and consistent reporting of healthcare services across different providers and facilities.

what action used to clean or remove gross debris from surgical instruments in the ultrasonic cleaner

Answers

the action is called sterilizing

Grady has an inflamed knee from doing a lot of physical exercise the day before. He stops by the pharmacy to find a drug to relieve the inflammation and asks the pharmacist to recommend a drug. The pharmacist asks Grady if he has a history of peptic ulcers. Which best describes why the pharmacist needs to know this?

A peptic ulcer could result in a drug-disease interaction by taking beta blockers, a common anti-inflammatory medication.
A peptic ulcer could result in a drug-drug interaction by taking aspirin, a common anti-inflammatory medication.
A peptic ulcer could result in a drug-disease interaction by taking aspirin, a common anti-inflammatory medication.
A peptic ulcer could result in a drug-drug interaction by taking beta blockers, a common anti-inflammatory medication.

Answers

Answer: So the pharmacist can prescribe him something that won't upset the stomach acids in his stomach the causes the ulcers

Explanation:

Answer: A peptic ulcer could result in a drug-disease interaction by taking beta blockers, a common anti-inflammatory medication

Explanation: I have a peptic ulcer

A study, reported in The Lancet, presented research linking arterial inflammation to stress (Tawakol et at. 2017)*. What do you hypothesize this would do to a person’s resting diastolic blood pressure? Why? Does the HCPS study support this finding?

Answers

Answer:

In this first study to link regional brain activity to subsequent cardiovascular disease, amygdalar activity independently and robustly predicted cardiovascular disease events. Amygdalar activity is involved partly via a path that includes increased bone-marrow activity and arterial inflammation.

Explanation:

A stage of sleep characterized by almost pure delta waves, and our most restful sleep...
A. Stage I
B. Stage III
C. Stage IV
D. Stage V (REM)

Answers

Answer:

Stage III

Explanation:

Not stage 1, as you can wake up easily once you enter it

Not stage 2, as you're preparing for deep sleep

Stage 3, this is your deep sleep, your body repairs tissues at this stage

Not Rem, as rem fastens your heartbeat, you're brain is also very active in the rem stage

A(n) __________ scan maps brain activity over time.
A.
EEG
B.
CT
C.
MRI
D.
PET

Answers

Answer:

D. PET is the correct answer

Explanation:

Hope this helps and if it does please mark me the brainliest!

Peace and Love

Answer:

D) PET is the correct answer

Explanation:

edge 2023

1. There's a cure for lung cancer; about 85% of lung cancer patients get better within 5 years.

True
False

Answers

Answer:

False.

Explanation:

The statement is not accurate. While advances in treatments have improved the prognosis for some lung cancer patients, the cure rate for lung cancer is not as high as 85%. In fact, the 5-year survival rate for lung cancer is only about 18%. This emphasizes the importance of early detection and prompt treatment for lung cancer.

The answer is false. There is no cure for cancer, only treatments and surgeries…

15. Order: oxacillin sodium 0.25 g p.o.q.8h
Supply: oxacillin sodium oral suspension 125 mg per 2.5 mL
Give:____ t

Answers

Explanation:

To determine the number of teaspoons (t) needed for the prescription, we need to calculate the dosage conversion from grams to milligrams and then to teaspoons.

Given:

- Oxacillin sodium oral suspension: 125 mg per 2.5 mL

First, let's convert the dosage from grams to milligrams:

0.25 g = 250 mg

Now, let's find out how many milliliters (mL) are needed for the prescription:

250 mg = 2.5 mL

Since the prescription calls for 2.5 mL of the suspension, we can now determine the number of teaspoons needed.

1 teaspoon (t) is approximately equal to 5 mL.

Therefore, the calculation is as follows:

2.5 mL ÷ 5 mL/t = 0.5 t

So, the prescription requires 0.5 teaspoons (t) of oxacillin sodium oral suspension.

Collection guidelines are best communicated to the patient through

Answers

Explanation:

Physicians may consider five steps for effective patient-centered interviewing as shown in Table 1 10. The following four qualities are important components of caring, effective communication skills: 1) comfort, 2) acceptance, 3) responsiveness, and 4) empathy 11.

You are assessing a 25-year-old woman who is 39 weeks pregnant. She is experiencing regular contractions that are approximately 3 minutes apart and states that her amniotic sac broke 2 hours ago. After taking the standard precautions, you should:

Answers

Take an advil or melatonin or anything that helps relieve the pain

Which of the following is NOT an element of progression?
A.
type
B.
duration
C.
exertion
D.
strength

Answers

Answer:

d. strength

Hope it helped u

D. Strength, is not an element of progression

What is the breakdown of sugar in the body for energy called

Answers

Cellular respiration

2. Explain why aldosterone has a shorter half-life than cortisol.

Answers

Answer:

The rates of metabolic destruction, and thus the periods of their persistence in the body may also be changed. Aldosterone thus has a much shorter half-life in the body than cortisol and corticosterone and this property may reflect its more acute and sensitive short-term effects.

Explanation:

Aldosterone degrades more quickly than cortisol because it interacts to plasma proteins less strongly. When released, cortisol is attached to a protein (transcortin and albumin).

What are mineralocorticoids?

Mineralocorticoids belong to the corticosteroids chemical class. Corticosteroids, in turn, belong to the steroid hormones chemical class. Mineralocorticoids are hormones that are produced in the adrenal cortex and have an effect on how the body regulates its salt and water levels. Aldosterone is considered to be the major mineralocorticoid.

The biological half-life of cortisone and cortisol is less than 12 hours, making them short-acting and rarely used. With a biological half-life of 18 to 36 hours, the steroids prednisone, prednisolone, methylprednisolone, and triamcinolone are intermediate-acting.

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ECOTOXICOLOGY
(e) State important aspects of allometry in dose-response relationship [4 marks]

Answers

Allometry in the dose-response relationship is a crucial aspect that considers the scaling, species variations, extrapolation, and safety assessment of the response to a chemical or drug.

It recognizes the differences in body size or weight among organisms and examines how these variations influence the dose-response relationship.

By understanding the scaling relationship, allometry enables the appropriate dose adjustments for different species or individuals. It takes into account species-specific differences in metabolism and physiology, allowing for the extrapolation of data between species or from animal models to humans. Moreover, allometry plays a vital role in safety assessment by establishing safe exposure levels that minimize adverse effects while maximizing therapeutic benefits. It helps ensure accurate and reliable predictions of the response to chemicals or drugs, promoting effective and safe use in various populations.

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effects of paracetamol on enzymes involved in the pain

Answers

Answer:

vomiting,possibly blood in vomit,muscle spasms,

Explanation:

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The highest peak in North America, Mt. McKinley (or Denali), is located in the state of __________. A. Nevada B. Washington C. Colorado D. Alaska Please select the best answer from the choices provided. A B C D find the length of a cube with a volume of 8/729in3 Find the area of the figure. In IJK, the measure of K=90, JI = 53, IK = 45, and KJ = 28. What ratiorepresents the sine of I? Anyone get this please help me, can you do it step by step please Question 1 of 5Which research question is most effective?A. In what environment do people of all ages learn best?B. When was the middle school in our city built?C. Should our city build a new middle school?D. How old are middle schools across the country?SUBMIT Based on The Myth of the War of the Worlds Panic, what can readers determine about the survey conducted the night Welless broadcast aired? Suppose that the actual money multiplier equals the maximum potential money multiplier. If the reserve ratio is 10 percent, in order for the banking system to increase deposits by $2.5 million, the Fed must Identify the countries on the map that made up the Axis Powers during World War II.Alliances of World War II where is Italy and Germany Tipton Manufacturing is based in Lexington, Kentucky. The company does not make the gears it uses in its products, it purchases them from a supplier in Hong Kong. Tipton Manufacturing is practicing As captain of the cheer team Lily is choreographing a routine for a competition. The minimum allowable length for a routine is 3 minutes and the maximum allowable length for a routine is 5 minutes. Write an absolute value for which the two solutions are the minimum and maximum allowable lengths. Given there are six free memory partitions of sizes 100KB, 300KB, 500KB, 550KB, 250KB and 150KB, respectively in that order. These partitions need to be allocated to five processes of sizes 257KB, 310KB, 68KB, 119KB, 23KB in that order. Assume that the search for free partitions starts from the first memory partition. If the NEXT-FIT algorithm is used with DYNAMIC memory allocation approach, list the sizes of free partitions (holes) available after memory allocation to the five given processes. Find the value of the cosine expanded:Kaleb compared the perimeters of twoposters hanging on his bedroom wall.60 cmWhat is the perimeterof the football poster?86 cmWhat is the perimeterof the basketball poster?Which poster has agreater perimeter?catam55 cm Someone please help me, Im doing a final right now, and this question so confusing. An A.P has common difference d.If the sum of of the first twenty terms is twenty five times the first term, find in terms of d, the sum of thirty terms. The half-life of iodine-131 is 13 hours. If a sample of radium-226 has an originalactivity of 400 Bg, what will its activity be after:i) 26 hours?ii) 39 hours?iii) 52 hours Can someone please help me? In eraser tattoo Dante allows shay to give him an eraser tattoo before she leaves do you think this was a good idea ? Which of the following are true regarding the urea cycle?A. Analogous to the citric acid cycle and oxaloacetate, ornithine serves as a regenerated substrate for the next round of urea cycle.B. In humans occurs in cytosol and mitochrondia of liver cellsC. Cabamoyl phosphate is a key molecule because it can capture ammonia.D. Urea contains a carbon from biocarbonate, and two amido groups come from ammonia (ammonium.E. Citrulline (citrullyl-AMP) is a key molecule as it can capture nitrogen via aspartate