a 54-year-old woman is admitted to the emergency room who has been involved in an automobile accident. the person has lost approximately 850 ml of blood. his blood pressure is 50/30 mm hg. which of the following reflex mechanisms is strongly activated? baroreceptor reflex chemoreceptor reflex cns ischemic reflex vasovagal reflex
Answers
One of body's homeostasis systems, baroreceptor reflex(baroreflex), aids in keeping blood pressure almost constant.
Cardiac afferent sympathetic nervous system that is triggered by chemical and mechanical inputs can control baroreceptor responses. Baroreflex sensitivity is determined by the reflex variations in R-R gap in response to generated variations in blood pressure, serves as an indication of mechanical inputs to the sinus node. A quick way to change cardiac output to meet ABP is by Baroreflex regulation of autonomic nervous to the heart. By enhancing parasympathetic activity and lowering sympathetic activity, imposed increases in ABP that are recognized by arterial baroreceptors cause a reflexive drop in heart rate. When blood pressure suddenly rises, the baroreceptors get stretched, and as a result of the increased firing, the vasomotor center inhibits sympathetic drive and raises vagal tone on the heart's SA node.
Learn more about blood
https://brainly.com/question/14781793
#SPJ4
Related Questions
What process synthesizes mRNA from DNA?
Answers
Answer:
transcription
Explanation:
which population in this food web would most likely be negatively affected by an increase in the mouse population?
Answers
Population in this food web that would most likely be negatively affected by an increase in the mouse population is : rabbit.
What do you understand by food web?A food web is a diagram that shows what is eaten by what in an ecological community and how food chains naturally connect to one another. The term "consumer-resource system" can also refer to the food web.
A food web is made up of all the food networks in a particular environment. Each individual organism in an ecosystem is a component of various food chains. Energy and nutrients can travel through the ecosystem along several food chains.
To know more about food web, refer
https://brainly.com/question/746468
#SPJ4
For fruits/vegetables, why do some sugars exist in simple forms and some sugars in complex forms?
Answers
Simple sugars are a type of carbohydrate. Carbohydrates are one of the three basic macronutrients — the other two being protein and fat.
Simple sugars are found naturally in fruits and milk, or they can be produced commercially and added to foods to sweeten, prevent spoilage, or improve structure and texture.
Monosaccharides are the simplest carbs, in that your body cannot break them down further.
This allows your body to absorb them quickly and easily, with the exception of fructose.
There are three types of monosaccharides (1Trusted Source):
Glucose: Fruits and vegetables are natural sources of glucose. It’s also commonly found in syrups, candy, honey, sports drinks, and desserts.
Fructose: The primary natural dietary source of fructose is fruit, which is why fructose is commonly referred to as fruit sugar.
Galactose: The main dietary source of galactose is lactose, the sugar in milk and milk products, such as cheese, butter, and yogurt.
Long term energy, insulation for the body, and cushioning for vital organs, are all functions of which organic molecule?
O carbohydrate
O fat
O protein
O sugar
Answers
Long-term energy, insulation for the body, and cushioning for vital organs, are all functions of which organic molecule is option b. fat.
Fat serves a spread of features including providing a long-time period of energy storage, cushioning vital organs, and insulation for the frame. fats are insoluble in water. Phospholipids are the main thing of cellular membranes.
Fat is the primary lengthy-term power garage molecule of the frame. fats are very compact and lightweight, so they're an efficient manner to store excess electricity. A fat is made from glycerol, which is attached 1 to a few fatty acid chains.
Carbohydrates deliver instantaneous electricity for the frame, and lipids a class of macromolecules provides a lengthy-term strength garage. Lipids, greater commonly referred to as fats, seem in many meals.
Learn more about fat here:-https://brainly.com/question/1601509
#SPJ9
the rate of photosynthesis can be affected by several factors, such as light intensity, temperature ,water, and carbon dioxide. describe how the lack of water in an environment can affect the amount of carbon dioxide absorbed by the plant
Answers
Answer:
Plants need water, so that their guard cells can fill up and become turgid which would allow the stomata to open and gas to exchange. If there is not much water, not much gas exchange can occur hence not much Carbon dioxide can be taken in.
Explanation:
Plants require water for the process of photosynthesis. Plants need water so that their guard cells can fill up and become turgid. This allows the exchange of gases in the stomata.
How does water affect photosynthesis?
During photosynthesis, the plants take in carbon dioxide and water molecules from the air and soil particles. Within the plant cell, this water is oxidized to generate oxygen gas, meaning that it loses electrons, while the carbon dioxide gas is reduced in the chloroplast of the plant cell by gain of electrons to produce carbohydrates. This process transforms the water into oxygen gas and the carbon dioxide gas into glucose molecules (carbohydrates).
Plants need water, so that the guard cells in the plant can fill up and become turgid which would allow the stomata to open and exchange of gases. If there is not much water present in the guard cells, not much gas exchange can occur hence not much of the carbon dioxide can be taken in from the atmosphere.
Learn more about Photosynthesis here:
https://brainly.com/question/29764662
#SPJ2
a wildtype allele and a mutant allele differ by a few nucleotides in the gene sequence for an important protein in neuron metabolism. in an individual who is a heterozygote, both the mutant and the wildtype proteins are synthesized in neurons. at the organismal level, the mutant allele is:
Answers
Wild type and mutant are recessive alleles. The allele that is not expressed when there is heterozygosity. untamed type a person with a typical phenotype.
the trait that is typically present in an organism's natural population. mutant a person who deviates from the typical phenotype in some way. The terms "wild type" and "mutant" refer to people with normal phenotypes shared by the bulk of the natural population, while "mutant" refers to those whose phenotypes deviate from those of the normal population. Melanocytes, a kind of cell, are responsible for producing the protein melanin. Melanin has a crucial role in shielding the skin from the sun's UV rays, which may damage DNA and lead to skin cancer. Albinism is brought on by both alleles of the gene being autosomal recessive. Recessive mutant alleles are those that result in proteins with diminished or nonexistent function.
To know more about mutant on
https://brainly.com/question/28332228
#SPJ4
Both mutant and wild-type alleles are recessive. the allele that is silenced in a heterozygote situation. a person with a characteristic phenotype is the untamed type.
A characteristic that is frequently seen in an organism's natural population. a mutant is a person whose phenotype differs in some manner from the norm. "Wild type" and "mutant" refer to individuals whose phenotypes are similar to those of the majority of the natural population.
"Mutant" describes individuals whose phenotypes differ from those of the normal population. The cell type called melanocytes is in charge of making the melanin protein. Melanin is essential for protecting the skin from UV radiation, which can harm DNA and cause skin cancer.
To know more about mutant Visit: brainly.com/question/28332228
#SPJ4
Can someone explain the 4th dimension to me the best you can?
Answers
Development of Chick Limb Innervation
The muscles of the limbs are innervated by neurons called motor neurons. In the mature vertebrate, the cell bodies of these motor neurons originate in the spinal cord and their axons project to muscle fibers to control movement of the limbs. Development of these connections has been studied in chick embryos. Most of the experiments have been done at the embryonic stage where the spinal cord motor neurons are forming connections with the developing limb buds.
Researchers conducted a series of experiments. The first thing they did was quantify the number of motor neurons in the spinal cord to get a "baseline" measure. Once they had that measure, they did a couple of different manipulations:
a. First, the researchers amputated one of the chick’s limb buds in utero (and let the chick continue developing). Based on what you learned in this chapter, what do you think happened to the number of motor neurons in the spinal cord? Explain your answer using topics/key terms from Ch. 23. (Hint: think about topics like the chemoaffinity hypothesis and trophic interactions).
b. Next, the researchers added an extra limb bud in utero and let the chick continue developing. What do you think happened to the number of motor neurons this time? Once again you should explain your answer using topics/key terms from the chapter.
Answers
a. Amputation of limb buds likely decreases motor neurons due to disrupted chemoaffinity cues and diminished trophic interactions.
b. Addition of limb bud likely increases motor neurons due to enhanced chemoaffinity cues and increased trophic interactions.
a. Amputation of the limb bud in utero would likely lead to a decrease in the number of motor neurons in the spinal cord. This is because the disrupted limb bud would result in the loss of molecular cues necessary for the chemoaffinity-based guidance of motor neurons, potentially leading to apoptosis. The absence of the limb bud would diminish the trophic support provided to the motor neurons, further contributing to their decrease.
b. Adding an extra limb bud in utero would likely result in an increase in the number of motor neurons in the spinal cord. The additional limb bud would introduce new molecular cues, facilitating chemoaffinity-based guidance of motor neurons towards the extra limb bud. This would promote axonal projections and connections with the added limb bud. The presence of the extra limb bud would provide additional trophic support, enhancing the survival and growth of motor neurons, leading to an increase in their number.
To learn more about Amputation follow the link:
https://brainly.com/question/33444188
#SPJ4
Enter the appropriate word or words into each blank to complete the following statements about RNA synthesis. A. DNA sequence that directs binding of RNA polymerase for transcription of a downstream gene is called a B. After transcription of eukaryotic genes, from the new RNA molecule, while together during the process called sequences are removed sequences are stitched c. Mature eukaryotic messenger RNAs (mRNAs) have a 5'- and 3'-end structures known as a , respectively, that are absent from prokaryotic mRNAs. and to D. In addition to using different substrates (rNTPs rather than dNTPs), RNA polymerases differ from DNA polymerases in that they do not require a initiate de novo synthesis of RNA and do not have activity, which is responsible for error correction.
Answers
A. DNA sequence that directs binding of RNA polymerase for transcription of a downstream gene is called a **promoter**.
B. After transcription of eukaryotic genes, **introns** are removed from the new RNA molecule, while **exons** are stitched together during the process called **RNA splicing**.
C. Mature eukaryotic messenger RNAs (mRNAs) have a 5'-**cap** and 3'-**poly-A tail** structures, respectively, that are absent from prokaryotic mRNAs.
D. In addition to using different substrates (rNTPs rather than dNTPs), RNA polymerases differ from DNA polymerases in that they do not require a **primer** to initiate de novo synthesis of RNA and do not have **proofreading** activity, which is responsible for error correction.
Learn more about RNA synthesis and its processes here:
https://brainly.com/question/30336840?referrer=searchResults
#SPJ11
What are the large macromolecules made
up of nucleic acids?
Proteins
Lipids
Polysaccharides
DNA and RNA
Answers
Why? - Nucleic acids, macromolecules made out of units called nucleotides, come in two naturally occurring varieties: deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Why is hail stronger than ice ?
Answers
Answer:
Hail is harder than ice because of the formation, hail is formed in the atmosphere in storm clouds when water droplets collide with supercooled waterdrops in the upper atmosphere in subzero temperatures, instantly turning them to ice in the process. And it keeps building and turning into a sphere shape, and as it gets bigger the harder and more sturdy it gets, making it harder than ice.
The epidermis is a muscle
True
Or
False
Answers
Answer:
false
Explanation:
because derm=skin and skin is not muscle skin is a type of tissue
hope this helped :)
in your own words, explain how hiv/aids damages the immune system
Answers
Answer:HIV attacks a specific type of immune system cell in the body. It's known as the CD4 helper cell or T cell. When HIV destroys this cell, it becomes harder for the body to fight off other infections. When HIV is left untreated, even a minor infection such as a cold can be much more severe.
Explanation:
the wet bulb temperature is 10 C the Dry bulb temperature is 14 C what is the relative humidity?
Answers
The relative humidity is approximately 22.9% based on the given wet bulb temperature of 10°C and dry bulb temperature of 14°C.
Relative humidityWet bulb temperature: 10°C = 50°F
Dry bulb temperature: 14°C = 57.2°F
SVP at wet bulb temperature: 0.284 * \(e^(17.27 * 10 / (10 + 237.3))\)= 0.284 * \(e^(-7.09)\) = 0.284 * 0.000828 = 0.0002356 psi
SVP at dry bulb temperature: 0.284 *\(e^(17.27 * 14 / (14 + 237.3))\) = 0.284 * e^(-5.97) = 0.284 * 0.002562 = 0.0007296 psi
AVP = 0.0002356 - (0.00066 * (57.2 - 50) * 14.7) = 0.0002356 - (0.00066 * 7.2 * 14.7) = 0.0002356 - 0.0686 = 0.000167 psi
RH = (AVP / SVP at dry bulb temperature) * 100
RH = (0.000167 / 0.0007296) * 100 = 0.229 * 100 = 22.9%
Learn more about relative humidity:https://brainly.com/question/30415486
#SPJ1
Euglenas are single-celled organisms. What can you confirm about euglenas from this diagram?
Anatomy of a Euglena consisting of Photoreceptor, Stigma (eyespot), Chloroplast, Nucleus, Cytoplasm, Membrane, Nucleolus, Flagellum, and Contractile vacuole.
A.
They’re exclusively heterotrophs.
B.
They’re capable of photosynthesis.
C.
They make energy solely from fermentation.
D.
They must consume plants to perform cellular respiration.
Answers
They are capable of photosynthesis due to presence of chloroplast. Therefore, option (B) is correct.
What are euglenas?The unicellular creature euglena has a sophisticated internal structure that includes a red "eyespot," a contractile vacuole that has the ability to eject water, and other organelles. Chloroplasts are found in photosynthetic organisms. They have two flagella—one long and one short—each of which may move the creatures.
It is the most researched member of the phylum Euglenophyta/ Euglenozoa and belongs to the Kingdom Protista. It may be discovered in peaceful puddles, ponds, and even swimming pools that contain freshwater. A number of animals have breathing vesicles that keep them from drying up. The Euglena is one of a kind since it is both heterotrophic (meaning it needs to ingest food) and autotrophic (meaning it can live without it) (can make its own food).
Learn more about euglenas, here:
https://brainly.com/question/29510076
#SPJ1
A cladogram is shown below. a) Why is the amoeba considered an outgroup in this cladogram?
b) What trait does a salmon have that an earthworm does not?
c) What does this cladogram tell you about the evolutionary relationship of the traits of jaws and limbs?
d) A squirrel glider is an organism with jaws, limbs, and hair. It does not use a placenta for reproduction. Where do you think this organism would belong in the cladogram?
Answers
a) The amoeba is an outgroup in this cladogram because it is unicellular, while all of the other organisms are multicellular.
b) The salmon has jaws, while the earthworm does not. The animal connected to the trait will have that trait, while the animal(s) to the left does not. The animal(s) to the right also do have that trait, unless it is contradictory (such as a multicellular organism being unable to be unicellular). Since the salmon is connected to the jaws trait, the animal to its left (earthworm) does not have jaws.
c) Not completely sure. Maybe limb traits developed after jaw traits? More animals have jaws than limbs?
d) Between the kangaroo and the cat. It does have hair, so it wouldn't fit to the kangaroo's left. But since the squirrel glider doesn't have a placenta, it could not be in the cat's spot or to the right of the cat. This means that it has to be between the kangaroo and the cat.
TEEHEE
the answer to math is...
Answers
Answer:
THE ANSWER IS TEEHEE
BYE BYE
Explanation:
Answer:T E E H E E
Explanation:
The very top layer of Earth is the crust, which is relatively quite thin when compared to the other layers of Earth. Which of these best describes the
composition of Earth's crust?
A.) Liquid
B.) Metallic
C.) Gaseous
D.) Rocky
Answers
Answer:
D.) Rocky
Explanation:
The crust is the top layer of the Earth which is relatively thin in comparison to other layers. The upper layer of Earth is called lithosphere.
The crust is composed of variety of rocks such as metamorphic, igneous, and sedimentary rocks. Below the crust, is the mantle which is also composed of rocks but also have semi-solid magma.
Hence, the correct answer is "D.) Rocky".
What three final outcomes are possible at a star's death?
Answers
Answer:
explsoin shooting star
Explanation:
Oxygen is present in a what process
Answers
Answer:
redox reaction, photosynthesis
please help!!
Compare and contrast passive transport and active transport. In your answer include:
2 ways they are similar
2 ways they are different
An example of each type of transport
Answers
Answer:
Active transport requires energy as passive transport does not. Active transport requires ATP(energy) b/c it's going against the concentration gradient while passive transport goes with the concentration gradient. Active transport travels from low to high and passive transport travels from high to low.
Explanation:
A trick my teacher told us to help with remembering active transport is by comparing it to a luggage and how when you pack an extremely full luggage it requires a lot of force to shut it b/c you're filling it up, comparing to active transport, it requires ATP and it goes form low to high so imagine the luggage going from empty(low) to full of clothes(high).
What are the characteristics of most unsaturated fatty acids found within a human cell?.
Answers
The characteristics of most unsaturated fatty acids found within a human cell are deprotonated carboxylic acid and cis double bonds.
With the exception of steroids, fatty acids are carboxylic acids that provide the structural foundation of fats, oils, and all other types of lipids. More than 70 have been found in the natural world. They are typically unbranched, contain an even number of carbon atoms (often 12–20), and can be divided into groups based on the existence and quantity of carbon–carbon double bonds. As a result, saturated fatty acids don't have any carbon-to-carbon double bonds, while monounsaturated fatty acids have one, and polyunsaturated fatty acids have two or more.learn more about unsaturated fatty acids here: https://brainly.com/question/3007736
#SPJ4
Write the function of following:-(a) Ovary ; (b) Oviduct; (c) Urus ; (d) Testis; (e) Semen.
Answers
Oviduct—The oviduct, or Fallopian tube in women, is a paired organ that is essential for fertility
Uterus—Uterus, also called womb, an inverted pear-shaped muscular organ of the female reproductive system, located between the bladder and the rectum
Testis—The testes are responsible for making testosterone, the primary male sex hormone, and for producing sperm.
Semen—Semen, also called seminal fluid, fluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female's eggs
4. What is the name of the membrane in blood cells that allows for certain
substances to pass through it, but not others? *
Cell wall.
Semipermeable membrane.
Cell membrane.
plasma membrane
Answers
Answer:
It is Plasma Membranes.
Answer: Plasma membrane
Explanation:
Can I be Brainliest bc i was first
air resistance
Answers
A. the force that accelerates object to earth
B. the general term for the force that one surface exerts on another when they rub against each other.
c. the kind of friction that slows a falling object
d. the state the exists when the force acting on an object is gravity
e. the kind of friction that results when you rub sandpaper on wood.
f. the kind of friction that results when a wheel turns on a surface
g. measure of the force of gravity on a object
h. a falling object reaches this when the force of gravity and air resistance are balanced.
i. the kind of friction that exists between oil and a door hinge.
Answers
Cell organelle
Holds water solutions, provides support to the
cell when full
Answers
Answer:
It is the vacuole - Holds water solutions, provides support to the cell when full
Select the correct answer. If pinecones are placed in water, they close up. But they open up in warm and dry conditions. How do pinecones benefit from this characteristic? choices in pic
Answers
Answer:
B: it protects the seeds from unfavorable conditions
Explanation:
While the pinecone is developing its seeds, it is vulnerable to wet conditions, which can cause rot.
1. The psychological definition of consciousness involves
a. any state that diles not involve unconsciousness.
b. ultradian and infradian rhythms
a waking state in which we are aware of most sensations.
d. awareness of our inner and outer experience
Answers
Answer:
your answer is either C or D but it is most likely d
An object displaces 7.1 ml of water. If the mass of the
object is 4 grams, what is the density?
Answers
Answer: D = 0.56 g/ml
Explanation:
We can use the density equation for this one.
D = m / v
We are given Mass (m) and Volume (v).
D = 4g / 7.1 ml
D = 0.56 g/ml
the meaning of diffusion