The drug Viagra promotes blood vessel dilation by prolonging signaling through nitric oxide (NO). How does Viagra boost NO?
a. It inhibits guanylyl cyclase in smooth muscle cells.
b. It prevents acetylcholine from binding to its receptors.
c. It stimulates guanylyl cyclase in smooth muscle cells.
d. It blocks the enzyme that degrades cyclic GMP.
e. It binds to acetylcholine receptors on endothelial cells.

Answers

Answer 1

Answer:

The correct answer is option d, that is, it prevents the enzyme, which degrades cyclic GMP.

Explanation:

Oral therapy for erectile dysfunction is Viagra, which is the citrate salt of sildenafil, it works by preventing a specific phosphodiesterase type 5 or PDE5, which is the inhibitor of cGMP. During sexual stimulation, nitrous oxide is released in the corpus cavernosum causing the erection of the penis in males. The nitrous oxide then stimulates the enzyme guanylate cyclase that further makes the concentration of cGMP to elevate, this generates smooth muscle relaxation in the corpus cavernosum and permitting blood the inward flow of blood.

Viagra works by increasing the influence of nitric acid by preventing PDE5, which is accountable for the deprivation of cGMP in the corpus cavernosum. At the time of sexual stimulation, the discharging of nitrous oxide takes place, the viagra inhibits PDE5 causing the levels of cGMP to elevate in the corpus cavernosum leading to smooth muscle relaxation and continuous flow of blood to the corpus cavernosum.


Related Questions

are there exits alloted for emergency escape plan? how many?​

Answers

Answer:

The correct answer is - yes, multiple exits but a minimum of 2 is a must.

Explanation:

An emergency escape plan is a documented map or plan of a building that is created for the safe evacuation in an emergency such as fire, smoke, natural disaster, or any panic situation.

In an emergency escape plan, there must be easy exits for faster and safe evacuation even in low visibility or smoke condition. Multiple exit routes are allowed to any escape plans, however, two is the minimum number of exits is compulsory.

Yes, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be necessary.

What is an emergency escape plan?

An emergency escape plan is the urgent immediate egress or escape of people away from an area that contains an imminent threat of destruction, an ongoing threat, or a hazard to lives or property.

An emergency escape plan provides a path for the people of a particular area to move away from the risky or threatened places immediately. So, emergency exits play a significant role when there is any natural disaster, fire, smoke, etc. has occurred.  

Therefore, there are exits alloted for emergency escape plans. It should be multiple in number but a minimum of 2 must be mandatory.

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∠A and \angle ∠B are supplementary angles. If m\angle A=(3x-23)^{\circ}∠A=(3x−23)

and m\angle B=(2x-12)


, then find the measure of \angle ∠B.

Answers

Answer:

[tex]B = 74[/tex]

Explanation:

Given

[tex]A=(3x-23)[/tex]

[tex]B=(2x-12)[/tex]

Required

Find B

Since A and B are supplementary, then:

[tex]A + B = 180[/tex]

Substitute values for A and B

[tex]3x - 23 + 2x - 12 = 180[/tex]

Collect Like Terms

[tex]3x + 2x = 180 + 23 + 12[/tex]

[tex]5x = 215[/tex]

Divide through by 5

[tex]\frac{5x = 215}{5}[/tex]

[tex]x = 43[/tex]

Substitute 43 for x in [tex]B=(2x-12)[/tex]

[tex]B = 2*43 - 12[/tex]

[tex]B = 74[/tex]

Can someone help me plz ! I’ll cash app

Answers

dominant is correct

What is the meaning of the phrase rising star? working harder than others more popular than others showing superiority in strength growing quickly in importance

Answers

Answer: I think the answer is growing quickly in importance.

Hope this helps :)

Explanation:

Why do waves move faster at higher temperatures and in a solid phase?
O There is more energy and the particles are farther apart.
O There is less energy and the particles are closer together.
O There is less energy and the particles are farther apart.
There is more energy and the particles are closer together.

Answers

Answer:

B

Explanation:I took the test if u need help follow me

Waves move faster in higher temperature and in solid phase because there is more energy and the particles are closer together.

What is meant by intermolecular force ?

Intermolecular force is defined as the force of attraction experienced between the neighboring molecules in the same state.

Here,

During higher temperature and when in a solid phase, the waves exhibit movements very faster than in other phases.

This is because, when the temperature of the system is increased, the energy of the molecules in the system will be increased to a higher level. This energy formation is in the form of kinetic energy of the molecules.

Molecules in the solid phase have a greater intermolecular force of attraction with their neighboring molecules. Therefore, the molecules in the system will be more closer to each other.

As the kinetic energy of the molecules in the system increases, the molecules will start vibrating. These vibrating molecules induces the vibration to their neighboring particles, since they are closer together.

As a result, more and more highly energetic molecules are set to vibrate, which causes the wave to move faster in the system.

Hence,

Waves move faster in higher temperature and in solid phase because there is more energy and the particles are closer together.

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After the first replication was observed in their experiments testing the nature of DNA replication, Meselson and Stahl could be confident of which of the following conclusions?

a
Replication is semi-conservative.
b
Replication is not dispersive
c
Replication is not conservative.
d
Replication is neither dispersive nor conservative.

Answers

Replication is semi-conservative because the two chains of DNA are separated by the helicase and corresponding nucleotides are placed on each chan by an enzyme called DNA polymerase

When will an insect that undergoes incomplete metamorphosis develop a set of wings?


a.
after its final molt


b.
when it becomes a pupa


c.
when it breaks out of its chrysalis


d.
only insects that undergo complete metamorphosis have wings

Answers

Answer:

The answer is D not sure

Explanation:

Like those of several other insect species, the stages of growth that the nymph cricket undergoes are referred to as "instars." Crickets usually go through eight to 10 instars before reaching adulthood, which takes about two to three months. Crickets start to develop wings at about 1 month of age.

Two parents, both with brown eyes, have four children. One child has brown eyes, like his parents, but the other three all have blue eyes. One of the children has been learning about genetics in science class and knows that brown eyes are dominant to blue eyes in humans. The student developed the following model of a Punnett square to predict the genotypes of his parents and his siblings.

Based on his model, the student claims that only one of the four children should have blue eyes. Which of the following explanations best describes why the Punnett square does not model the traits in the student’s family? (DOK 3)

Answers

Answer:

Punnett squares are not exact answers, they are only used to predict traits.

A.

The student is forgetting that a Punnett square is used to predict the outcomes of a genetic cross. The actual results do not always match up to the predicted outcomes.

Why is it important to avoid applying too much nitrogen fertilizer?
O A. Too much nitrogen can buffer cells from extremes in pH.
B. Too much nitrogen in surface runoff can poison fish.
C. Too much nitrogen in surface runoff can cause algae to overgrow.
O D. Too much nitrogen can increase the salinity of soil.

Answers

Answer:

too much nitrogen in surface runoff can cause algae to overgrow

Nitrogen fertilizers used in large-scale agriculture could leave a legacy of pollution that would persist for decades in soil and groundwater, scientists in France and Canada warned, which published a study in the National Academy of Sciences magazine, " PNAS ". According to these scientists, the excess of these fertilizers in the environment has been linked to contaminated drinking water and can cause the rapid growth of algae that compromise aquatic ecosystems and coastal marine life.

Explanation:

Brainliest please?

if you are to establish your own animal and fish raising business,what it would be and why?​

Answers

Answer:If you are to establish your own animal and fish raising business,what it would be and why?​ Get the answers you need, now!

Explanation:

Looking at the image of the freshwater lake ecosystem in the reading, can you name biotic and abiotic factors in this specific ecosystem? What changes in this ecosystem would impact the biotic factors?

Answers

Answer:

Biotic: Fish, Plants, Animals, Some bacteria in the water

Abiotic: Water, Sunlight, Rocks

Changes to any ecosystem can affect the way organisms live. It can be a big change like having to adapt to their surroundings. An example is being camouflaged, or having an increase in population. Bad changes can lead to population decline, or maybe even being extinct.

Explanation:

There isn't really an image to see, but I put what I could think would be in a lake ecosystem.

Why is it logical to see that “parasitic” genomes tend to be much smaller than similar free-living organisms?

Answers

It’s logical because their small size contributes to the efficiency of their inhabitation of another organism.

For a quantitative trait explained by four loci in an additive fashion, if the four locus genotype AaBbCcDd corresponds to a phenotypic value of 32, and the four locus genotype AABBCCdd corresponds to a phenotypic value of 48, then what is the phenotypic value corresponding to the four locus genotype AABbcCDD?

Answers

Answer:

48

Explanation:

In genetics, additive effects represent a mode of quantitative inheritance that occurs when the combined effects of alleles (i.e., the variants of a gene that lead to differential expression of a phenotypic trait) at two or more loci are equal to the sum of their individual effects, contributing thus to the final phenotype. Therefore, the additive variance can be explained by the sum of the individual effects of identified loci/genes that have an additive effect on this quantitative trait. In this case, each gene shows an additive effect (equal to 8 for each dominant allele), thereby the phenotypic value corresponding to the genotype AABbCcDD will be equal to 48 (i.e., 16 + 8 + 8 + 16 = 48).

which is a non-renewable resource that is used to generate electrical energy?

A.water
B.coal
C.sunlight
D.ores​

Answers

Answer:

B) Coal

Explanation:

B) Coal

It is coal, bc coal is a non-renewable resource

1. What happened to the balloons when the bottle was squeezed? /2​

Answers

Answer:

the balloons blew then flew

Which statement best summarizes how the light-dependent reactions and light-independent reactions (Calvin cycle) work together during photosynthesis
The light-dependent reactions capture energy and the light-independent reactions use that energy to make glucose
The light-dependent reactions capture energy and the light-independent reactions use that energy to make ATP
The light-dependent reactions take in glucose (food energy) and the light-independent reactions use the glucose to make ATP
The light-dependent reactions capture bees and the light-independent reactions blend those bees up into golden cheddar mac and cheese... watch
out for the stingers though
The light-dependent reactions take in glucose (food energy) and the light-independent reactions use the glucose to make energy in the form of
sunlight

Answers

The light-dependent reactions capture energy and the light-independent reactions use that energy to make glucose

The energy captured in the light-dependent reactions is stored in ATP and NADPH and is used in Calvin's cycle to fixateCO2 in order to synthesize glucose

"What is the function of the organelle known as the mitochondria" a:to make carbon hydrates b: to make lipids c: to make ATP d: protein synthesis

Answers

Answer:

To make ATP

Explanation:

How does this correlate to the severity of these diseases?

Answers

What disease specific

Myasthenia Gravis is a disease characterized by the production of antibodies against nicotinic acetylcholine receptors resulting in a decrease of functioning receptors at Motor end plates. Physiologically, what might you expect to happen as a result?
a. clonus
b. increased frequency of motor neuron firing
c. chorea
d. paralysis of skeletal muscle

Answers

Answer:

The correct answer is - option d.

Explanation:

Myasthenia gravis is an autoimmune condition in which nerve endings are targeted due to the body produces antibodies against receptors of nicotinic acetylcholine which results in less or no functioning of nerve endings of motor neurons mostly.

Options A, B, and C all three conditions are all due to an increase in muscle movement which is not the case as it causes weakness in the muscles due to less functioning in motor end plates.

Capillaries are blood vessels that *

A.) deliver blood to the cells of the body

B.) contain striated muscle

C.) carry blood toward the heart

D.) readily exchange materials between the blood and body cells

Answers

Answer:

D.

Explanation:

The primary function of capillaries is the exchange of materials between the blood and tissue cells.

Identify the following carbohydrate

A. Monosaccharide

B. Disaccharide

C. Polysaccharide

D. None of the above

Answers

Answer:

Its A.

Explanation:

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your answer would be answer A

What process is believed to be responsible for the formation of the Grand Canyon?
A. diverging tectonic plates
B. converging tectonic plates
C. caving in of the ground due to erosion.
D. erosion over a long period of time

Answers

Answer:

D. Erosion over a long period of time.

Answer:

The answer is d

Explanation:

I hope I help

Which of the following happens because of mitosis? (Check all that apply)

Answers

Answer:

1,2

Explanation:

During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. ... Then, at a critical point during interphase (called the S phase), the cell duplicates its chromosomes and ensures its systems are ready for cell division.

Using the chart on page 257 in your text as a guide, explain how the two memory systems (automatic and effortful) processes work.

Answers

Can we see the chart?

What compound do organisms get from the air for cellular respiration?

A.Carbon Dioxide

B.Oxygen

C.Water

D.ATP

Answers

Answer:

D. ATP

Explanation:

During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell. Carbon dioxide and water are created as byproducts. In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.

TOM CREATES A MODEL THAT SHOWS THE MOVEMENT OF THE TECTONIC PLATES OF THE EARTH'S SURFACE. IF HE WANTS TO USE THE MODEL TO UNDERSTAND THE CONCEPT OF HOW A MOUNTAIN IS FORMED, HOW DOES THAT MODEL HELP HIM? *

A. IT SHOWS ALL OF THE PLATES IN THE CORRECT LAYOUT.
B. IT EXPLAINS IN DETAIL HOW MOUNTAINS ARE FORMED.
C. IT DISPLAYS DETAILS THAT CANNOT BE SEEN IN A DRAWING.
D. IT SPEEDS UP A PROCESS THAT TAKES MILLIONS OF YEARS.

Answers

Answer:

a: i think

Explanation:

1) Jupiter, mars, and_______ have wind
2) ______ means to wear away
3) at a wind farm they harvest_______ energy

Answers

Answer:

1)Earth

2)disappear

3)Solar energy

Explanation:

I am not sure but hope it helps let me know if its correct.

GOOD LUCK!

A student studying primary succession should focus on which of these communities?​

Answers

Answer:

yes it is

Explanation:

people need goals!

i need the ansewer to this but i scammed these points any way
Which statement describes carbohydrates?

Carbohydrates store and transmit an organism’s genetic information.
Carbohydrates provide energy to organisms.
Carbohydrates help with an organism’s tissue growth and repair.
Carbohydrates provide an organism with long-term energy storage.

Answers

Where do we hypothesize that plants came from?

Metamorphic rocks are a bit harder to identify because they can share traits with the other rock types. Again, thinking about the formation process can help. Metamorphic rocks have been heated and squashed. This can lead the minerals in them to line up, creating ribbon-like layers called bands. These rocks are called foliated metamorphic rocks. You can see these bands in gneiss. If a metamorphic rock has fossils, you know it was formed from a sedimentary rock. Because of the heat and pressure, the fossil will be hard to recognize and out of shape.

Which of the following best describes foliated metamorphic rocks?

A
There are easily recognizable fossils.

B
The rock has ribbon-like layers of bands.

C
They have crystals like igneous rocks.

D
Different sized sediments can be see

Answers

Answer:

b

Explanation:

the fourth sentence in the passage: "This can lead the minerals in them to line up, creating ribbon-like layers called bands."

Dark and light bands may alternate due to the separation of mafic (dark) and felsic (light) minerals.  Having different grain sizes in the same mineral can also result in banding. Thus, option B is correct.

What are the ribbon layer present in the rock?

Under the surface of the earth, metamorphic rocks are formed. The extreme heat and pressure cause them to alter. Their layers resemble ribbons. Some of them are covered in bright crystals.

Under the earth's surface, metamorphic rocks are created as a result of the transformation brought on by extreme heat and pressure (squeezing).

These processes produce rocks that frequently have layers that resemble ribbons and may have glittering crystals on their surface that were created by minerals slowly growing over time.

Therefore, This can lead the minerals in them to line up, creating ribbon-like layers called bands

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HELP PLEASE!!!!!!!!!!!!!!! Which set of ordered pairs represents a function? (1 point)A) {(0, 1), (1, 3), (1, 5), (2, 8)}B) {(0, 0), (1, 2), (2, 6), (2, 8)}C) {(0, 0), (0, 2), (2, 0), (2, 4)}D) {(0, 2), (1, 4), (2, 6), (3, 6)} What is the product of this multiplication? Choose the sentence that best uses a synonym as a context clue to clarify the meaning of the italicized word. (5 points)A.We can only speculate about what caused dinosaurs to become extinct. (word is speculate)B.After the strenuous exercise at school, I went home to finish my homework.(word is strenuous)C.My brother always cautions me not to exaggerate when I tell stories about my day.(word is exaggerate)D.I know I left my laptop in the vicinity of the playing field, which is near the bleachers. (word is vicinity) The Monroe Doctrine declared that the United States would Sally used 5 gallons of ginger ale, 1 gallon of orange juice, and 2 gallons of pineapple juice, to make a punch for her family holiday party. How manyquarts of punch will Sally have for her party?32 quarts52 quartsO 36 quarts12 quarts Write 0.000739 in scientific notation. Which is an equation of a line with undefined slope? question for zmlyles24 Which resource will NOT help you learn to perform car maintenance work on your own? A. Model car instructions B. Information found online C. Experienced car owners D. The owner's manual Ball and socket joints allow bones to move _____.back and forthin all directionsacross each otherup and down Which are challenges for study groups? Check all that apply.a) lack of focus during meetingsb) too many new perspectivesc) problems with communication d) lack of commitment to dutiese) overly motivated participants what is 43,6480x344608= Which scenario shows a division of labor? O A. In the lunchroom line in the school cafeteria, two workers serve the food to all the students. O B. On an assembly line at a car factory, some workers attach windows todays while others paint the cars. O C. At the toll stops on a major road, one worker collects money in one toll booth while another worker collects money in a different toll booth. O D. At the museum, there are always several people available to provide guided tours for people who are interested in learning more about the museum's collections. Answer ASAP!! There is only a blank circle on the left Use the table that shows the prices of different amounts of mixed fruit at the grocery store. Please help A line includes the points (-15, 5) and (-12, 5). What is its equation in slope-intercept form? form A right square pyramid is shown. The height of the pyramid is 6 units. The distance from the center of the base of the pyramid to vertex D is 2.5 units, as shown. Find the length of segment AD, in units. CHECK ATTACHED DOC!!1. Yo no hago la cama todos los das.2. Casi nunca resuelvo mis problemas.3. Nunca guardo mis documentos importantes.4. Es difcil para m terminar mis tareas.5. Siempre se me olvida firmar mis tarjetas de crdito.6. Nunca pongo la mesa cuando ceno.7. No quiero escribir la composicin para maana.8. Casi nunca lavo mi carro, What is the slope of the graph of y=12x19y=12x19?