1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AysviL [449]
3 years ago
7

What causes the atrioventricular valves to close during a heartbeat? a Pressure in the atria is higher than in the ventricles. b

Pressure in the atria is lower than in the ventricles. c Pressure in the arteries is higher than in the ventricles. d Pressure in the arteries is lower than in the ventricles.
Biology
1 answer:
max2010maxim [7]3 years ago
6 0

Answer:

The correct answer is -  b Pressure in the atria is lower than in the ventricles.

Explanation:

The atrioventricular valves close when the pressure in the ventricles is more than the pressure in the atria. Which leads to the contraction of the papillary muscles to shut the leaflets of the valves,

When the ventricles relax, atrial pressure exceeds ventricular pressure, the AV valves are pushed open and blood flows into the ventricles. However, when the ventricles contract, ventricular pressure exceeds atrial pressure causing the AV valves to snap shut.

You might be interested in
Marissa suffers from panic disorder, where she experiences unpredictable, unbearable episodes of panic that closely resemble the
Vsevolod [243]

Answer:

A. distress is the correct answer.

Explanation:

Marissa suffers from panic disorder, where she experiences unpredictable, unbearable episodes of panic that closely resemble the symptoms of a heart attack.(This description of her disorder represent distress)

Panic disorder is a stress disorder described by reoccurring sudden panic attacks.

Distress is a situation of severe stress or tension, usually caused by different factors such as failure in the exam, teasing, personal problems, loss of a job, etc.

Distress due to panic or anxiety affects a person's chance of undergoing cardiovascular problems such as stroke, heart attack, and health problems.

Distress changes in the process of blood clots and increases the blood pressure level, weaken the heart muscle that increases the problem of heart attack.

7 0
3 years ago
Did it rain today in texas?​
svetoff [14.1K]

Answer:

No, it did not rain today in Texas.

5 0
3 years ago
Read 2 more answers
do you guys know what to do? because i definitely don’t. i’m stumped so 20 points if you guys can help me out.
Licemer1 [7]

here you g its here gggggggg

i

6 0
3 years ago
D. Which food molecule (carbohydrate, lipid, protein) would you eat if..
podryga [215]

Answer:

carbohydrate for quick energy boost

protein to grow healthy hair

carbohydrate to race tomorrow

proteins to get bigger muscles

Explanation

carbohydrates contain glucose that can be broken down through glycolysis to provide energy in form of ATP. proteins are the main body building organic compounds. Keratin a type of protein is required for healthy hair growth. muscles also require proteins to get bigger.

4 0
3 years ago
What surrounds all cells
erik [133]
The Cell<span> membrane </span>surrounds<span> all living </span>cells<span> and is the most important organelle, there is also a similar plasma membrane that </span>surrounds<span> all the organelles except for the ribosome. It is composed of phospholipids, proteins, and carbohydrates, which are arranged in a fluid mosaic structure.</span>
7 0
3 years ago
Read 2 more answers
Other questions:
  • The structure that grows on the wall of the uterus during pregnancy and allows for nourishment for the unborn child is the?
    5·1 answer
  • Why are phrases such as tongue twisters, so hard to pronounce?<br> Please explain specifically.
    12·1 answer
  • How is the geologic time scale different from time scales that show human activities or accomplishments?
    6·1 answer
  • What volume of a 0.25 M solution can be made using 0.55 moles of Ca(OH)2
    11·1 answer
  • What causes sun spots ?
    9·2 answers
  • The emt is appropriately sizing the airway when she measures:
    7·1 answer
  • In the cell membrane, the molecules which move large molecules into and
    6·1 answer
  • How many chromosomes would a cell have during metaphase I of meiosis if it has 12 chromosomes during interphase?
    14·1 answer
  • In what way can a vector of a zoonotic pathogen differ from a host of the pathogen?
    10·1 answer
  • Which of the following is a Decomposer?A. TreeB. FishC. WormD. Hawk
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!