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Author Question: The mitral (bicuspid) valve does which of the following? a. Prevents atrial backflow during ... (Read 69 times)

anshika

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on: Jul 16, 2018
The mitral (bicuspid) valve does which of the following?
 
  a. Prevents atrial backflow during ventricular contraction.
  b. Separates the right atrium and the left atrium.
  c. Separates the right atrium and the right ventricle.
  d. Separates the right ventricle and the pul-monary artery.

Question 2

Most of the muscle mass of the heart is located in which chamber?
 
  a. Left atrium (LA)
  b. Left ventricle (LV)
  c. Right atrium (RA)
  d. Right ventricle (RV)


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raili21

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: A
The valve between the left atrium and ventricle is the bicuspid, or mitral, valve. The AV valves close during systole (contraction of the ventricles), thereby preventing backflow of blood into the atria.

Answer to Question 2

ANS: B
The two lower heart chambers, or ventricles, makeup the bulk of the heart's muscle mass and do most of the pumping that circulates the blood (Figure 9-2). The mass of the left ventricle is ap-proximately two-thirds larger than that of the right ventricle and has a spherical appearance when viewed in anteroposterior cross section.


anshika

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Reply 2 on: Jul 16, 2018
Gracias!

covalentbond

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Reply 3 on: Yesterday
Excellent

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