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  • choose the correct option Statement 1: Atria receive blood from all parts of the body, which subsequently flows to ventricles. Statement 2: Action potential generated at the sino-atrial node passes from atria to ventricles.

Read the following statements and choose the correct option

Statement 1: Atria receive blood from all parts of the body, which subsequently flows to the ventricles.
Statement 2: Action potential generated at the sino-atrial node passes from the atria to the ventricles.

a) Action mentioned in Statement 1 is dependent on action mentioned in Statement 2
b) Action mentioned in Statement 2 is dependent on action mentioned in Statement 1
c) Actions mentioned in Statements 1 and 2 are independent of each other.
d) Action mentioned in Statements 1 and 2 is synchronous.

Answers (1)

The right atria receive blood from the superior vena cava and the left atria from the lungs. The blood then flows into the ventricles. The contraction in Atria moves from SA nodes to AV nodes and then the Purkinje Fibers thereby making the two statements synchronous. The answer is that option (d) Actions mentioned in Statements 1 and 2 are synchronous.

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