When does the blood enter in Atria. Choose the correct:-
(a) During generation of impulse from SAN
(b) Atrial relaxation
(c) As the tricuspid and bicuspid valves are open
(d)Joint diastole

a,b

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a, b, c

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b, c, d

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all

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Solution

The correct option is A a,b
Heart has two ventricles and two atria, left and right respectively. Deoxygenated blood enters the left atrium through superior & inferior vena cava, when the atria relaxes, blood enters into it, whereas impulse from SA node causes contraction of atria which leads to the flow of blood into ventricles.
Thus, the correct answer is 'a,b.'

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When does the blood enter in Atria. Choose the correct:-(a) During generation of impulse from SAN(b) Atrial relaxation(c) As the tricuspid and bicuspid valves are open (d)Joint diastole

When does the blood enter in Atria. Choose the correct:-
(a) During generation of impulse from SAN
(b) Atrial relaxation
(c) As the tricuspid and bicuspid valves are open
(d)Joint diastole