The action potential causes ______ and then the ______ to undergo ______ followed by ______.

(1) ventricles, atria, contraction, relaxation

(2) atria, ventricles, contraction, relaxation

(3) ventricles, atria, relaxation, contraction

(4) atria, ventricles, relaxation, contraction

Angina is more common in–

(1) Young Men

(2) Aged Women

(3) Middle aged and elderly men and women

(4) children

The action potential of ventricular side and to the entire ventricular musculature is conducted by–

(1) AVN, AV bundle and Bundle of His

(2) SAN, AVN, AV bundle and Bundle of His

(3) SAN, AV bundle and Bundle of His

(4) Only by Bundle of His

The tricuspid and bicuspid Valves are closed because of

(1) Atrial systole

(2) Attempted backflow of blood into the atria

(3) Ventricular relaxation

(4) Ventricular filling

Arrange the following events in a proper sequence.

(i) Increased ventricular pressure

(ii) Attempted backflow of blood into the atria

(iii) Ventricular systole

(iv) Closure of AV valves

(1) (i) – (ii) – (iii) – (iv)

(2) (ii) – (i) – (iii) – (iv)

(3) (iii) – (i) – (ii) – (iv)

(4) (i) – (iii) – (ii) – (iv)

Imagine, if the semilunar valves do not work, which of the following event won’t happen surely?

(1) Atrial Contraction

(2) Ventricular Contraction

(3) flow of blood

(4) Heart sound production

SAN is responsible for

(1) initiating and maintaining a random contractile ability of heart

(2) initiating and maintaining a rhythmic contractile ability of heart

(3) maintaining a random contractile ability of heart

(4) Initiating a rhythmic contractile ability of heart

Semilunar valves are found between

1. left ventricle and aorta

2. right ventricle and pulmonary artery

3. left ventricle and pulmonary vein

4. both (1) and (2)

Bicuspid valves are present between

(1) left atria and aorta

(2) right atria and pulmonary artery

(3) left atria and left ventricle

(4) right atria and right ventricle

Match the following:

1. p–g; q–h; r–e; s–f

2. p–f; q–e; r–h; s–g

3. p–e; q–h; r–f; s–g

4. p–f; q–g; r–h; s–e