XI - CIRCULATION - P4

The duration of cardiac cycle in a normal man is

• (A) 0.8 seconds

• (B) 80 seconds

• (C) 60 seconds

• (D) 72 seconds

During systole of heart

• A) Only atria contract

• B) only ventricles contract

• C) Auricles and ventricles contract separately

• D) Auricles and ventricles contract simultaneously

Contraction of right ventricle pumps blood into

• (A) Dorsal aorta

• (B) Pulmonary vein

• (C) Coronary artery

• (D) Pulmonary artery

Cardiac output is determined by

• (A) Heart rate

• (B) Stroke volume

• (C) Blood flow

• (D) Both a and b

The amount of blood to be pumped out by each ventricle/minute is

• (A) Stroke volume

• (B) Cardiac output

• (C) Tidal volume

• (D) Residual volume

P-wave represents

• (A) Depolarization of ventricles

• (B) Repolarization of ventricle

• (C) Repolarization of atria

• (D) Depolarization of atria

T wave on an ECG represents

• (A) Depolarization of ventricles

• (B) Repolarization of ventricle

• (C) Repolarization of atria

• (D) Depolarization of atria

QRS complex represents the

• (A) Depolarization of ventricles

• (B) Repolarization of ventricles

• (C) Repolarization of atria

• (D) Depolarization of atria

The blood cancer is known as

• (a) leukemia

• (b) thrombosis

• (c) haemolysis

• (d) haemophilia

Arteries carry oxygenated blood except

• (a) pulmonary

• (b) cardiac

• (c) hepatic

• (d) systemic