Body Fluid - 15-11-23

During cardiac cycle about ________% of ventricular filling occurs prior to atrial contraction. __________% ventricular filling occurs due to atrial contraction –

• (a) 50, 50

• (b) 70, 30

• (c) 30, 70

• (d) 10, 90

When ventricular systole occurs –

• (a) Auricular diastole coincides

• (b) Tricuspid and bicuspid valves close

• (c) Semilunar valves guarding pulmonary artery and aorta are forced to open

• (d) All

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

Bundle of His is a group of –

• (a) Ganglia

• (b) Nerve fibres

• (c) Muscular fibres

• (d) Connective tissue

Rate of heart is determined by –

• (a) SAN

• (b) AVN

• (c) Purkinje fibres

• (d) Bundle of His

‘Heart of heart’ is –

• (a) SA-node

• (b) AV-node

• (c) Bundle of His

• (d) Purkinje fibres

Please observe the Cardiac Cycle below. For how much duration does joint diastole occur in the given cardiac cycle.

• (a) 0.4 seconds

• (b) 0.3 seconds

• (c) 0.7 seconds

• (d) None

The surfaces of erythrocytes contain genetically determined types of proteins that are responsible for the two major blood group classifications, which are

• (a) ABO and Rh

• (b) Type A and Type B

• (c) Type AB and O

• (d) Rh^– and Rh⁺

A labeled red blood corpuscle is released into the arterial circulation in the left leg. It is recaptured 30 seconds later in the left lung. What is the minimum number of chambers of the heart it must have passed through?

• (a) 0

• (b) 1

• (c) 2

• (d) 3