Body Fluids and Circulation · Question 12

Given below are two statements: In the light of the above statements, choose the most appropriate answer from the options given below:

1. Both Statement I and Statement II are correct
2. Both Statement I and Statement II are incorrect
3. Statement I is correct but Statement II is incorrect
4. Statement I is incorrect but Statement II is correct

Which one of the following statements is correct?

1. The atrio-ventricular node (AVN) generates an action potential to stimulate atrial contraction
2. The tricuspid and the bicuspid valves open due to the pressure exerted by the simultaneous contraction of the atria
3. Blood moves freely from atrium to the ventricle during joint diastole.
4. Increased ventricular pressure causes closing of the semilunar valves.

A unique vascular connection between the digestive tract and liver is called.

1. Hepato-cystic system
2. Hepato-pancreatic system
3. Hepatic portal system
4. Renal portal system

Arrange the following formed elements in the decreasing order of their abundance in blood in humans: Choose the most appropriate answer from the options given below:

1. A, C, B, D, E
2. C, A, B, E, D
3. C, B, A, E, D
4. D, E, B, A, C

Persons with 'AB' blood group are called as "Universal recipients". This is due to :

1. Absence of antibodies, anti-A and anti-B, in plasma
2. Absence of antigens A and B on the surface of RBCs
3. Absence of antigens A and B in plasma
4. Presence of antibodies, anti-A and anti-B, on RBCs

Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?

1. Thrombokinase
2. Thrombin
3. Renin
4. Epinephrine

Match the following columns and select the correct option.

1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

The QRS complex in a standard ECG represents

1. Repolarisation of ventricles
2. Repolarisation of auricles
3. Depolarisation of auricles
4. Depolarisation of ventricles

Match the Column-I with Column-II : Select the correct option.

1. (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
2. (a)-(iv), (b)-(i), (c)-(ii), (d)-(v)
3. (a)-(ii), (b)-(i), (c)-(v), (d)-(iii)
4. (a)-(ii), (b)-(iii), (c)-(v), (d)-(iv)

What would be the heart rate of a person if the cardiac output is 5 L, blood volume in the ventricles at the end of diastole is 100 mL and at the end of ventricular systole is 50 mL?

1. 100 beats per minute
2. 125 beats per minute
3. 50 beats per minute
4. 75 beats per minute