Body Fluids and Circulation

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

Match the items given in column I with those in column II and select the correct option given below.

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

Match the items given in column I with those in column II and select the correct option given below.

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

Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?

1. A only
2. A, C and D only
3. B and C only
4. D only