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Body Fluids and Circulation · Question 18

NEET (UG) 2021MCQEasy📈 Topic in 50% papers+4−1
1

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

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

Answer

(2) Thrombin

Solution

As per NCERT, during coagulation an enzyme complex, thrombokinase, converts inactive prothrombin of plasma into thrombin.

Thrombin then converts inactive fibrinogens into fibrins, which form the network of threads of the clot.

Prothrombin Thrombokinase Thrombin

Fibrinogen Thrombin Fibrin

Answer: (2)

NEET (UG) 2021

Keep practising — Body Fluids and Circulation

2

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)
NEET (UG) 2020
3

The QRS complex in a standard ECG represents

  1. Repolarisation of ventricles
  2. Repolarisation of auricles
  3. Depolarisation of auricles
  4. Depolarisation of ventricles
NEET (UG) 2020
4

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)
NEET (UG) 2019
5

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
NEET (UG) 2019
6

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)
NEET 2018
7

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)
NEET 2018
8

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
NEET 2017
9

The hepatic portal vein drains blood to liver from

  1. stomach
  2. kidneys
  3. intestine
  4. heart.
NEET 2017
10

Blood pressure in the pulmonary artery is

  1. more than that in the pulmonary vein
  2. less than that in the venae cavae
  3. same as that in the aorta
  4. more than that in the carotid.
NEET 2016 (Phase 1)
11

Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body.

  1. Erythrocytes
  2. Leucocytes
  3. Neutrophils
  4. Thrombocytes
NEET 2016 (Phase 2)

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