Platelets are formed from–

(1) Megakaryoblast

(2) Megakaryocyte

(3) Macrokaryoblast

(4) Macrophages

Match the following:

1. (i) → r, (ii) → p, (iii) → q

2. (i) → p, (ii) → r, (iii) → q

3. (i) → q, (ii) → p, (iii) → r

4. (i) → r, (ii) → q, (iii) → p

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

If a person gets his blood count done from a lab and finds his platelets to be 20000 and then meets an accident on that day. Which of the following is correct?

(1) as the platelet count is normal, there will be no harm to him because of platelets.

(2) Clotting disorders

(3) Severe Blood loss from body

(4) both (2) and (3)

Thrombokinase performs a specific function in human body

Choose the correct option

1. Thrombin        $\stackrel{}{\to }$      Prothrombin    

2. Fibrinogen       $\stackrel{}{\to }$      Fibrin

3. Fibrin              $\stackrel{}{\to }$      Fibrinogen

4. Prothrombin    $\stackrel{}{\to }$       Thrombin

Arrange the following component in the sequence of activation of  blood clotting mechanism?

1. (i), (ii), (iii), (iv), (v)
2. (i), (iv), (v), (ii), (iii)
3. (iii), (iv), (v), (i), (ii)
4. (v), (iv), (iii), (ii), (i)

Fibrins are formed by conversion of _______ in _______ by the enzyme _______

(1) Fibrinogen, serum, Thrombokinase

(2) prothrombin, plasma, thrombin

(3) Fibrinogen, plasma, thrombin

(4) Prothrombin, blood, thrombokinase

Which of the following is correct regarding
thrombin?

(1) It is a protein of primary structure

(2) Converts soluble fibrinogen of plasma into
insoluble fibrin

(3) Converts insoluble fibrinogen into insoluble
fibrin

(4) Converts fibrin into fibrinogen

During the initiation of coagulation of blood, the platelets are activated by–

(1) Thrombin

(2) Trauma

(3) Ca⁺⁺

(4) Thrombokinase

Which of the following plasma protein helps in coagulation of blood ?

1. Fibrin

2. Prothrombin

3. Vitamin K

4. Albumin