B and T forms, responsible for the immune response are the type of:

(1) Thrombocytes

(2) Lymphocytes

(3) Eosinophils

(4) Granulocytes

Histamine, serotonin and heparin are secreted by:

(1) Thrombocytes

(2) Lymphocytes

(3) Monocytes

(4) Basophils

RBCs in human are:

(1) Biconcave-and nucleated

(2) Biconvex and nucleated

(3) Biconcave and enucleated

(4) Biconvex and enucleated

To avoid Erythroblastosis Foetalis–

(1) the mother is administered anti–Rh antibodies.

(2) the baby is administered Rh antibodies.

(3) the mother is administered Rh antibodies

(4) the baby is administered anti–Rh antibodies

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

A person with blood group O^– can take blood from

(1) O⁺ person

(2) O^– person

(3) A⁺ person

(4) both (1) and (2)

Assertion             :       In mollusca, circulatory system is of closed type.

Reason               :       The blood of mollusca contains haemoglobin

Assertion  :       Histamine is involved in allergic and inflammatory reactions.

Reason     :       Histamine is a vasodilator

During the initiation of coagulation of blood, the platelets are activated by–
1. Thrombin
2. Trauma
3. Ca⁺⁺
4. Thrombokinase