Coagulation and blood types

Question 1

Structure and function of platelets

Answer 1

In circulating blood, small, pale bodies that appear as oval disks. Play important role in haemostasis.

Question 2

Physical properties of platelets

Answer 2

Agglutination (clump together), adhesiveness (stick to blood vessel), aggregation (form cluster or clot)

Question 3

Haemostasis

Answer 3

Involves a series of chemical reactions that take place quickly in a certain sequence to result in a net of fibres that traps RBCs

Question 4

Stages of haemostasis

Answer 4

Three stages
Stage 1: activation pathways; intrinsic and extrinsic
Stage 2: thrombin formation
Stage 3: fibrin clot formation

Question 5

Blood clotting