1.11

Question 1

What does Serotonin cause ?

Answer 1

Serotonin causes , smooth muscle of blood vessel to contract-narrowing vessel-cutting off the blood flow to damaged area

Question 2

Which vitamin is vital for the production of the compounds needs for blood clotting ?

Answer 2

Vitamin K

Question 3

What is thromboplastin and what does it do?

Answer 3

Its an enzyme that starts a sequence of chemical changes that clot the blood

Question 4

What is thrombin and what does it do ?

Answer 4

An enzyme that catalyses the conversion of a protein called fibrinogen, into fibrin

Question 5

What does Fibrin do?

Answer 5

Fibrin , an active , enzyme makes a mesh that traps red and platelets to make a clot

Question 6

What is prothrombin?

Answer 6

Prothrombin is a soluble inactive protein in the blood that is a precursor of thrombin

Question 7

What is fibrinogen ?

Answer 7

Fibrinogen is a soluble inactive protein in the blood that is a precursor of fibrin

Question 8

What do platelets do ?

Answer 8

Platelets have two functions in blood clotting:

To form a platelet plug which temporarily coves the cut

To release serotonin and thromboplastin when exposed to collagen