Question

Blood clotting involves positive feedback in that...

a. activated platelets tend to activate more platelets
b. the enzyme thrombin activates several clotting factors that give rise to more thrombin.
c. clotted blood releases fibrin, which in turn promotes blood clotting.
d. a blood clot stimulates release of clotting factors from surrounding tissues.
e. an injury will stimulate a stress response which promotes blood clotting.

Answer 1

Platelets in the blood start to cling to the injured site and release chemicals that attract additional platelets, which accelerates the process of blood clotting until the clot is large enough to stop the bleeding. This is an example of positive feedback in blood clotting.

Step-by-step explanation:

Platelets in the blood start to cling to the injured site and release chemicals that attract additional platelets, which accelerates the process of blood clotting until the clot is large enough to stop the bleeding. This is an example of positive feedback in blood clotting.