Question

Choose the accurate statement(s) about the two reaction pathways that lead to the common pathway of coagulation. Check all that apply. Check All That Apply The intrinsic mechanism uses only clotting factors found in the blood itself The extrinsic mechanism uses only clotting factors found in the blood itselt The intrinsic mechanism is initiated by clotting factors released by the damaged blood vessel and perivascular tissues. In most cases of bleeding, both the extrinsic and intrinsic mechanisms work simultaneously to contribute to hemostasis. The extrinsic mechanism is initiated by clotting foctors released by the damaged blood vessel and perivascular tissues.

Answer 1

Answer- a) The intrinsic pathway uses only clotting factors found in blood itself.

b) The extrinsic pathway uses only clotting factors found in blood itself.

e) The extrinsic mechanism is initiated by clotting factors released by the damaged blood vessel and perivascular tissue.

Reason- Plasma contains all of the coagulation factors used in both intrinsic and extrinsic pathways found in blood.

The extrinsic pathway is activated through tissue factor released by endothelial cells after external damage.