Question

a circulating clot that then blocks a blood vessel is a(n)________.
a intrinsic factor
b thromboembolism
c thrombus
d platelet plug

Explanation:

• Intrinsic factor: It is a glycoprotein involved in vitamin B12 absorption, not related to clot - blocking.
• Thromboembolism: A thrombus (clot) that breaks off and circulates to block a blood vessel.
• Thrombus: A stationary clot in a blood vessel, not a circulating one.
• Platelet plug: Formed during the initial stage of hemostasis (stopping bleeding), not a circulating clot that blocks a vessel.

Answer:

B. thromboembolism