What is the first response to a blood vessel injury?Multiple choice question.blood clot formationvasodilationvascular spasmplatelet plug formation
Question
What is the first response to a blood vessel injury?
- blood clot formation
- vasodilation
- vascular spasm
- platelet plug formation
Solution
Answer to the Multiple Choice Question
The first response to a blood vessel injury is vascular spasm.
Explanation
When a blood vessel is damaged, the immediate reaction is a vascular spasm, which is a temporary constriction of the blood vessel. This process reduces blood flow to the affected area and minimizes blood loss. Following the vascular spasm, other responses such as platelet plug formation and blood clot formation occur, but they happen after the initial spasm.
Summary
In summary, the correct answer is vascular spasm, as it is the first physiological response to a blood vessel injury, serving to limit bleeding effectively.
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