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Vasomotor Center Flashcards

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Questions and Answers

What is the vasomotor center?

Located in the medulla in the brain; stimulates constriction of arterioles.

What is vasoconstriction?

Increases blood pressure.

What is vasodilation?

Relaxes and decreases blood pressure.

What are the receptors that affect the vasomotor center?

Baroreceptors, chemoreceptors, epinephrine/norepinephrine, renin-angiotensin. Signup and view all the answers

What are baroreceptors?

Respond when increasing blood pressure and inhibit the vasomotor center. Signup and view all the answers

What are chemoreceptors?

Respond to decreases in oxygen and increases in carbon dioxide, and stimulate the vasomotor center. Signup and view all the answers

What do epinephrine and norepinephrine do?

Increase blood pressure and stimulate vasoconstriction. Signup and view all the answers

What is renin-angiotensin?

Long-term blood pressure regulation. Signup and view all the answers

Study Notes

Vasomotor Center Overview

Located in the medulla of the brain; central to cardiovascular regulation.
Responsible for stimulating the constriction of arterioles, directly influencing blood pressure.

Key Functions

Vasoconstriction:
- Results in increased blood pressure through narrowing of blood vessels.
Vasodilation:
- Causes relaxation of blood vessels, leading to a decrease in blood pressure.

Receptors Influencing the Vasomotor Center

Baroreceptors:
- Sensitive to changes in blood pressure; inhibit vasomotor center activity when pressure increases.
Chemoreceptors:
- Detect oxygen depletion and carbon dioxide accumulation; stimulate the vasomotor center when oxygen levels drop.
Epinephrine/Norepinephrine:
- Hormones released in response to stress; enhance blood pressure by promoting vasoconstriction.
Renin-Angiotensin System:
- Involved in long-term regulation of blood pressure through hormonal pathways that adjust blood volume and vascular resistance.

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Description

This quiz covers essential concepts related to the vasomotor center, located in the medulla of the brain. It includes definitions of key terms such as vasoconstriction and vasodilation, along with their effects on blood pressure. Test your knowledge and understanding of how receptors influence the vasomotor center!