Special Circulations

Question 1

Increases in intracranial pressure decrease cerebral blood flow

Vasoactive metabolites: CO2, H+

Answer 1

Cerebral circulation

Question 2

Muscular activity compresses blood vessels

Sympathetic control: Most important mechanism at rest (a1 receptors, vasoconstriction; B2 receptors, vasodilation)

Local metabolic control: most important mechanism during exercise

Vasoactive metabolites: Lactate, K+, Adenosine

Answer 2

Skeletal circulation

Question 3

Sympathetic control: Most important mechanism for temperature regulation (a1 receptors, vasoconstriction)

Answer 3

Skin circulation

Question 4

Lung inhalation

Vasoactive metabolites: Hypoxia

Answer 4

Pulmonary circulation

Question 5

Local metabolic control: Most important mechanism (myogenic; tubuloglomerular feedback)

Answer 5

Renal circulation

Question 6

Mechanical compression during systole

Vasoactive metabolites: Hypoxia, Adenosine

Answer 6

Coronary circulation