B3W3 Special Circulation

Question 1

Cardiac Intrinsic Regulation

Answer 1

Autoregulation
Myogenic Regulation
Endothelial mediated regulation
Metabolic Regulation

Question 2

Autoregulation

Answer 2

Maintain flow relatively constant when pressure is altered

Question 3

Myogenic Regulation

Answer 3

Reflexes caused by relatively sudden changes in pressure

Question 4

Endothelial Mediated regulation

Answer 4

Nitric Oxide vasodilation
Endothelin vasoconstriction

Question 5

Metabolic Regulation

Answer 5

Vasodilator Substances
Reactive Hyperemia

Question 6

Metabolic Vasodilator Substances

Answer 6

H+, K+, CO2, Lactate, Adenosine, and histamine

Question 7

Mutual Inhibition

Answer 7

AB < A+B Both reflexes inhibit each other to lower overall inhibition

Question 8

Additive Summation Combined

Answer 8

AB = A+B
reflexes don’t influence one another

Question 9

Mutual Facilitation

Answer 9

AB > A + B reflexes add together to boost each other

Question 10

Specific Reflex interactions

Answer 10

Arterial and Cardiopulmonary Baroreceptors
Chemo- and Trigeminal

Question 11

Arterial and Cardiopulmonary Baroreceptors

Answer 11

Tonic Inhibition from one set of receptor reduces the gain of the other

Increased gain of arterial baroreflex during upright posture

Question 12

Chemo- and trigeminal

Answer 12

Response to chemoreceptor stimulation is augmented when trigeminal afferents are stimulated

Question 13

Splanchnic Circulation

Answer 13

Metabolically regulated area involving the liver, stomach, spleen, pancreas, small intestine, and colon
Sympathetic inhibition of the blood in these areas
Parasympathetic excitation of blood during rest is caused by spillover