huckle exam 1

Question 1

angiotensin II

Answer 1

vasoconstrictor hormone that helps maintain basal BP level

Question 2

atrial natiuretic peptide (ANP)

Answer 2

vasodilator hormone that indirectly suppresses angiotensin II production. increases urinary Na+ and water excretion

Question 3

what are the two types of endothelial factors that regulate local blood flow

Answer 3

vasoconstrictors (angiotensin II) and vasodilators (nitric oxide, PGI2)

Question 4

What do metabolites do to regulate local blood flow

Answer 4

vasodilation to increase blood perfusion

Question 5

What are autacoids and examples of them

Answer 5

Vasodilators or vasoconstrictors that modulate local tissue perfusion. Histamine and Bradykinin (aterioloar dilation), Serotonin (ateriolar constriction) and Prostaglandins (both)

Question 6

What can inhibit the Myogenic Response?

Answer 6

Amlodipine (vasodilator drug)

Question 7

Main goal of Global Vascular control

Answer 7

ensure brain/heart receive adequate blood flow

sympathetic NS

Question 8

Main goal of local vascular control

Answer 8

ensure the local tissue receives adequate blood flow to meet its metabolic demands

Question 9

Arteriole end vs Venule end with regards to oncotic and hydrostatic pressure iv. Oncotic and Hydrostatic Pressure Relationship:

Answer 9

1. ARTERIOLE END = ULTRAFILTRATION  vessel hydrostatic pressure > interstitial oncotic pressure  FLUID MOVES OUTWARD of capillaries (colloids in vessel exerting LESS pressure than blood in vessel)
2. VENULE END = REABSORPTION  vessel hydrostatic pressure < interstitial oncotic pressure  FLUID MOVES INWARD to capillaries (colloids in vessel exerting MORE pressure than blood in vessel)