Special Circulation

Question 1

____ is the most powerful vasoconstrictor

Answer 1

ADH or Vasopressin

Question 2

____ plays a role in vasoconstriction and platelet aggregation and is inhibited by prostacyclin

Answer 2

Thromboxane A2

Question 3

Lactic acid is a ____ (vasoconstrictor, vasodilator)

Answer 3

vasodilator

Question 4

CO2 regulates the blood flow to this organ

Answer 4

Brain

Question 5

Local metabolite in the heart significantly controls the blood flow. These are ___ and ____.

Answer 5

Hypoxia and adenosine

Question 6

The organs that are autoregulated are ___, ____, _____

Answer 6

1. Brain
2. Heart
3. Kidney

Question 7

During standing, the decrease ins BP is due to ____

Answer 7

Decrease in VR resulting to decrease CO

Question 8

Vasoconstriction of systemic arterioles increases the BP since it ___

Answer 8

increases the TPR

Question 9

During exercise, the blood supply to the brain ____ (decrease, same, increase)

Answer 9

Same

Increase in - heart
Decrease in - gut, kidney, non-exercising muscle

Question 10

____ parameter decreases during moderate exercise

Answer 10

TPR