4: Introduction & Cardiovascular Homeostasis

Question 1

The equilibrium between ___ and ___ in the CV system provides an example of intrinsic regulation

Answer 1

• Venous return

- Cardiac output

Question 2

Reductions in MRAP ___ venous return until MRAP becomes ___ to extravascular pressure

Answer 2

Increase

Equal

Question 3

Where do sympathetic post-ganglionic nerve originate?

Answer 3

• 3 upper ganglia

- Superior cervical, middle cervical, stellate

Question 4

Atrial fibrillation is thought to be attributed to an imbalance in the _____

Answer 4

ANS

Question 5

What is the predominant catecholamine released by the adrenal medulla?

Answer 5

Adrenaline (80%)

Question 6

RAAS is stimulated by

1. Sympathetic ___
2. Inc/dec afferent arteriolar pressure
3. Inc/dec sodium load at macula densa

Answer 6

1. Sympathetic stimulation
2. Decreased AA pressure
3. Decreased sodium load

Question 7

Angiotensin II

1. inc/dec sympathetic outflow
2. inc/dec ADH synthesis
3. inc/dec aldosterone
4. vasoconstriction/vasodilation

Answer 7

Angiotensin II

1. inc sympathetic outflow
2. inc ADH synthesis
3. inc aldosterone
4. vasoconstriction

Question 8

What stimulates release of natriuretic peptides?

Answer 8

Atrial (and ventricular) distension