Cardiovascular Physiology #6 9/22/15

Question 1

Sympathetic act on ______ in the vasculature causing what?

Answer 1

Alpha receptors, causing vasoconstriction

Question 2

To increase SV (stoke volume) what needs to happen?

Answer 2

Increase:

• End-Diastolic volume
• Norepinephrine delivery from sympathetic neurons
• Epinephrine delivery from the Adrenal Medulla.

Question 3

To Increase Heart rate, what needs to happen?

Answer 3

Increase:

• Norepinephrine delivery from sympathetic neurons
• Epinephrine delivery from adrenal medulla (reduces parasympathetic)

Question 4

What is Ejection Fraction?

Answer 4

A measurement of contractility

*

Question 5

How is Ejection Fraction determined?

Answer 5

EDV (End diastolic volume) - ESV (end systolic volume)

Question 6

What is Hypertrophic Cardiomyopathy?

Answer 6

Characterized by increase heart wall thickness.

- Myocardial disarray, particular in the interventricular septum which interfere with blood ejection.

Question 7

_______ are responsible for adjusting diameter to regulate blood flow.

Answer 7

Arterioles

Question 8

Endothelial cells of the vascular wall secret ________ tat acts on adjacent vascular smooth muscle cells.

Answer 8

Paracrine agents (vasodilators and vasoconstrictors)

Question 9

Is pressure greater in the systemic or pulmonary circuit?

Answer 9

Systemic

Question 10

Maximal arterial pressure is known as ______.

Answer 10

Systolic pressure

Question 11

Minimum arterial pressure is know as _____.

Answer 11

Diastolic

Question 12

Pulse pressure = ?

Answer 12

Systolic pressure - Diastolic Pressure

Question 13

Compliance = ?

Answer 13

Change in volume/ change in pressure