Pressure and Flow Physiology

Question 1

What is compliance of a vessel?

Answer 1

Vessel’s ability to accommodate blood flow.

Question 2

Compliance definition

Answer 2

C= V/P

Question 3

Veins synonmous with

Answer 3

Preload

Question 4

Arterioles synonymous with

Answer 4

TPR and Afterload

Question 5

Which has greater compliance: arteries or veins?

Answer 5

Veins

Question 6

What affects blood flow in a vessel?

Answer 6

radius of the vessel/ higher the radius, higher the flow. r^4
resistance- inversely proportional to low.

Question 7

Which has the following greatest total cross sectional area? (arteries, aorta, capillaries)

Answer 7

capillaries

Question 8

What’s the relationship between cross sectional area and flow?

Answer 8

greatest cross area- low flow velocity
low cross area - high flow velocity

Question 9

Which blood vessel is regulator of total peripheral resistance?

Answer 9

arterioles

Question 10

In series: does the blood flow change?

Answer 10

No- its the same throughout the circuit

Question 11

What does viscosity mean?

Answer 11

thickness of the blood, higher thickness (polycythemia) lower velocity of blood flow.

Question 12

Where are the baroreceptors located?

Answer 12

Carotid Sinus and the aortic arch

Question 13

What are the causes of hypotension with bradycardia? (they should have tachycardia)

Answer 13

neurogenic shock, iatrogenic (beta blocker), carotid sinus sensitivity

Question 14

What’s the function of carotid and aortic body chemoreceptors?

Answer 14

respond to chronic hypoxia

Question 15

What is the defintion of orthostatic hypotension?

Answer 15

drop of >20 in SBP, drop in 10> DBP from sitting to standing

Question 16

What is a cause of orthostatic hypotension?

Answer 16

Autonomic Neuropathy (Diabetes, Parkinsons, where the sympathetic and parasympathetic system are affected)