CVS Physiology 1

Question 1

What is the importance of most vascular beds being in parallel?

Answer 1

Allows all tissues to get oxygenated blood and allows the regional redirection of blood.

Question 2

What is the relationship between pressure, flow and resistance in blood vessels?

Answer 2

Flow= pressure change/resistance

Question 3

What is the function of arterioles?

Answer 3

Resistance vessels controlling the regional flow of blood.

Question 4

What vessels act as capacitance vessels?

Answer 4

Veins and venules

Question 5

What are the characteristics of the aorta?

Answer 5

Elastic artery
Wide lumen
Thick elastic wall
Damp pressure variations

Question 6

What characterises (muscular) arteries?

Answer 6

Wide lumen
Strong, thick, non elastic wall
Low resistance conduit

Question 7

What characterises arterioles?

Answer 7

Resistance vessels
Narrow lumen
Thick contractile wall
Controls flow
Allows regional redirection of blood

Question 8

What characterises capillaries?

Answer 8

Exchange vessels
Narrow lumen
Thin wall

Question 9

Characteristics of veins and venules?

Answer 9

Capacitance vessels
Wide lumen
Thin, distensible wall
Low resistance conduit and reservoir
Allows fractional distribution of blood between veins and rest of circulation