Chapter 19

Question 1

What are the three layers of the walls of all vessels, except for capillaries?

Answer 1

tunica intima, tunica media, tunica externa

Question 2

Capillaries

Answer 2

endothelium with sparse basal lamina

Question 3

Tunia media

Answer 3

sympathetic vasomotor

Question 4

Sympathetic vasomotor

Answer 4

vasoconstriction and vasodilation

Question 5

Elastic arteries

Answer 5

act as pressure reservoirs that expand and recoil as blood is ejected from heart

Question 6

Muscular arteries

Answer 6

active in vasoconstriction - help to shunt blood to different organs

Question 7

Arterioles

Answer 7

control flow into capillary beds via vasoconstriction and vasodilation of smooth mucles

Question 8

Another name for arterioles

Answer 8

resistance arteries

Question 9

Blood pressure

Answer 9

pressure gradient that provides driving force to move blood from high to low

Question 10

Resistance

Answer 10

opposition to flow

Question 11

Blood vessel diameter

Answer 11

has greatest influence on resistance

Question 12

Systolic pressure

Answer 12

left ventricle pumps blood into aorta, imparting kinetic energy that stretches aorta

Question 13

Neural Controls example

Answer 13

if blood volume drops, all vessels constrict (expect those to the heart and brain)

Question 14

Vasomotor center

Answer 14

cause continuous moderate constriction called vasomotor tone

Question 15

Bulk flow depends on what two opposing forces

Answer 15

hydrostatic pressure and colloid osmotic pressure