Chapter 20 Vessels

Question 1

What are arteries?

Answer 1

Question 2

What are capillaries?

Answer 2

Question 3

What are veins?

Answer 3

Question 4

Describe the structures of a blood vessel

Answer 4

Question 5

What are the three types of a arteries?

Answer 5

Question 6

How are different capillaries distinguished?

Answer 6

by their premeability

Question 7

What are the three types of capillaries and their premability?

Answer 7

Question 8

In capillary bed most control of flow involves constriction of ____ that are upstream from the capillaries

Answer 8

arterioles

Question 9

Within the capillary bed, ____ controls flow

Answer 9

precapillary sphincters

Question 10

What happens within the capillaries when sphincters are relaxed?

Answer 10

capillaries are well prefused with blood

Question 11

What happens in capillaries whne sphincters contract?

Answer 11

they constrict the entry to the capillaries and blood bypass the capillary

Question 12

What happens in capillaries when sphincters are open vs closed?

Answer 12

Question 13

What are functions of veins?

Answer 13

Question 14

What are the adaptations of veins?

Answer 14

Question 15

Blood supply to a tissue can be expressed by?

Answer 15

flow and perfusion

Question 16

the amount of blood flowing through an organ, tissue, or blood vessel in a given time

Answer 16

blood flow

Question 17

the flow per given volume or mass of tissue in a given time

Answer 17

perfusion

Question 18

At rest, total flow is constant and is _ to the Cardiac output

Answer 18

equal

Question 19

How is systemic blood flow calculated?

Answer 19

Question 20

What is hypertension?

Answer 20

Question 21

What is hypotension?

Answer 21

Question 22

stiffening of arteries due to deterioration elastic tissues of artery walls

Answer 22

arteriosclerosis

Question 23

build up of lipid deposits that become plaques

Answer 23

atherosclerosis

Question 24

How does distance affect blood pressure?

Answer 24

Question 25

What determins blood pressure?

Answer 25

Question 26

What is resistance influenced by?

Answer 26

Question 27

The most important blood in the body in the ____

Answer 27

capillaries

Question 28

two way movement of fluid across capillary walls

Answer 28

capillary exchange

Question 29

How do materials get from the blood into the surrounding tissue?

Answer 29

capillary exchange

Question 30

The flow of blood back to the heart

Answer 30

venous return

Question 31

Explain venous return

Answer 31

Question 32

What are the four mechanisms of venous return?

Answer 32

Question 33

mechanism of contracting muscle squeezes blood out of the compressed part of the vein

Answer 33

skeletal muscle pump (most important)

Question 33

mechanism that allows blood to flow faster with inhalation

Answer 33

thoracic (respiratory) pump