Chapter 20

Question 1

What are the three layers of the blood vessel wall ?

Answer 1

Tunica interna, tunica media, and tunica externa

Question 2

What are hemorrhoids ?

Answer 2

Varicose veins of the anal canal

Question 3

What are arteries ?

Answer 3

The efferent vessels of the cardiovascular system that carry blood away from the heart

Question 4

What are veins ?

Answer 4

The afferent vessels that carry blood back to the heart

Question 5

What are capillaries ?

Answer 5

Microscopic, thin-walled vessels that connect the smallest arteries to the smallest veins

Question 6

What is tunica externa composed of ?

Answer 6

Loose connective tissue

Question 7

What is tunica interna composed of ?

Answer 7

Simple squamous epithelium

Question 8

What is tunica media composed of ?

Answer 8

Smooth muscle, collagen, and elastic tissue in some cases

Question 9

What is the force that blood exerts against a vessel wall ?

Answer 9

Blood pressure

Question 10

What is the most common capillary type ?

Answer 10

Continuous capillaries

Question 11

What are the 3 capillary types ?

Answer 11

Continuous, fenestrated, and sinusoids

Question 12

Which Blood Vessels Carry Blood Away From The Heart ?

Answer 12

Arteries

Question 13

Which Type Of Blood Vessels Carry Blood To The Heart ?

Answer 13

Veins

Question 14

What is the heart ?

Answer 14

The muscular pump that keeps blood flowing through blood vessels

Question 15

What is the other term for “tunica interna” ?

Answer 15

Tunica intima

Question 16

What is the other term for “tunica externa” ?

Answer 16

Tunica adventitia

Question 17

What is perfusion ?

Answer 17

the flow per given volume or mass of tissue, ex:100 grams of tissue per minute

Question 18

Opposition To Blood Flow In Vessels Is Called What ?

Answer 18

Resistance

Question 19

What is autoregulation ?

Answer 19

The ability of tissues to regulate their own blood supply through vasomotion or angiogenesis

Question 20

What is edema ?

Answer 20

The accumulation of excess fluid in a tissue

Question 21

What is venous return ?

Answer 21

The blood flow back to the heart

Question 22

How much of the total body blood is in capillaries at any given time ?

Answer 22

5%

Question 23

What happens to the blood vessels during exercise ?

Answer 23

They dilate to increase blood flow to the muscles

Question 24

What’s the most important mechanism of exchange across capillary walls ?

Answer 24

Diffusion of water and solutes

Question 25

What are 3 causes of edema ?

Answer 25

Obstructed lymphatic damage, increased capillary filtration, and reduced capillary reabsorption

Question 26

What is obstructed venous return shock ?

Answer 26

A type of shock that occurs when the body has a normal blood volume but too much of it accumulates in the lower body

Question 27

Which lipid-soluble substances can diffuse directly across the plasma membrane without the help of membrane channels, filtration pores, or intercellular clefts ?

Answer 27

Oxygen & Carbon Dioxide

Question 28

Where is blood flow through capillaries the slowest & why ?

Answer 28

In the pulmonary circuit to allow more time for gas exchange

Question 29

Which type of shock results from too little blood returning to the heart ?

Answer 29

Low venous return

Question 30

The first venous sinuses collect the blood immediately after circulating through which organ ?

Answer 30

The brain

Question 31

Which 3 major arteries come directly from the aortic arch ?

Answer 31

The brachiocephalic trunk, left common carotid, and left subclavian

Question 32

What three arteries branch directly off the celiac trunk ?

Answer 32

The common hepatic artery, the left gastric artery, and the splenic artery

Question 33

Where does blood collect after it circulates through the brain ?

Answer 33

Dural venous sinuses

Question 34

Which veins form an arc along the lesser curvature of the stomach & empty into the hepatic portal vein ?

Answer 34

The gastric veins

Question 35

What system provides the principal venous drainage of the thoracic wall ?

Answer 35

Azygos system

Question 36

What do the hepatic veins do ?

Answer 36

Drain the liver into the inferior vena cava

Question 37

You’re Not Muted Wtf

Question 38

Which blood vessels contain valves ?

Answer 38

Veins