Chapter 20 Review Questions

Question 1

The endothelium is found in the

Answer 1

Tunica intima

Question 2

Nervi vasorum control

Answer 2

Both vasoconstriction and vasodilation

Question 3

Closer to the heart, arteries would be expected to have a higher percentage of

Answer 3

Elastic fibers

Question 4

What best describes veins?

Answer 4

Thin walled, large lumens, low pressure, have valves

Question 5

An especially leaky type of capillary found in the liver and certain other tissues is called a

Answer 5

Sinusoid capillary

Question 6

In a blood pressure measurement of 110/70, the number 70 is the

Answer 6

Diastolic pressure

Question 7

A healthy elastic artery

Answer 7

Is compliant

Question 8

Which of the following statements is true?

Answer 8

As blood volume decreases, blood pressure and blood flow also decrease

Question 9

Slight vasodilation in an arteriole prompts a

Answer 9

Huge decrease in resistance

Question 10

Venoconstriction increases which of the following?

Answer 10

Blood pressure within vein, blood flow within the vein, and return of blood to the heart

Question 11

Hydrostatic pressure is

Answer 11

The pressure exerted by fluid in an enclosed space

Question 12

Net filtration pressure is calculated by

Answer 12

Subtracting the blood colloid osmotic pressure from the capillary hydrostatic pressure

Question 13

Which of the following statements is true?

Answer 13

In one day, more fluid exits the capillary through filtration than enters through reabsorption

Question 14

Clusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as

Answer 14

The cardiovascular center

Question 15

In the renin-angiotensin mechanism

Answer 15

Aldosterone prompts the kidneys to reabsorb sodium

Question 16

In the myogenic response

Answer 16

Vascular smooth muscle responds to stretch

Question 17

A form of circulatory shock common in young children with severe diarrhea or vomiting is

Answer 17

Hypovolemic shock

Question 18

The coronary arteries branch off the

Answer 18

Ascending aorta

Question 19

The coronary arteries branch off of the

Answer 19

Ascending aorta

Question 20

Which of the following statements is true?

Answer 20

The radial and ulnar arteries join to form the palmar arch

Question 21

Arteries serving the stomach, pancreas, and liver all branch from the

Answer 21

Celiac trunk

Question 22

The right and left brachiocephalic veins

Answer 22

Drain blood from the right and left internal jugular veins, drain blood from the right and left subclavian veins, drain into the superior vena cava

Question 23

The hepatic portal system delivers blood from the digestive organs to the

Answer 23

Liver

Question 24

Blood islands are

Answer 24

Masses of pluripotent stem cells scattered throughout the fetal bone marrow

Question 25

Which of the following statements is true?

Answer 25

One umbilical vein carries oxygen-rich blood from the placenta to the fetal heart

Question 26

The ductus venosus is a shunt that allows

Answer 26

Most freshly oxygenated blood to flow into the fetal heart