Chapter 42: Circulation

Question 1

What is an example of a portal vein

Answer 1

A blood vessel carrying blood from the stomach to the liver

Question 2

What is the physiological cause of a heart attack?

Answer 2

A blood clot lodges in the vessels that supply blood to the heart.

Question 3

An open circulatory system

Answer 3

allows interstitial fluid to mix freely with vascular fluid

Question 4

What would increase the release of oxygen from hemoglobin?

Answer 4

Increased exercise and decreased blood pH

Question 5

Which of the following correctly lists the sequence of blood flow in mammals?

Answer 5

Venae cavae, right atrium, right ventricle, pulmonary arteries, lungs, pulmonary veins, left atrium, left ventricle, aorta

Question 6

Double circulation circulatory systems are found in ________, and single circulation circulatory systems are found in ________.

Answer 6

amphibians; fish

Question 7

Arteries

Answer 7

Thick-walled vessels; carry oxygenated blood away from the heart.

Question 8

Veins

Answer 8

Thinner-walled vessels; carry deoxygenated blood toward the heart.

Question 9

Capillaries

Answer 9

Very thin-walled (one cell thick); enable exchange of nutrients, gases, and waste between blood and tissues.