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Biology 2015

Sylvia S. Mader, Michael Windelspecht

Chapter 32

Circulation and Cardiovascular Systems

Educators


Problem 1

Which animals lack a true circulatory system?
a. cnidarians $\quad$ c. nematodes
b. flatworms $\quad$ d. All of these are correct.

Anna M.
Numerade Educator

Problem 2

Which one of these would you expect to be part of a closed, but not an open, circulatory system?
a. ostia $\quad\quad\quad\quad$ d. heart
b. capillary beds $\quad$ e. All of these are correct.
c. hemolymph

Bryan L.
Numerade Educator

Problem 3

Which animal has a closed circulatory system?
a. earthworm $\quad$ b. grasshopper $\quad$ c. hydra $\quad$ d. sea star

Anna M.
Numerade Educator

Problem 4

All vertebrates have
a. a closed circulatory system.
b. a heart with at least three chambers.
c. a two-circuit circulatory pathway.
d. All of these are correct.

Bryan L.
Numerade Educator

Problem 5

A major difference between arteries and veins is that
a. arteries always carry oxygenated blood; veins never do.
b. arteries carry blood away from the heart; veins return blood.
c. only arteries have valves.
d. veins feed blood into capillaries.

Anna M.
Numerade Educator

Problem 6

In which animal does aortic blood have less oxygen than blood in the pulmonary vein?
a. frog $\quad\quad$ d. fish
b. chicken $\quad$ e. All of these are correct.
c. monkey

Bryan L.
Numerade Educator

Problem 7

In humans, blood returning to the heart from the lungs returns to
a. the right ventricle. $\quad$ d. the left atrium.
b. the right atrium. $\quad\quad$ e. both the right and left sides of the heart.
c. the left ventricle.

Anna M.
Numerade Educator

Problem 8

All arteries in the body contain oxygen-rich blood, with the exception of the
a. aorta. $\quad\quad\quad\quad\quad\quad$ c. renal arteries.
b. pulmonary arteries. $\quad$ d. coronary arteries.

Bryan L.
Numerade Educator

Problem 9

Systole refers to the contraction of the
a. major arteries. $\quad$ d. major veins.
b. SA node. $\quad\quad\quad$ e. All of these are correct.
c. atria and ventricles.

Anna M.
Numerade Educator

Problem 10

Which of these is an incorrect statement concerning the heartbeat?
a. The atria contract at the same time.
b. The ventricles relax at the same time.
c. The atrioventricular valves open at the same time.
d. The semilunar valves open at the same time.
e. First the right side contracts, and then the left side contracts.

Bryan L.
Numerade Educator

Problem 11

Label this diagram of the heart.

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Problem 12

Which of the following is not a formed element of blood?
a. leukocyte $\quad$ c. fibrinogen
b. eosinophil $\quad$ d. platelet

Bryan L.
Numerade Educator

Problem 13

Which of these is an incorrect association?
a. white blood cells—infection fighting
b. red blood cells—blood clotting
c. plasma—water, nutrients, and wastes
d. red blood cells—hemoglobin
e. platelets—blood clotting

Anna M.
Numerade Educator

Problem 14

Water enters capillaries on the venous end as a result of
a. active transport from tissue fluid.
b. an osmotic pressure gradient.
c. higher blood pressure on the venous end.
d. higher blood pressure on the arterial side.
e. higher red blood cell concentration on the venous end.

Bryan L.
Numerade Educator