AnswersQ5 Biology 2014The Endocrine and Exocrine Systems

The Cardiovascular System Answers

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In the past, an irregular heart rhythm was treated by using a drug to help regulate the beat. There is a treatment that can also regulate heart rhythms that has replaced drugs in some cases. What is that treatment?

A
pacemaker
B
angioplasty
C
clot-dissolving drugs
D
myocardial infarction
2
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Frog hearts have a chamber where deoxygenated blood can mix with oxygenated blood. What structure in the human heart prevent such mixing?

A
atria
B
pericardium
C
septum
D
blood vessels
3

Which best describes the pericardium?

A
structures inside the heart that ensure that blood flows in one direction only
B
a sac around the heart that allows the heart muscle to receive oxygen
C
a sac around the heart that protects the heart and chest tissues
D
structures inside the heart that bring blood to the lungs for oxygenation
4

Why do capillaries need to be thin walled?

A
so only a few nutrients can pass through
B
so only a small amount of blood can flow through
C
so they can go through the small spaces within the body
D
so the exchange of gases and nutrients can happen
5

Why do arteries need to be thick, muscular, and elastic?

A
to make our bodies strong for movement
B
to withstand the pressure of blood being pumped by the heart
C
to pull the blood back to the heart from all areas of the body
D
to withstand changes in blood temperature
6

The respiratory system allows for gas exchange to happen in the lungs. How do the respiratory and cardiovascular systems interact?

A
The respiratory system supplies the carbon dioxide that the cardiovascular system transports to the different cells for the production of energy.
B
The respiratory system supplies the oxygen that the cardiovascular system transports to the different cells for the production of energy.
C
The cardiovascular system supplies the carbon dioxide that the respiratory system transports to the different cells for the production of energy.
D
The cardiovascular system supplies the oxygen that the respiratory system transports to the different cells for the production of energy.
7

Which best describes arteries and veins?

A
Both have valves.
B
Both are thick, muscular, and elastic.
C
Arteries carry blood back to the heart; veins connect arteries and capillaries.
D
Arteries carry blood away from the heart; veins carry blood back to the heart.
8

Which describes how blood can be protective in nature?

A
by forming a protective layer within blood vessels
B
by carrying cells that defend the body from foreign materials
C
by secreting oil that destroys foreign materials
D
by producing acid that kills foreign materials
9

Which of the following processes is directly affected by the cardiovascular system?

A
hair growth
B
muscle strength
C
healing of cuts
D
hormone release
10

Which statement best describes the difference between atria and ventricles?

A
Atria push blood from the veins to the ventricles, and ventricles push blood from the atria to the arteries.
B
Atria push blood from the ventricles to the arteries, and ventricles push blood from the veins to the atria.
C
Atria are on the bottom of the heart, and ventricles are on the upper part of the heart.
D
Atria receive oxygenated blood, and ventricles receive deoxygenated blood.

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