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Straighterline Pharmacology 101 Final Exam | Pharm- Unit 4 (2021)
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Straighterline Pharmacology 101 Final Exam | Pharm- Unit 4 (2021)
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Straighterline Pharmacology 101 Final Exam | Pharm- Unit 4 (2021)1. Deoxygenated blood passes from the right atrium into the right ventricle through
the _____.
A. bicuspid valve
B. tricuspid valve
C. right semilunar valve
D. mitral valve Correct Ans ➡ B
2. Which of the following statements is true of the blood flow through the heart?
A. The pulmonary veins carry oxygenated blood from the lungs to the left atrium.
B. The left ventricle pumps deoxygenated blood to the lungs through the pulmonary
arteries, where it gets oxygenated.
C. The right ventricle of the heart pumps blood out of the heart into the aorta, where
it gets distributed to the rest of the body.
D. Blood passes from the right atrium into the right ventricle through the bicuspid
valve. Correct Ans ➡ A
3. Select a true statement about the heart.
A. The heart is composed of two muscular chambers.
B. The heart generates the force that pumps the blood through the circulatory
system.
C. All the venous blood from the body is drained into the left atrium of the heart.
D. Blood passes from the right atrium to the right ventricle through the bicuspid valve
of the heart. Correct Ans ➡ B
4. Identify the chamber of the heart from which deoxygenated blood is pumped
through the pulmonary arteries into the lungs.
A. The left ventricle
B. The right ventricle
C. The left atrium
D. The right atrium Correct Ans ➡ B
5. Which of the following chambers of the heart pumps the blood out of the heart into
the aorta, where it then gets distributed to the rest of the body?
A. The left atrium
B. The right atrium
C. The left ventricle
D. The right ventricle Correct Ans ➡ C
6. The _____ carry all the deoxygenated blood from the body and drain it into the
right atrium of the heart.
A. superior and inferior venae cavae
B. coronary arteries
C. pulmonary veins
D. pulmonary arteries Correct Ans ➡ A
,7. The _____ is the muscular layer of the heart.
A. myocardium
B. epicardium
C. endocardium
D. pericardium Correct Ans ➡ A
8. Dr. Calvin is giving a lecture on the properties of cardiac tissue. During the lecture,
he states that the conduction tissue of the heart does not require any external
stimulus to initiate its contractions. It has the ability to initiate its own electrical
stimulation. To demonstrate this property, Dr. Calvin dissects a frog and places its
heart in a petri dish with Ringer's solution. He then asks his students to observe how
the frog's heart continues to beat without any external stimulation. Based on the
information provided in this scenario, which property of the heart is Dr. Calvin trying
to demonstrate?
A. Elasticity
B. Autorhythmicity
C. Contractility
D. Rigidity Correct Ans ➡ B
9. An increase in heart rate primarily begins with stimulation of which part of the
conduction system?
A. Purkinje fibers
B. Atrioventricular bundle
C. Atrioventricular (AV) node
D. Sinoatrial (SA) node Correct Ans ➡ D
10. Identify an accurate statement about the conduction system of the heart.
A. An electrical impulse is normally generated within the atrioventricular node.
B. The Purkinje fibers distribute excitation through the ventricular myocardium.
C. Impulse conduction first results in the contraction of the left ventricle and then in
the contraction of the right ventricle.
D. The left side of the heart pumps a greater amount of blood than the right side of
the heart in a particular amount of time. Correct Ans ➡ B
11. The unique property of the heart that allows it to initiate its own electrical
stimulation is known as _____.
A. autorhythmicity
B. conductivity
C. contractility
D. excitability Correct Ans ➡ A
12. The _____ of the heart is commonly referred to as the pacemaker.
A. The atrioventricular node
B. The bundle of Purkinje fibers
C. The atrioventricular bundle
,D. The sinoatrial node Correct Ans ➡ D
13. The excitation and contraction of the heart begins with the:
A. contraction of the right side of the heart followed by the contraction of the left
side.
B. contraction of the left side of the heart followed by the contraction of the right
side.
C. contraction of both ventricles followed by the contraction of both atria.
D. contraction of both atria followed by the contraction of both ventricles. Correct
Ans ➡ D
14. The P wave of an electrocardiogram (ECG) represents the:
A. depolarization of the atria.
B. repolarization of the atria.
C. depolarization of the ventricles.
D. repolarization of the ventricles. Correct Ans ➡ A
15. In an electrocardiogram, the repolarization of the ventricles is represented by
the:
A. QRS wave.
B. P wave.
C. ST segment.
D. T wave. Correct Ans ➡ D
16. Alex goes to the hospital for a checkup after experiencing severe chest pain. After
a preliminary physical examination, a health care professional asks Alex to lie down,
places small metal disc electrodes on his body, and hooks the electrodes up to a
machine that starts recording the electrical activity of Alex's heart. After the
procedure, the health care professional hands over the recording to a doctor for
analysis. This recording is known as a(n) _____.
A. encephalogram
B. mammogram
C. electrocardiogram
D. angiogram Correct Ans ➡ C
17. When Janice, a patient, complains of chest pain and dizziness, Dr. Hendrick
suspects that Janice is suffering from arrhythmia. Which of the following will help Dr.
Hendrick confirm his suspicion?
A. An electromyogram
B. An encephalogram
C. An angiogram
D. An electrocardiogram Correct Ans ➡ D
18. Identify an accurate statement about the electrocardiogram (ECG).
A. An ECG typically records the electrical activity of the heart from two different
body locations.
, B. An ECG is a visual image generated by the reflected sound waves in an ultrasound
examination of the heart.
C. An ECG is a recording of the electrical activity of the heart that is represented in a
characteristic waveform.
D. An ECG cannot be used to detect cardiac arrhythmias. Correct Ans ➡ C
19. Which of the following statements is true of an electrocardiogram (ECG)?
A. The P wave of an ECG represents the depolarization of the ventricles.
B. The QRS wave of an ECG represents the depolarization of the atria.
C. The T wave represents the repolarization of the ventricles.
D. The QT interval represents the time required for passage of an electrical impulse
from the SA node through the AV node. Correct Ans ➡ C
20. What does the QRS wave of an electrocardiogram (ECG) represent?
A. The repolarization of the ventricles
B. The repolarization of the atria
C. The depolarization of the ventricles
D. The depolarization of the atria Correct Ans ➡ C
21. Identify an accurate statement about the nerve supply of the heart.
A. The heart receives its nerve supply from only one division of the autonomic nervous
system, the sympathetic division.
B. The autonomic nervous system regulates the rate and force of the contractions of
the heart.
C. The norepinephrine released by the sympathetic nerves in the heart act on the
sinoatrial (SA) node to decrease heart rate.
D. The sympathetic nerves that innervate the heart become active when the body
needs to rest and conserve energy. Correct Ans ➡ B
22. In the context of cardiac nerve supply, the sympathetic nervous system:
A. decreases the activity of the SA node, the AV node, and the myocardium.
B. releases the neurotransmitter acetylcholine.
C. has little effect on myocardial contraction.
D. becomes active when the body needs to expend energy during the "fight or flight"
reaction. Correct Ans ➡ D
23. During the "fight or flight" reaction, sympathetic nerves become active and
release _____.
A. serotonin
B. gamma-aminobutyric acid
C. norepinephrine
D. acetylcholine Correct Ans ➡ C
24. Which of the following is a neurotransmitter released by sympathetic nerves that
travels to the sinoatrial (SA) node of the heart to increase heart rate?
A. Serotonin
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