Question 1

Which of the following would cause a decrease in cardiac output?

Accepted Answer

A)   An increase in venous return
B)   An increase in afterload
C)   Addition of positive inotropic agents
D)   An increase in heart rateE) A) and C)
F) None of the above

Question 2

Parasympathetic innervation influences the heart rate, but generally tends to have no direct effect on the force of contractions.

Accepted Answer

A) True 
 B)False

Question 3

Explain the factors that affect cardiac output. In your answer provide one example of a positive inotropic agent and one example of a positive chronotropic agent. For each of those examples, explain what specifically happens to the cells of the heart when they have their effect.

Accepted Answer

CO = SV × HR, so a positive in...

Question 4

________ innervation increases the rate and the force of heart contraction.

Accepted Answer

The answer of ________ innervation increases the rate and the...

Question 5

Which describes the endocardium?
A: Has single layer of epithelium
B: Has layer of areolar connective tissue
C: Epithelial cells are squamous
D: Epithelial cells are cuboidal
E: Has layer of adipose connective tissue
F: Has patches of myocardium

Accepted Answer

A)   a, b, c
B)   a, b, d
C)   a, d, e
D)   a, b, c, e
E)   a, e, fF) B) and C)
G) C) and D)

Question 6

The units for perfusion of blood are typically

Accepted Answer

A)   grams per minute.
B)   milliliters per minute per gram.
C)   milliliters per hour per kilogram.
D)   liters per gram.
E)   beats per minute per gram.F) A) and E)
G) A) and B)

Question 7

Which pair is located more anteriorly in a heart in normal position?

Accepted Answer

A)   Left atrium and left ventricle
B)   Left atrium and right ventricle
C)   Right atrium and left atrium
D)   Right atrium and right ventricle
E)   Right atrium and left ventricleF) A) and D)
G) C) and D)

Question 8

Large doses of certain stimulants can lead to dangerous increases in heart rates. Such a stimulant is a

Accepted Answer

A)   positive chronotropic agent.
B)   negative chronotropic agent.
C)   positive inotropic agent.
D)   negative inotropic agent.E) A) and D)
F) A) and C)

Question 9

The main functions of the cardiovascular system include the transport and exchange of respiratory gases, nutrients, and wastes throughout the body.

Accepted Answer

A) True 
 B)False

Question 10

Nodal cells contain fast voltage-gated calcium channels.

Accepted Answer

A) True 
 B)False

Question 11

The pericardial cavity is between the

Accepted Answer

A)   heart muscle and serous pericardium.
B)   fibrous and serous layers of the pericardium.
C)   visceral and parietal layers of the serous pericardium.
D)   parietal and myocardial layers of the fibrous pericardium.E) All of the above
F) A) and D)

Question 12

The internal wall surface of each ventricle displays large, smooth, irregular muscular ridges called

Accepted Answer

A)   conus arteriosus.
B)   atrioventricular opening.
C)   trabeculae carneae.
D)   tendinous cords.
E)   pectinate muscles.F) A) and C)
G) B) and E)

Question 13

The serous fluid within the pericardial cavity works to

Accepted Answer

A)   lubricate membranes of the pericardium.
B)   slow the heart rate.
C)   equalize the pressure in the great vessels.
D)   eliminate blood pressure spikes.
E)   All of the choices are correct.F) D) and E)
G) C) and E)

Question 14

Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?

Accepted Answer

A)   Left atrioventricular valve
B)   Aortic semilunar valve
C)   Right atrioventricular valve
D)   Pulmonary semilunar valve
E)   None of the choices is correct.F) A) and E)
G) B) and C)

Question 15

Cardiac muscle is able to use a variety of fuel types for cellular respiration.

Accepted Answer

A) True 
 B)False

Question 16

Metabolically, cardiac muscle relies on

Accepted Answer

A)   aerobic metabolism using glycolysis of glycogen to meet most ATP demands.
B)   aerobic metabolism using many mitochondria and a rich supply of myoglobin.
C)   anaerobic metabolism using glycolytic enzymes to quickly generate ATP.
D)   anaerobic metabolism using myoglobin, creatin kinase, and ketone bodies.E) C) and D)
F) A) and B)

Question 17

The receiving chambers of the heart are the atria, and the forcefully pumping chambers of the heart are the ventricles.

Accepted Answer

A) True 
 B)False

Question 18

Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions?

Accepted Answer

A)   Pulmonary circuit
B)   Visceral circuit
C)   Coronary circuit
D)   Systemic circuitE) B) and D)
F) A) and B)

Question 19

The hearts nodal cells have a more negative resting potential than neurons do, because nodal cells lack leak channels for sodium and potassium ions.

Accepted Answer

A) True 
 B)False

Question 20

Which prenatal structure forms the ascending aorta and pulmonary trunk?

Accepted Answer

A)   Truncus arteriosus
B)   Sinus venosus
C)   Primitive atrium
D)   Primitive ventricle
E)   Conus cordisF) A) and B)
G) B) and E)

Exam 19: Cardiovascular System: Heart

Which describes the endocardium? A: Has single layer of epithelium B: Has layer of areolar connective tissue C: Epithelial cells are squamous D: Epithelial cells are cuboidal E: Has layer of adipose connective tissue F: Has patches of myocardium

Correct AnswerverifiedShow Answer

Nodal cells contain fast voltage-gated calcium channels.

Correct AnswerverifiedShow Answer

Which prenatal structure forms the ascending aorta and pulmonary trunk?

Correct AnswerverifiedShow Answer

The pericardial cavity is between the

Correct AnswerverifiedShow Answer

Parasympathetic innervation influences the heart rate, but generally tends to have no direct effect on the force of contractions.

Correct AnswerverifiedShow Answer

The internal wall surface of each ventricle displays large, smooth, irregular muscular ridges called

Correct AnswerverifiedShow Answer

The serous fluid within the pericardial cavity works to

Correct AnswerverifiedShow Answer

Large doses of certain stimulants can lead to dangerous increases in heart rates. Such a stimulant is a

Correct AnswerverifiedShow Answer

Explain the factors that affect cardiac output. In your answer provide one example of a positive inotropic agent and one example of a positive chronotropic agent. For each of those examples, explain what specifically happens to the cells of the heart when they have their effect.

Correct AnswerverifiedCO = SV × HR, so a positive in...View AnswerShow Answer

Which valve prevents the backflow of blood into the left ventricle when the ventricles relax?

Correct AnswerverifiedShow Answer

Which of the following would cause a decrease in cardiac output?

Correct AnswerverifiedShow Answer

The main functions of the cardiovascular system include the transport and exchange of respiratory gases, nutrients, and wastes throughout the body.

Correct AnswerverifiedShow Answer

Cardiac muscle is able to use a variety of fuel types for cellular respiration.

Correct AnswerverifiedShow Answer

The units for perfusion of blood are typically

Correct AnswerverifiedShow Answer

Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions?

Correct AnswerverifiedShow Answer

The hearts nodal cells have a more negative resting potential than neurons do, because nodal cells lack leak channels for sodium and potassium ions.

Correct AnswerverifiedShow Answer

The receiving chambers of the heart are the atria, and the forcefully pumping chambers of the heart are the ventricles.

Correct AnswerverifiedShow Answer

Metabolically, cardiac muscle relies on

Correct AnswerverifiedShow Answer

Which pair is located more anteriorly in a heart in normal position?

Correct AnswerverifiedShow Answer

________ innervation increases the rate and the force of heart contraction.

Correct AnswerverifiedShow Answer

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CO = SV × HR, so a positive in...
View Answer

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