Question 1

Which of the following structures does not require stimulation from nerve fibers or other agents?

Accepted Answer

A)   Papillary muscles
B)   Sinoatrial node
C)   Atrial syncytium
D)   AV bundle
E)   Ventricular cardiac cells

Question 2

What is the skeleton of the heart?

Accepted Answer

A)   Bone within the myocardium
B)   Cartilage within the interventricular septum
C)   Fibrous connective tissue encircling the heart valves
D)   Rib cage that surrounds the heart

Question 3

Depolarization of the atria is an electrical event that produces what pattern in an ECG tracing?

Accepted Answer

A)   P wave
B)   PR interval
C)   QRS complex
D)   T wave
E)   PQ interval A

Question 4

Blood flow that travels from the heart to the lungs for gas exchange and then back to the heart describes the __________ circuit.

Accepted Answer

A)   cardiovascular
B)   parietal
C)   pulmonary
D)   systemic

Question 5

Hypotension may cause the net hydrostatic pressure in a capillary to decrease. What would be the effect on the net filtration pressure?

Accepted Answer

A)   A decrease in net filtration pressure
B)   An increase in net filtration pressure
C)   No change in net filtration pressure A

Question 6

In humans, circulation of the blood is a closed system.

Accepted Answer

A) True 
 B)False

Question 7

What is the function of plasma proteins in capillary exchange?

Accepted Answer

A)   To maintain the osmotic pressure of the blood
B)   To decrease the osmotic pressure of the blood
C)   To maintain the hydrostatic pressure of the blood
D)   To decrease the hydrostatic pressure of the blood
E)   To decrease the barometric pressure of the blood

Question 8

A patient is in the emergency department for a severe anxiety attack. Their doctor administers a dose of potassium to control their elevated heart rate. Why would potassium potentially be a treatment for the cardiovascular effects of an anxiety attack?

Accepted Answer

A)   Excess potassium-ion concentration inhibits signals from the sympathetic nervous system, thereby lowering the heart rate.
B)   Excess potassium-ion concentration acts of the heart to cause a decreased heart rate and increased force of contraction.
C)   Excess potassium-ion concentration acts on the heart to cause a decreased heart rate and a decreased force of contraction.
D)   Excess potassium-ion concentration signals the parasympathetic nervous system directly, thereby lowering the heart rate.

Question 9

Sympathetic branches of the autonomic nervous system stimulate smooth muscle in artery and arteriole walls to __________.

Accepted Answer

A)   expand
B)   relax
C)   contract
D)   dilate
E)   lengthen

Question 10

What is the pacemaker of the heart?

Accepted Answer

A)   Sinoatrial(S
A)   node
B)   Autonomic nervous system
C)   Atrioventricular(AV)  node
D)   Purkinje fibers

Question 11

Blood leaving the muscles near the thumb would first flow into the __________ vein.

Accepted Answer

The answer of Blood leaving the muscles near the thumb...

Question 12

Osmotic pressure forces molecules in the blood out through capillary walls.

Accepted Answer

A) True 
 B)False

Question 13

During ventricular contraction, what are the position of the valves?

Accepted Answer

A)   The atrioventricular valves are open.
B)   The atrioventricular valves are closed.
C)   The aortic valve is closed.
D)   The pulmonary valve is closed.

Question 14

Atrial repolarization produces the T waves seen in ECG tracings.

Accepted Answer

A) True 
 B)False

Question 15

To examine blood flow through an area more closely, a radiologist can inject contrast dye into an artery for an angiogram. If the dye was injected into the superior mesenteric artery, the radiologist is trying to examine blood flow through what area of the body?

Accepted Answer

A)   The neck and the facial muscles
B)   The intercostal muscles and chest area
C)   The arms and the hands
D)   The small intestine and portions of the large intestine

Question 16

What layer of a blood vessel wall is composed of simple squamous epithelium?

Accepted Answer

A)   Epicardium
B)   Tunica interna
C)   Tunica media
D)   Tunica externa
E)   Myocardium

Question 17

The descending aorta divides near the brim of the pelvis to form the right and left __________ arteries.

Accepted Answer

The answer of The descending aorta divides near the brim...

Question 18

In what part of the brain is the cardiac control center located?

Accepted Answer

A)   Medulla oblongata
B)   Cerebellum
C)   Pons
D)   Thalamus
E)   Hypothalamus

Question 19

Relaxation of the heart is called __________.

Accepted Answer

A)   systole
B)   diastole

Question 20

The outer layer of the heart wall is called the __________.

Accepted Answer

A)   epicardium
B)   myocardium
C)   parietal pericardium
D)   endocardium A

Exam 13: Cardiovascular System

Which of the following structures does not require stimulation from nerve fibers or other agents?

Correct AnswerverifiedShow Answer

What is the skeleton of the heart?

Correct AnswerverifiedShow Answer

Depolarization of the atria is an electrical event that produces what pattern in an ECG tracing?

Correct AnswerverifiedA

Blood flow that travels from the heart to the lungs for gas exchange and then back to the heart describes the __________ circuit.

Correct AnswerverifiedShow Answer

Hypotension may cause the net hydrostatic pressure in a capillary to decrease. What would be the effect on the net filtration pressure?

Correct AnswerverifiedA

In humans, circulation of the blood is a closed system.

Correct AnswerverifiedShow Answer

What is the function of plasma proteins in capillary exchange?

Correct AnswerverifiedShow Answer

A patient is in the emergency department for a severe anxiety attack. Their doctor administers a dose of potassium to control their elevated heart rate. Why would potassium potentially be a treatment for the cardiovascular effects of an anxiety attack?

Correct AnswerverifiedShow Answer

Sympathetic branches of the autonomic nervous system stimulate smooth muscle in artery and arteriole walls to __________.

Correct AnswerverifiedShow Answer

What is the pacemaker of the heart?

Correct AnswerverifiedShow Answer

Blood leaving the muscles near the thumb would first flow into the __________ vein.

Correct AnswerverifiedShow Answer

Osmotic pressure forces molecules in the blood out through capillary walls.

Correct AnswerverifiedShow Answer

During ventricular contraction, what are the position of the valves?

Correct AnswerverifiedShow Answer

Atrial repolarization produces the T waves seen in ECG tracings.

Correct AnswerverifiedShow Answer

To examine blood flow through an area more closely, a radiologist can inject contrast dye into an artery for an angiogram. If the dye was injected into the superior mesenteric artery, the radiologist is trying to examine blood flow through what area of the body?

Correct AnswerverifiedShow Answer

What layer of a blood vessel wall is composed of simple squamous epithelium?

Correct AnswerverifiedShow Answer

The descending aorta divides near the brim of the pelvis to form the right and left __________ arteries.

Correct AnswerverifiedShow Answer

In what part of the brain is the cardiac control center located?

Correct AnswerverifiedShow Answer

Relaxation of the heart is called __________.

Correct AnswerverifiedShow Answer

The outer layer of the heart wall is called the __________.

Correct AnswerverifiedA

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