Question 1

Spontaneous contractions of the heart muscle begin in the ________.

Accepted Answer

sinoatrial node

Question 2

Match each type of blood vessel to its description. Answers may be used more than once.
-Medium- and large-size vessels maintain a partial state of muscle contraction, resulting in high intravessel pressure.

Accepted Answer

A) vein, artery 
B) capillary 
C) vein 
D) artery 
A) vein, artery 
B) capillary 
C) vein 
D) artery D

Question 3

The aortic semilunar valve opens when the

Accepted Answer

A)  arterial pressure is lower than the ventricular pressure. 
B)  right ventricle is in diastole. 
C)  atrioventricular valves open. 
D)  atrium is in systole. 
E)  pulmonary semilunar valve closes. 
A)  arterial pressure is lower than the ventricular pressure. 
B)  right ventricle is in diastole. 
C)  atrioventricular valves open. 
D)  atrium is in systole. 
E)  pulmonary semilunar valve closes. A

Question 4

A cerebral embolism blocks an artery carrying blood to the ________.

Accepted Answer

The answer of A cerebral embolism blocks an artery carrying...

Question 5

Which one of the following best describes an angiogram?

Accepted Answer

A)  an x-ray picture of blood vessels 
B)  a recording of heart sounds 
C)  use of a balloon to widen an artery 
D)  a sensation of pain in the chest associated with poor blood circulation to the heart 
E)  a recording of the electrical activity of the heart 
A)  an x-ray picture of blood vessels 
B)  a recording of heart sounds 
C)  use of a balloon to widen an artery 
D)  a sensation of pain in the chest associated with poor blood circulation to the heart 
E)  a recording of the electrical activity of the heart

Question 6

The left ventricle has a more muscular wall than the other three chambers of the heart because the left ventricle

Accepted Answer

A)  must generate enough blood pressure to pump blood into the aorta and throughout the body. 
B)  pumps blood more rapidly than the other chambers. 
C)  pumps blood into the atria. 
D)  must decrease the amount of pressure on the blood so it can flow more smoothly. 
E)  receives blood directly from major arteries. 
A)  must generate enough blood pressure to pump blood into the aorta and throughout the body. 
B)  pumps blood more rapidly than the other chambers. 
C)  pumps blood into the atria. 
D)  must decrease the amount of pressure on the blood so it can flow more smoothly. 
E)  receives blood directly from major arteries.

Question 7

The electrical signal causing contraction of the heart is carried from the atrioventricular bundle to the myocardium of the ventricles by ________ fibers.

Accepted Answer

The answer of The electrical signal causing contraction of the...

Question 8

Which one of the following statements is TRUE regarding arterioles and arteries?

Accepted Answer

A)  Arterioles and arteries transport blood from capillaries to veins. 
B)  Blood pressure in arterioles is greater than the blood pressure in arteries. 
C)  Arterioles are smaller and have less smooth muscle than arteries. 
D)  Arteries do not contain valves, whereas arterioles do. 
E)  Small sphincter muscles regulate the flow of blood from arteries into arterioles. 
A)  Arterioles and arteries transport blood from capillaries to veins. 
B)  Blood pressure in arterioles is greater than the blood pressure in arteries. 
C)  Arterioles are smaller and have less smooth muscle than arteries. 
D)  Arteries do not contain valves, whereas arterioles do. 
E)  Small sphincter muscles regulate the flow of blood from arteries into arterioles.

Question 9

Fluid that "escapes" from the circulatory system due to high pressure is referred to as

Accepted Answer

A)  digestive fluid. 
B)  interstitial fluid. 
C)  formed elements. 
D)  platelets. 
E)  aneurysm. 
A)  digestive fluid. 
B)  interstitial fluid. 
C)  formed elements. 
D)  platelets. 
E)  aneurysm.

Question 10

Which one of the following is TRUE regarding baroreceptors?

Accepted Answer

A)  Baroreceptors are pressure sensors that monitor blood pressure. 
B)  Baroreceptors are located in the right atrium and right ventricle. 
C)  Baroreceptors respond to high blood pressure by causing an increase in heart contraction. 
D)  Baroreceptors respond to low blood pressure by causing vasodilation of the arterioles. 
E)  Baroreceptors send nerve impulses directly to the heart. 
A)  Baroreceptors are pressure sensors that monitor blood pressure. 
B)  Baroreceptors are located in the right atrium and right ventricle. 
C)  Baroreceptors respond to high blood pressure by causing an increase in heart contraction. 
D)  Baroreceptors respond to low blood pressure by causing vasodilation of the arterioles. 
E)  Baroreceptors send nerve impulses directly to the heart.

Question 11

Blood pressure is measured with a(n) ________ and a stethoscope.

Accepted Answer

The answer of Blood pressure is measured with a(n) ________...

Question 12

Risk factors for atherosclerosis include factors that can raise the levels of blood cholesterol, such as

Accepted Answer

A)  obesity, smoking, and a sedentary lifestyle. 
B)  regular exercise and a high-fat diet. 
C)  dieting and REM sleep. 
D)  sedentary lifestyle, low-fat diet. 
E)  maintaining homeostatic blood pressure. 
A)  obesity, smoking, and a sedentary lifestyle. 
B)  regular exercise and a high-fat diet. 
C)  dieting and REM sleep. 
D)  sedentary lifestyle, low-fat diet. 
E)  maintaining homeostatic blood pressure.

Question 13

Match each type of blood vessel to its description. Answers may be used more than once.
-This blood vessel transports blood from the heart to the capillaries.

Accepted Answer

A) vein, artery 
B) capillary 
C) vein 
D) artery 
A) vein, artery 
B) capillary 
C) vein 
D) artery

Question 14

Veins carry blood away from the heart.

Accepted Answer

A) True 
 B)False

Question 15

Deoxygenated blood always flows

Accepted Answer

A)  into the left ventricle. 
B)  toward the left atrium. 
C)  toward the right atrium. 
D)  in the systemic circuit. 
E)  from capillaries to arterioles. 
A)  into the left ventricle. 
B)  toward the left atrium. 
C)  toward the right atrium. 
D)  in the systemic circuit. 
E)  from capillaries to arterioles.

Question 16

Match each type of blood vessel to its description. Answers may be used more than once.
-This blood vessel permits exchange of nutrients and gases between blood and tissues.

Accepted Answer

A) vein, artery 
B) capillary 
C) vein 
D) artery 
A) vein, artery 
B) capillary 
C) vein 
D) artery

Question 17

The atrioventricular valves are closed when the heart is in complete diastole.

Accepted Answer

A) True 
 B)False

Question 18

Ventricular fibrillation is occurring in a patient who has just arrived in the emergency room. Which one of the following treatments may be applied immediately to correct this potentially fatal arrhythmia?

Accepted Answer

A)  implantation of an artificial pacemaker 
B)  coronary artery bypass surgery 
C)  cardioversion 
D)  balloon angioplasty 
E)  replacement of the defective heart valve 
A)  implantation of an artificial pacemaker 
B)  coronary artery bypass surgery 
C)  cardioversion 
D)  balloon angioplasty 
E)  replacement of the defective heart valve

Question 19

CABG is a procedure used to restore the flow of blood through the ________ arteries.

Accepted Answer

The answer of CABG is a procedure used to restore...

Question 20

A person's blood pressure has fallen below normal as the person has quickly jumped out of his or her chair where he or she had been relaxing. All of the following reflect events in restoring the blood pressure to normal EXCEPT which one?

Accepted Answer

A)  The heart rate will decrease. 
B)  The baroreceptors will detect the drop in blood pressure. 
C)  The medulla oblongata will send signals to the heart and to the blood vessels. 
D)  The force of contraction of the heart will increase. 
E)  Vasoconstriction of a number of arterioles will increase blood pressure. 
A)  The heart rate will decrease. 
B)  The baroreceptors will detect the drop in blood pressure. 
C)  The medulla oblongata will send signals to the heart and to the blood vessels. 
D)  The force of contraction of the heart will increase. 
E)  Vasoconstriction of a number of arterioles will increase blood pressure.

Exam 8: Heart and Blood Vessels

Spontaneous contractions of the heart muscle begin in the ________.

Match each type of blood vessel to its description. Answers may be used more than once. -Medium- and large-size vessels maintain a partial state of muscle contraction, resulting in high intravessel pressure.

The aortic semilunar valve opens when the

A cerebral embolism blocks an artery carrying blood to the ________.

Which one of the following best describes an angiogram?

The left ventricle has a more muscular wall than the other three chambers of the heart because the left ventricle

The electrical signal causing contraction of the heart is carried from the atrioventricular bundle to the myocardium of the ventricles by ________ fibers.

Which one of the following statements is TRUE regarding arterioles and arteries?

Fluid that "escapes" from the circulatory system due to high pressure is referred to as

Which one of the following is TRUE regarding baroreceptors?

Blood pressure is measured with a(n) ________ and a stethoscope.

Risk factors for atherosclerosis include factors that can raise the levels of blood cholesterol, such as

Match each type of blood vessel to its description. Answers may be used more than once. -This blood vessel transports blood from the heart to the capillaries.

Veins carry blood away from the heart.

Deoxygenated blood always flows

Match each type of blood vessel to its description. Answers may be used more than once. -This blood vessel permits exchange of nutrients and gases between blood and tissues.

The atrioventricular valves are closed when the heart is in complete diastole.

Ventricular fibrillation is occurring in a patient who has just arrived in the emergency room. Which one of the following treatments may be applied immediately to correct this potentially fatal arrhythmia?

CABG is a procedure used to restore the flow of blood through the ________ arteries.

A person's blood pressure has fallen below normal as the person has quickly jumped out of his or her chair where he or she had been relaxing. All of the following reflect events in restoring the blood pressure to normal EXCEPT which one?

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