Question 1

Which of the following is INCORRECT about cardiac muscle cells?

Accepted Answer

A)  All of them contract in the heart or none of them contract. 
B)  They are capable of graded strength of contraction. 
C)  They are produced constantly after infancy. 
D)  They have an abundance of mitochondria. 
A)  All of them contract in the heart or none of them contract. 
B)  They are capable of graded strength of contraction. 
C)  They are produced constantly after infancy. 
D)  They have an abundance of mitochondria.

Question 2

Cardiac output is stroke volume times the heart rate.

Accepted Answer

A) True 
 B)False

Question 3

Indicate which valve abnormality is being described by using the answer code (options may be used more than once or not at all):
-produces a "whistling" murmur

Accepted Answer

A) valvular stenosis 
B) valvular insufficiency 
A) valvular stenosis 
B) valvular insufficiency

Question 4

If stroke volume is 80 mL and the heart rate is 70 beats per minute,what is the cardiac output?

Accepted Answer

A)  150 mL/min. 
B)  560 mL/min. 
C)  5,600 mL/min. 
D)  8,700 mL/min. 
A)  150 mL/min. 
B)  560 mL/min. 
C)  5,600 mL/min. 
D)  8,700 mL/min.

Question 5

Which molecule(s)induce vasodilation of coronary arteries?

Accepted Answer

A)  oxygen 
B)  adenosine diphosphate 
C)  nitric oxide 
D)  carbon dioxide 
A)  oxygen 
B)  adenosine diphosphate 
C)  nitric oxide 
D)  carbon dioxide

Question 6

Indicate which ion is involved in each event being described by using the answer code (options may be used more than once or not at all):
-Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

Accepted Answer

A) K+ 
B) Na+ 
C) Ca2+ 
A) K+ 
B) Na+ 
C) Ca2+

Question 7

An increase in the parasympathetic activity ____________________ the AV-nodal delay.

Accepted Answer

The answer of An increase in the parasympathetic activity ____________________...

Question 8

An increase in cardiac sympathetic activity ____________________ the permeability of the SA node to K ions.

Accepted Answer

The answer of An increase in cardiac sympathetic activity ____________________...

Question 9

Which action is done by the semilunar valves?

Accepted Answer

A)  preventing backflow of blood from the ventricles to the atria 
B)  preventing backflow of blood from the atria to the ventricles 
C)  preventing backflow of blood from the ventricles to the arterial trunks 
D)  preventing backflow of blood from the arterial trunks to the ventricles 
A)  preventing backflow of blood from the ventricles to the atria 
B)  preventing backflow of blood from the atria to the ventricles 
C)  preventing backflow of blood from the ventricles to the arterial trunks 
D)  preventing backflow of blood from the arterial trunks to the ventricles

Question 10

What causes the dicrotic notch on the aortic pressure curve?

Accepted Answer

A)  a disturbance set up during closure of the aortic valve 
B)  a disturbance set up during closure of the left atrioventricular valve 
C)  elastic recoil of the arterial walls during ventricular diastole 
D)  turbulent flow through a stenotic valve 
A)  a disturbance set up during closure of the aortic valve 
B)  a disturbance set up during closure of the left atrioventricular valve 
C)  elastic recoil of the arterial walls during ventricular diastole 
D)  turbulent flow through a stenotic valve

Question 11

Which statement is correct for cardiac fibrillation?

Accepted Answer

A)  backflow of blood throughout the heart 
B)  coordinated function of nodal cells 
C)  failure of the heart valves and blood vessels to function 
D)  uncoordinated excitation and contraction of cardiac cells 
A)  backflow of blood throughout the heart 
B)  coordinated function of nodal cells 
C)  failure of the heart valves and blood vessels to function 
D)  uncoordinated excitation and contraction of cardiac cells

Question 12

Normally,the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

Accepted Answer

A) True 
 B)False

Question 13

MATCHING
Match the term with the correct characteristic by using the answer code:
-prevents backflow of blood

Accepted Answer

A) gap junction 
B) HDL 
C) functional syncytium 
D) heart valve 
E) pericardial sac
F)LDL
G)adenosine 
A) gap junction 
B) HDL 
C) functional syncytium 
D) heart valve 
E) pericardial sac
F)LDL
G)adenosine

Question 14

HDLs have less protein than LDLs.

Accepted Answer

A) True 
 B)False

Question 15

The extent of myocardial infarction is dependent on ____________________ and ____________________.

Accepted Answer

the size of the occluded vesse

Question 16

If the cardiac output is 4,800 mL/min and the heart rate is 60 beats per minute,how many millilitres does the stroke volume average?

Accepted Answer

A)  60 
B)  70 
C)  80 
D)  120 
A)  60 
B)  70 
C)  80 
D)  120

Question 17

The functional syncytia of the myocardium are offered by the intercalated discs.

Accepted Answer

A) True 
 B)False

Question 18

Which statement is INCORRECT regarding fetal circulation?

Accepted Answer

A)  The foramen ovale interconnects the atria. 
B)  The ligamentum arteriosum shunts blood from the pulmonary artery directly into the aorta. 
C)  The fetus has two lung bypasses. 
D)  The umbilical vein carries oxygen-rich blood to the fetus. 
A)  The foramen ovale interconnects the atria. 
B)  The ligamentum arteriosum shunts blood from the pulmonary artery directly into the aorta. 
C)  The fetus has two lung bypasses. 
D)  The umbilical vein carries oxygen-rich blood to the fetus.

Question 19

What does the QRS complex represent?

Accepted Answer

A)  depolarization of the atria 
B)  depolarization of the ventricles 
C)  the AV nodal delay 
D)  repolarization of the ventricles 
A)  depolarization of the atria 
B)  depolarization of the ventricles 
C)  the AV nodal delay 
D)  repolarization of the ventricles

Question 20

Parasympathetic innervation to the heart _______________________

Accepted Answer

A)  is the spinal nerve 
B)  decreases the rate at which spontaneous action potentials are initiated in the SA node 
C)  decreases the strength of ventricular contraction 
D)  increases the heart rate 
A)  is the spinal nerve 
B)  decreases the rate at which spontaneous action potentials are initiated in the SA node 
C)  decreases the strength of ventricular contraction 
D)  increases the heart rate

Which of the following is INCORRECT about cardiac muscle cells?

Cardiac output is stroke volume times the heart rate.

Indicate which valve abnormality is being described by using the answer code (options may be used more than once or not at all): -produces a "whistling" murmur

If stroke volume is 80 mL and the heart rate is 70 beats per minute,what is the cardiac output?

Which molecule(s)induce vasodilation of coronary arteries?

Indicate which ion is involved in each event being described by using the answer code (options may be used more than once or not at all): -Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

An increase in the parasympathetic activity ____________________ the AV-nodal delay.

An increase in cardiac sympathetic activity ____________________ the permeability of the SA node to K ions.

Which action is done by the semilunar valves?

What causes the dicrotic notch on the aortic pressure curve?

Which statement is correct for cardiac fibrillation?

Normally,the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

MATCHING Match the term with the correct characteristic by using the answer code: -prevents backflow of blood

HDLs have less protein than LDLs.

The extent of myocardial infarction is dependent on and .

If the cardiac output is 4,800 mL/min and the heart rate is 60 beats per minute,how many millilitres does the stroke volume average?

The functional syncytia of the myocardium are offered by the intercalated discs.

Which statement is INCORRECT regarding fetal circulation?

What does the QRS complex represent?

Parasympathetic innervation to the heart _______________________

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Muscle Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

Filters

Exam 7: Cardiac Physiology

Which of the following is INCORRECT about cardiac muscle cells?

Cardiac output is stroke volume times the heart rate.

Indicate which valve abnormality is being described by using the answer code (options may be used more than once or not at all): -produces a "whistling" murmur

If stroke volume is 80 mL and the heart rate is 70 beats per minute,what is the cardiac output?

Which molecule(s)induce vasodilation of coronary arteries?

Indicate which ion is involved in each event being described by using the answer code (options may be used more than once or not at all): -Slow inward diffusion of _____ is largely responsible for the plateau portion of the cardiac action potential.

An increase in the parasympathetic activity ____________________ the AV-nodal delay.

An increase in cardiac sympathetic activity ____________________ the permeability of the SA node to K ions.

Which action is done by the semilunar valves?

What causes the dicrotic notch on the aortic pressure curve?

Which statement is correct for cardiac fibrillation?

Normally,the stroke volume of the right side of the heart is the same as the stroke volume of the left side of the heart.

MATCHING Match the term with the correct characteristic by using the answer code: -prevents backflow of blood

HDLs have less protein than LDLs.

The extent of myocardial infarction is dependent on ____________________ and ____________________.

If the cardiac output is 4,800 mL/min and the heart rate is 60 beats per minute,how many millilitres does the stroke volume average?

The functional syncytia of the myocardium are offered by the intercalated discs.

Which statement is INCORRECT regarding fetal circulation?

What does the QRS complex represent?

Parasympathetic innervation to the heart _______________________

The Foundation of Physiology

Cell Physiology

The Central Nervous System

The Peripheral Nervous System

Principals of Endocrinology; The Central Endocrine Glands

Muscle Physiology

Vascular Physiology

The Blood

Body Defences

The Respiratory System

The Urinary System

Fluid and Acid Base Balance

The Digestive System

Energy Balance and Temperature Regulation

The Endocrine Glands

The Reproductive System

Filters

The extent of myocardial infarction is dependent on and .