Question 1

Abnormally slow conduction through the ventricles would change the ________ in an ECG tracing.

Accepted Answer

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

Question 2

Epinephrine and norepinephrine increase ion flow through ________ channels.

Accepted Answer

A)  Na+ only 
B)  K+ only 
C)  Ca2+ only 
D)  If only 
E)  If and Ca2+ 
A)  Na+ only 
B)  K+ only 
C)  Ca2+ only 
D)  If only 
E)  If and Ca2+ E

Question 3

Match the following terms to the correct answer:
-an AV valve that has three flaps

Accepted Answer

A) tricuspid valve 
B) bicuspid valve 
C) aortic valve 
D) pulmonary valve 
A) tricuspid valve 
B) bicuspid valve 
C) aortic valve 
D) pulmonary valve A

Question 4

In electrocardiography,a lead is a(n)

Accepted Answer

A)  electrode. 
B)  pair of electrodes. 
C)  cable that attaches between the ECG machine and the body. 
A)  electrode. 
B)  pair of electrodes. 
C)  cable that attaches between the ECG machine and the body.

Question 5

The cardiovascular system is made up of ________,________,and ________.

Accepted Answer

the heart,blood vess

Question 6

The AV node is important because it

Accepted Answer

A)  directs electrical impulses from the ventricles to the atria. 
B)  delays the transmission of the electrical impulses to the ventricles in order for the atria to finish contracting. 
C)  serves as the pacemaker in a normal heart. 
D)  electrically opens the AV valves. 
E)  None of these answers are correct. 
A)  directs electrical impulses from the ventricles to the atria. 
B)  delays the transmission of the electrical impulses to the ventricles in order for the atria to finish contracting. 
C)  serves as the pacemaker in a normal heart. 
D)  electrically opens the AV valves. 
E)  None of these answers are correct.

Question 7

According to Starling's law of the heart,the cardiac output is directly related to the

Accepted Answer

A)  size of the ventricle. 
B)  heart rate. 
C)  venous return. 
D)  thickness of the myocardium. 
E)  end-systolic volume. 
A)  size of the ventricle. 
B)  heart rate. 
C)  venous return. 
D)  thickness of the myocardium. 
E)  end-systolic volume.

Question 8

Explain how Ca2+ levels inside myocardial cells are altered.

Accepted Answer

Calcium enters the cell through voltage-

Question 9

If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,

Accepted Answer

A)  the heart rate will increase. 
B)  the heart rate will decrease. 
C)  the membrane will depolarize. 
D)  the stroke volume will increase. 
E)  the intracellular concentration of calcium ion will increase. 
A)  the heart rate will increase. 
B)  the heart rate will decrease. 
C)  the membrane will depolarize. 
D)  the stroke volume will increase. 
E)  the intracellular concentration of calcium ion will increase.

Question 10

Which of the following events result in the first heart sound?

Accepted Answer

A)  The AV valves open. 
B)  The AV valves close. 
C)  The semilunar valves close. 
D)  The semilunar valves open. 
E)  The atria contract. 
A)  The AV valves open. 
B)  The AV valves close. 
C)  The semilunar valves close. 
D)  The semilunar valves open. 
E)  The atria contract.

Question 11

Which of the following conditions would have the greatest effect on peripheral resistance?

Accepted Answer

A)  doubling the length of a vessel 
B)  doubling the diameter of a vessel 
C)  doubling the viscosity of the blood 
D)  doubling the turbulence of the blood 
E)  doubling the number of white cells in the blood 
A)  doubling the length of a vessel 
B)  doubling the diameter of a vessel 
C)  doubling the viscosity of the blood 
D)  doubling the turbulence of the blood 
E)  doubling the number of white cells in the blood

Question 12

The ________ is a wall that separates the two sides of the heart.

Accepted Answer

The answer of The ________ is a wall that separates...

Question 13

The ________ directs blood from the ________ of the heart to the lungs.Backflow of blood to the heart is prevented by ________.Blood from the lungs returns to the heart via ________.

Accepted Answer

pulmonary trunk,righ

Question 14

Name the three portal systems in the body.

Accepted Answer

1.hepatic portal sys

Question 15

The ________ is the amount of blood in a ventricle at the beginning of systole.

Accepted Answer

end-diasto

Question 16

Acetylcholine slows the heart rate by

Accepted Answer

A)  just increasing ion influx, thus increasing the rate of depolarization. 
B)  just increasing the permeability to Ca2+. 
C)  just increasing the permeability to K+. 
D)  just decreasing the permeability to Ca2+. 
E)  increasing the permeability to K+ and decreasing the permeability to Ca2+. 
A)  just increasing ion influx, thus increasing the rate of depolarization. 
B)  just increasing the permeability to Ca2+. 
C)  just increasing the permeability to K+. 
D)  just decreasing the permeability to Ca2+. 
E)  increasing the permeability to K+ and decreasing the permeability to Ca2+.

Question 17

When a quantity is expressed as "4 cm/sec," what is being described is the

Accepted Answer

A)  flow rate. 
B)  velocity of flow. 
C)  pressure. 
D)  pressure gradient. 
E)  volume. 
A)  flow rate. 
B)  velocity of flow. 
C)  pressure. 
D)  pressure gradient. 
E)  volume.

Question 18

The most accurate definition of artery is a vessel that

Accepted Answer

A)  carries highly oxygenated blood. 
B)  contains smooth muscle in its wall. 
C)  transports blood away from the heart. 
D)  transports blood toward the heart. 
E)  contains internal valves. 
A)  carries highly oxygenated blood. 
B)  contains smooth muscle in its wall. 
C)  transports blood away from the heart. 
D)  transports blood toward the heart. 
E)  contains internal valves.

Question 19

At an intercalated disc,

Accepted Answer

A)  the cell membranes of two cardiac muscle fibers are completely separated by a synapse. 
B)  the myofibrils are loosely attached to the membrane of the disc. 
C)  two cardiac muscle cells are connected by gap junctions. 
D)  t-tubules unite the membranes of the adjoining cells. 
E)  All of the answers are correct. 
A)  the cell membranes of two cardiac muscle fibers are completely separated by a synapse. 
B)  the myofibrils are loosely attached to the membrane of the disc. 
C)  two cardiac muscle cells are connected by gap junctions. 
D)  t-tubules unite the membranes of the adjoining cells. 
E)  All of the answers are correct.

Question 20

The term that describes the volume of blood circulated by the heart in one minute is

Accepted Answer

A)  cardiac output (CO). 
B)  heart rate (HR). 
C)  end-diastolic volume (EDV). 
D)  stroke volume (SV). 
E)  end-systolic volume (ESV). 
A)  cardiac output (CO). 
B)  heart rate (HR). 
C)  end-diastolic volume (EDV). 
D)  stroke volume (SV). 
E)  end-systolic volume (ESV).

Exam 14: Cardiovascular Physiology

Abnormally slow conduction through the ventricles would change the ________ in an ECG tracing.

Epinephrine and norepinephrine increase ion flow through ________ channels.

Match the following terms to the correct answer: -an AV valve that has three flaps

In electrocardiography,a lead is a(n)

The cardiovascular system is made up of ________,________,and ________.

The AV node is important because it

According to Starling's law of the heart,the cardiac output is directly related to the

Explain how Ca2+ levels inside myocardial cells are altered.

If the membranes of the cardiac muscle cells in the SA node become more permeable to potassium ions,

Which of the following events result in the first heart sound?

Which of the following conditions would have the greatest effect on peripheral resistance?

The ________ is a wall that separates the two sides of the heart.

The ________ directs blood from the ________ of the heart to the lungs.Backflow of blood to the heart is prevented by ________.Blood from the lungs returns to the heart via ________.

Name the three portal systems in the body.

The ________ is the amount of blood in a ventricle at the beginning of systole.

Acetylcholine slows the heart rate by

When a quantity is expressed as "4 cm/sec," what is being described is the

The most accurate definition of artery is a vessel that

At an intercalated disc,

The term that describes the volume of blood circulated by the heart in one minute is

Introduction to Physiology

Molecular Interactions

Compartmentation: Cells and Tissues

Energy and Cellular Metabolism

Membrane Dynamics

Communication, Integration, and Homeostasis

Introduction to the Endocrine System

Neurons: Cellular and Network Properties

The Central Nervous System

Sensory Physiology

Efferent Division: Autonomic and Somatic Motor Control

Muscles

Integrative Physiology I: Control of Body Movement

Blood Flow and the Control of Blood Pressure

Blood

Mechanics of Breathing

Gas Exchange and Transport

The Kidneys

Integrative Physiology II: Fluid and Electrolyte Balance

The Digestive System

Metabolism and Energy Balance

Endocrine Control of Growth and Metabolism

The Immune System

Integrative Physiology III: Exercise

Reproduction and Development

Filters

The cardiovascular system is made up of ,,and .

Explain how Ca²⁺ levels inside myocardial cells are altered.

The directs blood from the of the heart to the lungs.Backflow of blood to the heart is prevented by .Blood from the lungs returns to the heart via .