Question 1

What are the primary components of a cardiovascular system? What diffusion-related problem is solved by having a cardiovascular system?

Accepted Answer

Primary components are the heart (a pump

Question 2

The period of time from the beginning of one heartbeat to the beginning of the next is termed the ________.

Accepted Answer

The answer of The period of time from the beginning...

Question 3

The P wave of an ECG corresponds to

Accepted Answer

A)  the depolarization of the atria. 
B)  the progressive wave of ventricular depolarization. 
C)  the repolarization of the ventricles. 
D)  atrial repolarization. 
E)  None of the answers are correct. 
A)  the depolarization of the atria. 
B)  the progressive wave of ventricular depolarization. 
C)  the repolarization of the ventricles. 
D)  atrial repolarization. 
E)  None of the answers are correct.

Question 4

Match each term with its definition.
-the amount of blood pumped out of the heart during one contraction

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)

Question 5

The heart is encased in a tough membranous sac called the ________.The heart is composed mostly of ________ muscle tissue,called the ________.

Accepted Answer

pericardiu

Question 6

The fibrous skeleton of the heart is important because it

Accepted Answer

A)  forces electrical activity to be conducted through the atrioventricular node. 
B)  transmits electrical activity from the atria to the ventricles. 
C)  helps guide the blood into the proper chambers in sequence. 
D)  directs the flow of blood into the arteries. 
A)  forces electrical activity to be conducted through the atrioventricular node. 
B)  transmits electrical activity from the atria to the ventricles. 
C)  helps guide the blood into the proper chambers in sequence. 
D)  directs the flow of blood into the arteries.

Question 7

Which of the following will increase flow in a vessel the most?

Accepted Answer

A)  decrease length by 1 unit 
B)  increase radius by 1 unit 
C)  decrease viscosity by 1 unit 
D)  All have the same effect on flow. 
A)  decrease length by 1 unit 
B)  increase radius by 1 unit 
C)  decrease viscosity by 1 unit 
D)  All have the same effect on flow.

Question 8

________ are blood vessels that carry blood away from the heart.

Accepted Answer

The answer of ________ are blood vessels that carry blood...

Question 9

Listening to the heart through the chest wall is called ________.

Accepted Answer

The answer of Listening to the heart through the chest...

Question 10

Ventricular contraction

Accepted Answer

A)  begins during the first part of the P wave. 
B)  begins just after the T wave. 
C)  begins just after the Q wave. 
D)  begins during the latter part of the P wave. 
E)  None of the answers are correct. 
A)  begins during the first part of the P wave. 
B)  begins just after the T wave. 
C)  begins just after the Q wave. 
D)  begins during the latter part of the P wave. 
E)  None of the answers are correct.

Question 11

The pressure created in the ventricles is called the ________ pressure because ________.

Accepted Answer

driving,it is the fo

Question 12

Autorhythmic cells

Accepted Answer

A)  are also called pacemakers because they set the rate of the heartbeat. 
B)  are the same size as myocardial contractile cells. 
C)  have organized sarcomeres. 
D)  contribute to the force of contraction. 
E)  None of the answers are correct. 
A)  are also called pacemakers because they set the rate of the heartbeat. 
B)  are the same size as myocardial contractile cells. 
C)  have organized sarcomeres. 
D)  contribute to the force of contraction. 
E)  None of the answers are correct.

Question 13

Explain what is meant by the terms respiratory pump and skeletal muscle pump.Why are these important to the cardiovascular system?

Accepted Answer

Both refer to pressure exerted on the bl

Question 14

In order for blood to enter the heart,

Accepted Answer

A)  the atria must be in diastole. 
B)  the pressure in the atria must be lower than in the veins. 
C)  the AV valves must be open. 
D)  the atria must not only be at rest but the atrial pressure must be lower than the veins. 
E)  All of the answers are correct. 
A)  the atria must be in diastole. 
B)  the pressure in the atria must be lower than in the veins. 
C)  the AV valves must be open. 
D)  the atria must not only be at rest but the atrial pressure must be lower than the veins. 
E)  All of the answers are correct.

Question 15

Match the change with the cardiovascular event described.
-When a blood vessel dilates,velocity of blood is ________.

Accepted Answer

A) increased 
B) decreased 
C) unchanged 
D) stopped 
A) increased 
B) decreased 
C) unchanged 
D) stopped

Question 16

During ventricular systole,

Accepted Answer

A)  the atria are contracting. 
B)  blood is entering the ventricles. 
C)  the AV valves are closed. 
D)  the pressure in the ventricles declines. 
E)  the ventricles are relaxed. 
A)  the atria are contracting. 
B)  blood is entering the ventricles. 
C)  the AV valves are closed. 
D)  the pressure in the ventricles declines. 
E)  the ventricles are relaxed.

Question 17

The superior portion of the heart where the major blood vessels enter and exit is the ________.

Accepted Answer

The answer of The superior portion of the heart where...

Question 18

A certain drug decreases heart rate by producing hyperpolarization in the pacemaker cells of the heart.This drug probably binds to

Accepted Answer

A)  nicotinic receptors. 
B)  muscarinic receptors. 
C)  alpha adrenergic receptors. 
D)  beta receptors. 
A)  nicotinic receptors. 
B)  muscarinic receptors. 
C)  alpha adrenergic receptors. 
D)  beta receptors.

Question 19

Which valves have chordae tendineae?

Accepted Answer

A)  aortic and pulmonary valves 
B)  bicuspid (mitral) and tricuspid valves 
C)  valves in veins 
D)  semilunar valves 
E)  coronary valves 
A)  aortic and pulmonary valves 
B)  bicuspid (mitral) and tricuspid valves 
C)  valves in veins 
D)  semilunar valves 
E)  coronary valves

Question 20

When the heart is in fibrillation,

Accepted Answer

A)  the myocardial cells may become damaged from contracting too fast. 
B)  the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells. 
C)  effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen. 
D)  the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute. 
E)  there is no contraction of the myocardium. 
A)  the myocardial cells may become damaged from contracting too fast. 
B)  the myocardial cells deplete their oxygen supply because they are contracting too fast, and the lactic acid produced damages the myocardial cells. 
C)  effective pumping of the ventricles ceases because the myocardial cells fail to work as a team, and the brain cannot get adequate oxygen. 
D)  the myocardial cells are contracting together as they should; fibrillation indicates a normal sinus rhythm of 75 beats per minute. 
E)  there is no contraction of the myocardium.

Exam 14: Cardiovascular Physiology

What are the primary components of a cardiovascular system? What diffusion-related problem is solved by having a cardiovascular system?

The period of time from the beginning of one heartbeat to the beginning of the next is termed the ________.

The P wave of an ECG corresponds to

Match each term with its definition. -the amount of blood pumped out of the heart during one contraction

The heart is encased in a tough membranous sac called the ________.The heart is composed mostly of ________ muscle tissue,called the ________.

The fibrous skeleton of the heart is important because it

Which of the following will increase flow in a vessel the most?

________ are blood vessels that carry blood away from the heart.

Listening to the heart through the chest wall is called ________.

Ventricular contraction

The pressure created in the ventricles is called the ________ pressure because ________.

Autorhythmic cells

Explain what is meant by the terms respiratory pump and skeletal muscle pump.Why are these important to the cardiovascular system?

In order for blood to enter the heart,

Match the change with the cardiovascular event described. -When a blood vessel dilates,velocity of blood is ________.

During ventricular systole,

The superior portion of the heart where the major blood vessels enter and exit is the ________.

A certain drug decreases heart rate by producing hyperpolarization in the pacemaker cells of the heart.This drug probably binds to

Which valves have chordae tendineae?

When the heart is in fibrillation,

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 heart is encased in a tough membranous sac called the .The heart is composed mostly of muscle tissue,called the .

The pressure created in the ventricles is called the pressure because .