Question 1

ECGs

Accepted Answer

A)  provide direct information about the heart function. 
B)  are most useful in diagnosing heart murmurs. 
C)  show the summed electrical potentials generated by all cells of the heart. 
D)  have two major components: waves and nodes. 
E)  measure the mechanical activity of the heart. 
A)  provide direct information about the heart function. 
B)  are most useful in diagnosing heart murmurs. 
C)  show the summed electrical potentials generated by all cells of the heart. 
D)  have two major components: waves and nodes. 
E)  measure the mechanical activity of the heart.

Question 2

Ivabrandine selectively blocks If channels in the heart.Which statement would be True concerning a patient who is taking this drug?

Accepted Answer

A)  The drug would slow down this individual's heart rate. 
B)  This patient must have been suffering from bradycardia. 
C)  This drug would decrease contractility of the patient's heart. 
D)  This drug would raise the blood pressure of the patient. 
E)  The amount of calcium entering the patient's heart cells would increase. 
A)  The drug would slow down this individual's heart rate. 
B)  This patient must have been suffering from bradycardia. 
C)  This drug would decrease contractility of the patient's heart. 
D)  This drug would raise the blood pressure of the patient. 
E)  The amount of calcium entering the patient's heart cells would increase.

Question 3

Explain what a portal system is and give an example.How is a portal system different from the typical arrangement of vessels?

Accepted Answer

A portal system is a special circulation

Question 4

The cells responsible for establishing the rate of a cardiac contraction are the ________.

Accepted Answer

The answer of The cells responsible for establishing the rate...

Question 5

The primary function of the cardiovascular system is ________.

Accepted Answer

to transport materia

Question 6

Compare and contrast the effects of cholinergic and adrenergic fibers on the heart.Include a comparison of the various types of receptors they interact with, and their location on the heart.

Accepted Answer

See Figure

Question 7

The purpose of having valves in the cardiovascular system is to

Accepted Answer

A)  provide sounds so that heart health can be monitored. 
B)  ensure that blood flows in one direction. 
C)  prevent blood from flowing too quickly. 
D)  regulate blood pressure. 
E)  provide the force for circulation. 
A)  provide sounds so that heart health can be monitored. 
B)  ensure that blood flows in one direction. 
C)  prevent blood from flowing too quickly. 
D)  regulate blood pressure. 
E)  provide the force for circulation.

Question 8

What is a normal heart rate for healthy adults at rest, and what neural inputs contribute to the achievement of that range? How is heart rate affected when all nervous system input to the heart is blocked, and why is this effect seen?

Accepted Answer

A typical adult heart rate is 70 beats p

Question 9

The AV node delays the transmission of action potentials slightly to allow ________.

Accepted Answer

the atria to complet

Question 10

The flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of ________ K⁺ permeability and ________ Ca²⁺ permeability.

Accepted Answer

A)  increasing, increasing 
B)  decreasing, decreasing 
C)  increasing, decreasing 
D)  decreasing, increasing 
A)  increasing, increasing 
B)  decreasing, decreasing 
C)  increasing, decreasing 
D)  decreasing, increasing

Question 11

Name four questions related to heart function that you could answer by examining an ECG and one abnormal condition that may be indicated by each function.

Accepted Answer

1.What is the heart rate? Abnormal value

Question 12

Why is it necessary to direct the electrical signals in the heart through the AV node instead of allowing them to spread directly from the atria to the ventricles?

Accepted Answer

If electrical signals from the atria wer

Question 13

During the isovolumic phase of ventricular systole,

Accepted Answer

A)  the atria contract. 
B)  the atrioventricular valves and semilunar valves are closed. 
C)  blood is ejected into the great vessels. 
D)  the ventricles are relaxing. 
E)  the ventricles are filling with blood. 
A)  the atria contract. 
B)  the atrioventricular valves and semilunar valves are closed. 
C)  blood is ejected into the great vessels. 
D)  the ventricles are relaxing. 
E)  the ventricles are filling with blood.

Question 14

Match the change with the cardiovascular event described.
-If total cross-sectional area of blood vessels in an organ increases, what happens to velocity of blood through that organ?

Accepted Answer

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

Question 15

List and explain the three types of substances transported by the blood.What is the source of each type?

Accepted Answer

Nutrients, water, and gases from the ext

Question 16

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 17

Explain how Ca²⁺ levels inside myocardial cells are altered.

Accepted Answer

Calcium enters the cell through voltage-

Question 18

Place these structures in the order that blood returning to the heart from the body would pass through them.
1)right ventricle
2)left atrium
3)right atrium
4)pulmonary artery
5)left ventricle
6)pulmonary vein

Accepted Answer

A)  4, 2, 5, 6, 3, 1 
B)  2, 5, 6, 4, 3, 1 
C)  3, 1, 4, 6, 2, 5 
D)  1, 3, 6, 4, 5, 2 
E)  3, 2, 4, 6, 1, 5 
A)  4, 2, 5, 6, 3, 1 
B)  2, 5, 6, 4, 3, 1 
C)  3, 1, 4, 6, 2, 5 
D)  1, 3, 6, 4, 5, 2 
E)  3, 2, 4, 6, 1, 5

Question 19

Abnormal patterns of cardiac activity are known as ________.

Accepted Answer

The answer of Abnormal patterns of cardiac activity are known...

Question 20

Match the change with the cardiovascular event described.
-Joey develops a medical condition that decreases his blood viscosity.Assuming no other change (e.g., no compensatory reflex), what happens to his blood pressure?

Accepted Answer

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

Exam 14: Cardiovascular Physiology

ECGs

Ivabrandine selectively blocks If channels in the heart.Which statement would be True concerning a patient who is taking this drug?

Explain what a portal system is and give an example.How is a portal system different from the typical arrangement of vessels?

The cells responsible for establishing the rate of a cardiac contraction are the ________.

The primary function of the cardiovascular system is ________.

Compare and contrast the effects of cholinergic and adrenergic fibers on the heart.Include a comparison of the various types of receptors they interact with, and their location on the heart.

The purpose of having valves in the cardiovascular system is to

What is a normal heart rate for healthy adults at rest, and what neural inputs contribute to the achievement of that range? How is heart rate affected when all nervous system input to the heart is blocked, and why is this effect seen?

The AV node delays the transmission of action potentials slightly to allow ________.

The flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of ________ K⁺ permeability and ________ Ca²⁺ permeability.

Name four questions related to heart function that you could answer by examining an ECG and one abnormal condition that may be indicated by each function.

Why is it necessary to direct the electrical signals in the heart through the AV node instead of allowing them to spread directly from the atria to the ventricles?

During the isovolumic phase of ventricular systole,

Match the change with the cardiovascular event described. -If total cross-sectional area of blood vessels in an organ increases, what happens to velocity of blood through that organ?

List and explain the three types of substances transported by the blood.What is the source of each type?

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

Explain how Ca²⁺ levels inside myocardial cells are altered.

Place these structures in the order that blood returning to the heart from the body would pass through them. 1)right ventricle 2)left atrium 3)right atrium 4)pulmonary artery 5)left ventricle 6)pulmonary vein

Abnormal patterns of cardiac activity are known as ________.

Match the change with the cardiovascular event described. -Joey develops a medical condition that decreases his blood viscosity.Assuming no other change (e.g., no compensatory reflex), what happens to his blood pressure?

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 flattening of the action potentials of myocardial contractile cells, called the plateau phase, is due to a combination of K⁺ permeability and Ca²⁺ permeability.