Question 1

The inferior point of the heart is called the ________.

Accepted Answer

The answer of The inferior point of the heart is...

Question 2

The hepatic portal vein carries blood away from the

Accepted Answer

A)  digestive tract. 
B)  liver. 
C)  kidneys. 
D)  spleen. 
E)  pancreas. 
A)  digestive tract. 
B)  liver. 
C)  kidneys. 
D)  spleen. 
E)  pancreas.

Question 3

Match the name of the wave with the correlated event.
-immediately followed by ventricular contraction

Accepted Answer

A) P wave 
B) QRS complex 
C) T wave 
D) PR segment 
E) ST segment 
A) P wave 
B) QRS complex 
C) T wave 
D) PR segment 
E) ST segment

Question 4

The rule that states "Within limits,the heart pumps all of the blood that returns to it" is known as the ________.

Accepted Answer

Frank-Star

Question 5

In which situation would the stroke volume be the greatest?

Accepted Answer

A)  when venous return is increased 
B)  when venous return is decreased 
C)  when the force of contraction is decreased 
D)  when the difference between the end-diastolic volume and the end-systolic volume is small 
E)  when calcium channel blockers are present 
A)  when venous return is increased 
B)  when venous return is decreased 
C)  when the force of contraction is decreased 
D)  when the difference between the end-diastolic volume and the end-systolic volume is small 
E)  when calcium channel blockers are present

Question 6

As a result of the long refractory period,cardiac muscle cannot exhibit

Accepted Answer

A)  tonus. 
B)  treppe. 
C)  tetany. 
D)  recruitment. 
E)  fatigue. 
A)  tonus. 
B)  treppe. 
C)  tetany. 
D)  recruitment. 
E)  fatigue.

Question 7

The ________ circuit carries blood to and from all parts of the body except the alveoli of the lungs.

Accepted Answer

The answer of The ________ circuit carries blood to and...

Question 8

Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart.
1)bundle of His
2)internodal pathway
3)Purkinje fibers
4)atrioventricular node
5)sinoatrial nodes
6)left and right bundle branches

Accepted Answer

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

Question 9

Using the figure below (Fig.14.18 from your text),calculate the following values:   
A) Heart rate
B) Stroke volume
C) Cardiac output
D) Mean Arterial Pressure

Accepted Answer

A)(1 cycle/800 msec)× (1000 msec/sec)× (

Question 10

Capillaries are best described as

Accepted Answer

A)  microscopic vessels in which blood exchanges material with the interstitial fluid. 
B)  thick walled vessels that convey blood away from the heart. 
C)  thin walled vessels that convey blood toward the heart. 
D)  thick walled vessels that carry blood rich in oxygen. 
E)  thin walled vessels that carry blood deficient in oxygen. 
A)  microscopic vessels in which blood exchanges material with the interstitial fluid. 
B)  thick walled vessels that convey blood away from the heart. 
C)  thin walled vessels that convey blood toward the heart. 
D)  thick walled vessels that carry blood rich in oxygen. 
E)  thin walled vessels that carry blood deficient in oxygen.

Question 11

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 12

The medical term for heart attack is

Accepted Answer

A)  heart failure. 
B)  myocardial infarction. 
C)  heart murmur. 
D)  fibrillation. 
E)  heart block. 
A)  heart failure. 
B)  myocardial infarction. 
C)  heart murmur. 
D)  fibrillation. 
E)  heart block.

Question 13

Electrical shock to the heart is usually used to treat

Accepted Answer

A)  ventricular fibrillation. 
B)  atrial fibrillation. 
C)  heart block. 
D)  heart murmur. 
E)  myocardial infarction. 
A)  ventricular fibrillation. 
B)  atrial fibrillation. 
C)  heart block. 
D)  heart murmur. 
E)  myocardial infarction.

Question 14

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 15

If the connection between the AV node and bundle of His becomes blocked,

Accepted Answer

A)  the ventricles will beat faster. 
B)  the ventricles will beat more slowly. 
C)  the ventricular rate of contraction will not be affected. 
D)  the stroke volume will increase. 
E)  tachycardia will occur. 
A)  the ventricles will beat faster. 
B)  the ventricles will beat more slowly. 
C)  the ventricular rate of contraction will not be affected. 
D)  the stroke volume will increase. 
E)  tachycardia will occur.

Question 16

A person has a total blood volume of 5 L.Of this total,4 liters is contained in the systemic circulation and 1 L in the pulmonary circulation.If the person has a cardiac output of 5 L/min:
A.how long will it take for a drop of blood leaving the left ventricle to return to the heart?
B.how long will it take a drop of blood to go from the right ventricle to the left ventricle?

Accepted Answer

A.SV = 5 L/min,volume = 4 L,which would

Question 17

In the autorhythmic cells,the ________ channels open when the cell membrane potential is -60 mV.These channels are permeable to ________ and ________.

Accepted Answer

The answer of In the autorhythmic cells,the ________ channels open...

Question 18

The rising phase of the action potential is a result of ________ for skeletal muscle,________ for contractile myocardium,and ________ for autorhythmic myocardium.

Accepted Answer

Na⁺ entry,N

Question 19

A chronotropic agent is one that affects the heart rate.Compare and contrast this term with an inotropic agent.Give specific examples of each.

Accepted Answer

Inotropic agents affect contractility.Ca

Question 20

Manganese ions block the calcium channels in the cardiac muscle membrane.How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?

Accepted Answer

A)  The plateau phase of contraction would be longer. 
B)  The refractory period would be shorter. 
C)  The heart would beat less forcefully. 
D)  The heart rate would increase. 
E)  The contraction phase would be prolonged. 
A)  The plateau phase of contraction would be longer. 
B)  The refractory period would be shorter. 
C)  The heart would beat less forcefully. 
D)  The heart rate would increase. 
E)  The contraction phase would be prolonged.

Exam 14: Cardiovascular Physiology

The inferior point of the heart is called the ________.

The hepatic portal vein carries blood away from the

Match the name of the wave with the correlated event. -immediately followed by ventricular contraction

The rule that states "Within limits,the heart pumps all of the blood that returns to it" is known as the ________.

In which situation would the stroke volume be the greatest?

As a result of the long refractory period,cardiac muscle cannot exhibit

The ________ circuit carries blood to and from all parts of the body except the alveoli of the lungs.

Put these autorhythmic cells into the correct order for conveying electrical signals through a normal heart. 1)bundle of His 2)internodal pathway 3)Purkinje fibers 4)atrioventricular node 5)sinoatrial nodes 6)left and right bundle branches

Using the figure below (Fig.14.18 from your text),calculate the following values: A) Heart rate B) Stroke volume C) Cardiac output D) Mean Arterial Pressure

Capillaries are best described as

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.

The medical term for heart attack is

Electrical shock to the heart is usually used to treat

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

If the connection between the AV node and bundle of His becomes blocked,

In the autorhythmic cells,the ________ channels open when the cell membrane potential is -60 mV.These channels are permeable to ________ and ________.

The rising phase of the action potential is a result of ________ for skeletal muscle,________ for contractile myocardium,and ________ for autorhythmic myocardium.

A chronotropic agent is one that affects the heart rate.Compare and contrast this term with an inotropic agent.Give specific examples of each.

Manganese ions block the calcium channels in the cardiac muscle membrane.How would the presence of manganese in the extracellular fluid affect the contraction of the heart muscle?

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.

In the autorhythmic cells,the channels open when the cell membrane potential is -60 mV.These channels are permeable to and .

The rising phase of the action potential is a result of for skeletal muscle, for contractile myocardium,and for autorhythmic myocardium.