Question 1

Drugs known as beta blockers will

Accepted Answer

A)  increase heart rate. 
B)  decrease heart rate. 
C)  increase stroke volume. 
D)  increase cardiac output. 
E)  decrease the end-systolic volume. 
A)  increase heart rate. 
B)  decrease heart rate. 
C)  increase stroke volume. 
D)  increase cardiac output. 
E)  decrease the end-systolic volume.

Question 2

A resting heart rate of less than 60 beats per minute is identified as ________.

Accepted Answer

The answer of A resting heart rate of less than...

Question 3

Using the appropriate equations,predict the effects in each scenario.
A.Vessels X and Y have the same diameter.X is 5 cm long and Y is 10 cm long.Which has the faster velocity of flow for the same fluid?
B.A blood vessel has a radius of 4 cm.Vasoconstriction reduces the radius to 1 cm.In order to maintain the same flow,by what factor must pressure increase?
C.The blood vessel in B above dilates from 1 cm to 4 cm.Does the flow rate increase or decrease?
D.A new subdivision is built between your house and the water storage tower.If the water company makes no adjustments,will the water pressure at your house change? If so,in which direction? Why?

Accepted Answer

A.Assuming the same driving pressure,the

Question 4

If channels are permeable to

Accepted Answer

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

Question 5

The volume of blood ejected from each ventricle during a contraction is called the

Accepted Answer

A)  end-diastolic volume. 
B)  end-systolic volume. 
C)  stroke volume. 
D)  cardiac output. 
E)  cardiac reserve. 
A)  end-diastolic volume. 
B)  end-systolic volume. 
C)  stroke volume. 
D)  cardiac output. 
E)  cardiac reserve.

Question 6

Which event happens at the start of a cardiac cycle?

Accepted Answer

A)  Blood is ejected from the atrium. 
B)  The SA node fires. 
C)  The P wave develops. 
D)  Ventricular systole occurs. 
E)  Atrial systole occurs. 
A)  Blood is ejected from the atrium. 
B)  The SA node fires. 
C)  The P wave develops. 
D)  Ventricular systole occurs. 
E)  Atrial systole occurs.

Question 7

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 8

Match the name of the wave with the correlated event.
-atrial depolarization

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 9

Match the name of the wave with the correlated event.
-atrial 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 10

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 11

Vern,suffering from cardiac arrhythmias,is brought into the emergency room of a hospital.He begins to exhibit tachycardia and as a result loses consciousness.His anxious wife asks you why he has lost consciousness.What would you tell her?

Accepted Answer

During tachycardia,the heart beats at an

Question 12

The action potentials of myocardial autorhythmic cells,are due to a combination of increasing Na2+ ________ and decreasing K+________.

Accepted Answer

A)  influx, efflux 
B)  efflux, influx 
C)  influx, influx 
D)  efflux, efflux 
A)  influx, efflux 
B)  efflux, influx 
C)  influx, influx 
D)  efflux, efflux

Question 13

If blood pressure doubled at the same time that the peripheral resistance doubled,the blood flow through a vessel would be

Accepted Answer

A)  doubled. 
B)  halved. 
C)  16 times greater. 
D)  1/16 as much. 
E)  unchanged. 
A)  doubled. 
B)  halved. 
C)  16 times greater. 
D)  1/16 as much. 
E)  unchanged.

Question 14

Match each term with its definition.
-the amount of blood left in the ventricle after it contracts

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 15

The contraction phase of the cardiac cycle is termed ________.

Accepted Answer

The answer of The contraction phase of the cardiac cycle...

Question 16

During the cardiac cycle,

Accepted Answer

A)  the P wave of the ECG occurs between the first and second heart sounds. 
B)  the QRS complex of the ECG precedes the increase in ventricular pressure. 
C)  the third heart sound occurs during atrial systole. 
D)  the second heart sound coincides with the QRS complex of the ECG. 
E)  the greatest increase in ventricular pressure occurs during the ejection phase. 
A)  the P wave of the ECG occurs between the first and second heart sounds. 
B)  the QRS complex of the ECG precedes the increase in ventricular pressure. 
C)  the third heart sound occurs during atrial systole. 
D)  the second heart sound coincides with the QRS complex of the ECG. 
E)  the greatest increase in ventricular pressure occurs during the ejection phase.

Question 17

Match the name of the wave with the correlated event.
-ventricular repolarization

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 18

As blood vessel length increases,

Accepted Answer

A)  resistance increases only. 
B)  flow decreases only. 
C)  friction decreases only. 
D)  resistance increases and flow decreases. 
E)  both resistance and flow increase. 
A)  resistance increases only. 
B)  flow decreases only. 
C)  friction decreases only. 
D)  resistance increases and flow decreases. 
E)  both resistance and flow increase.

Question 19

Explain why a heart can keep beating after it has been removed from a living body.

Accepted Answer

Heart tissue is auto

Question 20

Which statement is NOT true regarding cardiac muscle?

Accepted Answer

A)  Cardiac muscle cells must obey the all-or-none law of contraction. 
B)  Cardiac muscle cells rely on a sarcoplasmic reticulum for storage of Ca2+ ions. 
C)  Calcium-induced calcium release is the process by which extracellular Ca2+ triggers the release of stored Ca2+ from the sarcoplasmic reticulum. 
D)  Intercalated disks contain both desmosomes for firm attachment and gap junctions to allow communication. 
E)  The oxygen demand of cardiac muscle cells is high because they have many mitochondria. 
A)  Cardiac muscle cells must obey the all-or-none law of contraction. 
B)  Cardiac muscle cells rely on a sarcoplasmic reticulum for storage of Ca2+ ions. 
C)  Calcium-induced calcium release is the process by which extracellular Ca2+ triggers the release of stored Ca2+ from the sarcoplasmic reticulum. 
D)  Intercalated disks contain both desmosomes for firm attachment and gap junctions to allow communication. 
E)  The oxygen demand of cardiac muscle cells is high because they have many mitochondria.

Exam 14: Cardiovascular Physiology

Drugs known as beta blockers will

A resting heart rate of less than 60 beats per minute is identified as ________.

If channels are permeable to

The volume of blood ejected from each ventricle during a contraction is called the

Which event happens at the start of a cardiac cycle?

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?

Match the name of the wave with the correlated event. -atrial depolarization

Match the name of the wave with the correlated event. -atrial contraction

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

Vern,suffering from cardiac arrhythmias,is brought into the emergency room of a hospital.He begins to exhibit tachycardia and as a result loses consciousness.His anxious wife asks you why he has lost consciousness.What would you tell her?

The action potentials of myocardial autorhythmic cells,are due to a combination of increasing Na2+ ________ and decreasing K+________.

If blood pressure doubled at the same time that the peripheral resistance doubled,the blood flow through a vessel would be

Match each term with its definition. -the amount of blood left in the ventricle after it contracts

The contraction phase of the cardiac cycle is termed ________.

During the cardiac cycle,

Match the name of the wave with the correlated event. -ventricular repolarization

As blood vessel length increases,

Explain why a heart can keep beating after it has been removed from a living body.

Which statement is NOT true regarding cardiac 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

I_f channels are permeable to

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

The action potentials of myocardial autorhythmic cells,are due to a combination of increasing Na²⁺ and decreasing K⁺.