Choose which of the following correctly orders the lining of the heart in order from innermost to outermost.

Endocardium, Myocardium, Epicardium

Pericardium, Endocardium, Epicardium

Endocardium, Epicardium, Myocardium

Repolarization of an autorhythmic cell is due to the opening of which channels?

voltage gated potassium channels

chemically gated calcium channels

chemically gated potassium channels

In order to cause cardiac muscle contraction, the contractile cells must also depolarize. What causes the depolarization of the contractile cells?

the flow of positive ions from adjacent cells

an unstable resting membrane potential in the contractile cells

the flow of negative ions from adjacent cells

Describe the pressures in the atria and ventricles that would cause the opening of the AV valves.

Pressure in the atria would be greater than the pressure in the ventricles.

Pressure in the ventricles would be greater than in the atria.

Pressures in the atria and ventricles would be equal.

What causes the aortic semilunar valve to close?

greater pressure in the aorta than in the left ventricle

equal ventricular and aortic pressures

higher ventricular pressure than aortic pressure

Put the phases of the cardiac cycle in the correct order, starting after ventricular filling.

isovolumetric contraction, ventricular ejection, isovolumetric relaxation

ventricular ejection, isovolumetric contraction, isovolumetric relaxation

ventricular ejection, ventricular relaxation, isovolumetric contraction

isovolumetric relaxation, ventricular ejection, isovolumetric contraction

The first sound 'lub' is caused by what?

The closure of the mitral and tricuspid valves.

The closure of the aortic and pulmonary valves.

The second sound 'dub' is caused by what?

The closure of the aortic and pulmonary valves

The closure of the mitral and tricuspid valves

Which of the following descriptions does describe atrioventricular (AV) valves?

anchored inferiorly by specialized connective tissue

open based on pressure changes in the atria versus the ventricles

Which statement regarding cardiac muscle structure is accurate?

Myofibrils of cardiac muscle tissue vary in diameter and branch extensively.

Cardiac cells possess fewer mitochondria than other types of muscle cells.

Cardiac cells are long, cylindrical, and multinucleate.

Cardiac muscle cells are independent of one another both structurally and functionally.

Select the characteristics of cardiac muscle that differ it from skeletal muscle.

Muscle strands are largely independent of eachother

The anatomy of the intrinsic conduction system causes contraction of the ventricles to begin at the apex and move superiorly. Why is this important?

so blood is forced upward, toward the semilunar valves

because the AV bundle is the only electrical connection between the atria and the ventricles

so the atria can finish contracting before the ventricles contract

because the Purkinje fibers conduct action potentials away from the heart apex

A&P II - Chapter 18 - The Heart

University

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57 Qs

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A&P II - Chapter 18 - The Heart

Quiz

•

Biology

•

University

•

Practice Problem

•

Hard

•

NGSS

HS-LS1-3

Standards-aligned

Ariane McCranie

Used 1+ times

FREE Resource

57 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the function of the coronary circulation?

Provide a blood supply to the lungs

Provide a blood supply to the heart

Provide a blood supply to the pericardium

Provide a blood supply to the aortic arch

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the ligamentum arteriosum?

A ligament attaching the aorta to the superior vena cava

A ligament securing the aorta

A remnant of the foramen ovale

A remnant of the ductus arteriosus

Answer explanation

The ligamentum arteriosum is a remnant of the ductus arteriosus. The ductus arteriosus is a fetal shunt that connects the pulmonary trunk to the aorta.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which chamber of the heart exits into the pulmonary trunk?

Right Atrium

Right Ventricle

Left Atrium

Left Ventricle

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Identify the ear like flaps that are attached to the top chambers of the heart.

Atrium

Coronary Sinus

Pectinate Muscles

Auricle

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The first branch off the arch of the aorta is the brachiocephalic
artery in both the sheep and the human.

True

False

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The base of the heart is located at the bottom of the heart.

True

False

Answer explanation

The base is located at the top of the heart. It is unusual to see the largest portion of an organ at the top. Typically, the base is at the bottom of an organ, as in the lungs.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The most muscular chamber of the heart is the right ventricle.

True

False

Answer explanation

The left ventricle is responsible for pumping blood out to the body. This requires a lot of force. The left ventricle is the most muscular in order to pump the blood with adequate force.

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A&P II - Chapter 18 - The Heart

57 questions

What is the function of the coronary circulation?

What is the ligamentum arteriosum?

The ligamentum arteriosum is a remnant of the ductus arteriosus. The ductus arteriosus is a fetal shunt that connects the pulmonary trunk to the aorta.

Which chamber of the heart exits into the pulmonary trunk?

Identify the ear like flaps that are attached to the top chambers of the heart.

The first branch off the arch of the aorta is the brachiocephalic
artery in both the sheep and the human.

The base of the heart is located at the bottom of the heart.

The base is located at the top of the heart. It is unusual to see the largest portion of an organ at the top. Typically, the base is at the bottom of an organ, as in the lungs.

The most muscular chamber of the heart is the right ventricle.

The left ventricle is responsible for pumping blood out to the body. This requires a lot of force. The left ventricle is the most muscular in order to pump the blood with adequate force.

Choose which of the following correctly orders the lining of the heart
in order from innermost to outermost.

Identify the valve found between the left atrium and left ventricle.

What heart chamber pushes blood through the aortic semilunar valve?

Create a free account and access millions of resources

Similar Resources on Wayground

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A&P II - Chapter 18 - The Heart

57 questions

What is the function of the coronary circulation?

What is the ligamentum arteriosum?

The ligamentum arteriosum is a remnant of the ductus arteriosus. The ductus arteriosus is a fetal shunt that connects the pulmonary trunk to the aorta.

Which chamber of the heart exits into the pulmonary trunk?

Identify the ear like flaps that are attached to the top chambers of the heart.

The first branch off the arch of the aorta is the brachiocephalic artery in both the sheep and the human.

The base of the heart is located at the bottom of the heart.

The base is located at the top of the heart. It is unusual to see the largest portion of an organ at the top. Typically, the base is at the bottom of an organ, as in the lungs.

The most muscular chamber of the heart is the right ventricle.

The left ventricle is responsible for pumping blood out to the body. This requires a lot of force. The left ventricle is the most muscular in order to pump the blood with adequate force.

Choose which of the following correctly orders the lining of the heart in order from innermost to outermost.

Identify the valve found between the left atrium and left ventricle.

What heart chamber pushes blood through the aortic semilunar valve?

Create a free account and access millions of resources

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Biology

The first branch off the arch of the aorta is the brachiocephalic
artery in both the sheep and the human.

Choose which of the following correctly orders the lining of the heart
in order from innermost to outermost.