The Cardiac Cycle Phase 2 - Isovolumetric Ventricular Contraction

The Cardiac Cycle Phase 2 - Isovolumetric Ventricular Contraction

Assessment

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Biology, Health Sciences

University

Hard

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The video explores the isovolumetric contraction phase of the cardiac cycle, where the ventricles contract without changing the blood volume. It explains the role of the EKG, particularly the QRS complex, in showing ventricular depolarization. The video also discusses the pressure dynamics within the heart, the closure of heart valves, and the resulting heart sounds. It concludes with a brief mention of the next phase, ejection.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary function of the right ventricle during the cardiac cycle?

To pump oxygenated blood to the body

To pump deoxygenated blood to the lungs

To receive blood from the lungs

To receive blood from the body

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the term 'isovolumetric' refer to in the context of isovolumetric contraction?

The constant blood pressure

The constant blood volume

The change in blood volume

The change in blood pressure

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which part of the EKG represents the depolarization of the ventricles?

P wave

T wave

QRS complex

U wave

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the left atrioventricular valve during isovolumetric contraction?

It bulges into the ventricles

It closes to prevent backflow

It remains open

It opens to allow blood flow

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the aortic valve remain closed during the initial phase of isovolumetric contraction?

Because the pressure in the aorta is higher than in the ventricle

Because the pressure in the ventricle is higher than in the aorta

Because the aortic valve is damaged

Because the ventricle is not contracting

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What causes the 'c wave' in atrial pressure during isovolumetric contraction?

The opening of the aortic valve

The closure of the atrioventricular valve

The contraction of the atria

The relaxation of the ventricles

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What sound is associated with the closure of the atrioventricular valves?

The 'lub' sound

The 'click' sound

The 'dub' sound

The 'whoosh' sound