AR 4. Retrieval quiz  Fri 22 Nov

AR 4. Retrieval quiz Fri 22 Nov

12th Grade

12 Qs

quiz-placeholder

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AR 4. Retrieval quiz  Fri 22 Nov

AR 4. Retrieval quiz Fri 22 Nov

Assessment

Quiz

Biology

12th Grade

Hard

Created by

Helen Reid

Used 1+ times

FREE Resource

12 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following best describes the sequence of electrical conduction in the heart?

A) SA node → AV node → Purkinje fibers → Bundle of His

B) AV node → SA node → Bundle of His → Purkinje fibers

C) SA node → AV node → Bundle of His → Purkinje fibers

D) Purkinje fibers → Bundle of His → SA node → AV node

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is there a delay at the atrioventricular (AV) node during the cardiac impulse?

A) To ensure simultaneous contraction of the atria and ventricles

B) To allow the ventricles time to fully contract before the atria do

C) To ensure the atria have time to fully contract and empty blood into the ventricles

D) To prevent backward flow of blood into the atria

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the structure of the left ventricle support its function?

A) It has thin walls to store blood under low pressure

B) It has thicker muscular walls to generate higher pressure for systemic circulation

C) It contains valves that prevent backflow from the aorta into the left atrium

D) It has a smaller chamber to increase the speed of blood flow

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What physiological change occurs during the "lub-dub" sound of the heart?

A) The "lub" sound is caused by the closure of the semilunar valves, and the "dub" is from the closure of the atrioventricular valves.

B) The "lub" sound is caused by the opening of the atrioventricular valves, and the "dub" is from the opening of the semilunar valves.

C) The "lub" sound is caused by the closure of the atrioventricular valves, and the "dub" is from the closure of the semilunar valves.

D) Both sounds are caused by the contraction of the heart muscle.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which factor does NOT directly affect cardiac output?

A) Heart rate

B) Stroke volume

C) Peripheral resistance

D) Venous return

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is high blood pressure a risk factor for heart disease?

A) It decreases the oxygen supply to the heart muscle.

B) It leads to the weakening and damage of artery walls over time.

C) It increases the ability of the heart to pump blood efficiently.

D) It promotes greater flexibility of the arterial walls.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What mechanism helps venous blood return to the heart against gravity?

A) High pressure in the veins

B) The presence of one-way valves and muscle contractions

C) The suction effect of atrial systole

D) High oxygen levels in the blood

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