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Heart Physiology

Total questions: 24

Worksheet time: 18mins

Name
Class
Date
1.

True or False: Your heart needs a signal from your brain in order for it to keep its normal rhythm.

a)

True

b)

False

2.

Which of the following is referred to the pacemaker of the heart?

a)

Sinoatrial (SA) node

b)

Atrioventricular (AV) node

c)

Atrioventricular (AV) bundle

d)

Purkinje fibers

3.

What does an ECG or EKG record?

a)

the electrical changes in the myocardium

b)

the chemical changes in the medulla oblongata

c)

the amount of blood filling the ventricles

d)

the amount of blood filling the atria

4.

Which part of the intrinsic conduction system connects the atria to the ventricles, and when damaged can cause various degrees of heart block?

a)

atrioventricular (AV) node

b)

bundles of His

c)

Purkinje fibers

d)

sinoatrial (SA) node

5.

When blood pressure is taken, the number on the top is the pressure during systole. This correlates with which of the following?

a)

ventricular contraction

b)

ventricular relaxation

c)

atrial contraction

d)

atrial relaxation

6.

Which of the following correlate with the sounds of the cardiac cycle heard with a stethoscope?

a)

atrial contraction

b)

the opening of valves

c)

the closing of valves

d)

electrical impulse conduction

7.

When blood is traveling away from the heart, in which of the following would you find it?

a)

arteries

b)

capillaries

c)

venules

d)

veins

8.

When blood is traveling toward the heart, in which of the following would you find it?

a)

arteries

b)

capillaries

c)

arterioles

d)

veins

9.

Which of the following describes the P wave?

a)

atrial contraction

b)

ventricular contraction

c)

ventricular repolarization

d)

none of these

10.

Which of the following describes the T wave?

a)

atrial contraction

b)

ventricular contraction

c)

ventricular repolarization

d)

none of these

11.

Which of the following describes the QRS wave?

a)

atrial contraction

b)

ventricular contraction

c)

ventricular repolarization

d)

none of these

12.

What is the function of valves in the heart?

a)

promote contraction of ventricles

b)

prevent backflow of blood through the heart

c)

eliminate pressure variances within the heart

d)

allow oxygen to diffuse into the heart

13.
During atrial contraction and ventricular filling,
a)
the AV valves are open
b)
the semilunar valves are open
c)
the ventricles are contracted
d)
the atria are relaxed
14.
T/F: Heart murmurs are indicative of the valves of the heart not functioning properly: 
a)
True
b)
False
15.
The 'Lub' sound of the heart's LUB DUB? are the....
a)
Atrioventricular valves closing
b)
Semilunar Valves closing
c)
Blood flowing through the Pulmonary Trunk and Aorta
d)
Blood Flowing down into the venticles
16.
The 'Dub' sound of the heart's LUB DUB? are the....
a)
Atrioventricular valves closing
b)
Semilunar Valves closing
c)
Blood flowing through the Pulmonary Trunk and Aorta
d)
Blood Flowing down into the venticles
17.
Which contract in unison??
a)
Top chambers, then bottom chambers.
b)
Right Chambers, then the Left Chambers
c)
All four chambers beat in unison.
18.
An electrocardiogram measures what?
a)
The amount of pressure exerted on blood vessels.
b)
The electrical activity of the heart.
c)
How many times the heart contracts over time.
d)
The body's temperature caused by friction of blood in vessel.
19.
Why are the walls of the left ventricle thicker than that of the right ventricle?
a)
The left ventricle must force blood into all the capillaries of the lungs 
b)
the left ventricle doesn't skip leg day
c)
This is false, the walls of the right ventricle are thicker
d)
Blood from the left ventricle is pumped throught the entire body 
20.
What is the definition of the Cardiac Cycle?
a)
the contraction of the atria
b)
the sequence of events that occur during one complete heartbeat
c)
the contraction and relaxation of the ventricles
d)
the circulation of blood in the heart
21.
Which letter/s of the ECG shows the ventricles contracting.....
a)
P
b)
QRS
c)
ST
22.
During the systole phase of the cardiac cycle, the ventricles....
a)
Contract
b)
Relax
23.
What fibres allow the ventricles to contract?
a)

SA

b)

AV

c)

Purkinje

d)

Bundle branches

24.
Where in the heart could I find the SA Node?
a)
Right Atrium
b)
Left Atrium
c)
Right Ventricle
d)
Left Ventricle

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