Download Name:______ Per.______ Chapter 18: The Cardiovascular System

Name:___________________________ Per._______
Chapter 18: The Cardiovascular System: The Heart
Fill in the Blanks:
The contraction of the ventricles is referred to as _____________________
and the period of ventricular relaxation is called _______________________.
The two sounds describing the heart sounds during the cardiac cycle are
_____________________. The first heart sound is a result of closure of the
______________________valves; closure of the ___________________
valves causes the second heart sound. The heart chambers that have just been
filled when you hear the first heart sound are the ____________________.
Immediately after the second heart sound, the __________________ are filling
with blood and the __________________are empty. Abnormal heart sounds, or a
___________________, usually indicate valve problems.
Multiple Choice:
1. Which of the following depolarizes next after the AV node?
a. Atrial myocardium
b. Ventricular myocardium
c. Bundle branches
d. Purkinje fibers
2. A heart rate of 30 bpm (beats per minute) indicates that the
_________________ is functioning as an ectopic focus.
a. AV Node
b. Purkinje fibers
c. Bundle branches
d. AV Bundle
Name:___________________________ Per._______
3. Atrial repolarization coincides in time with the:
a. P wave
b. T wave
c. QRS complex
d. P-Q interval
4. A slow heartbeat that is below 60 bpm is known as
________________________.
a. Cardiac tamponade
b. Tachycardia
c. Cardiac ischemia
d. Bradycardia
5. A rapid heart rate that is over 100 bpm is known as
__________________________.
a. Tachycardia
b. Ectopic focus
c. Bradycardia
d. Hyperperfusion
6. Chest pain, resulting from ischemia (poor oxygenation) of the myocardium is
called ___________________________.
a. Heart block
b. Congestive heart failure
c. Angina pectoris
d. Fibrillation
7. A condition in which the heart is uncoordinated and useless as a pump is
called:
a. Incompetent valve
b. Fibrillation
c. Myocardial infarction
d. Tachyschemia
8. The cardiac conduction system is called the intrinsic conduction system
because:
a. It does not depend on the nervous system to function
b. It relies upon the nervous system to function
c. It has qualities that differentiate it from skeletal muscles
d. It sounds impressive
Name:___________________________ Per._______
Short Answer:
9. On the EKG tracing below, label the P, QRS and T waves and tell what they
represent
Wave
Heart Electrical Event
P
QRS
T
10. If you have a heart rate of 80 beats/min and a stroke volume of 100 mL
what is the cardiac output (show calculations) ? What will happen if the
heart rate doubles?
11. Correctly identify the pathway of the cardiac conduction system from start
to finish in one cardiac cycle.
Name:___________________________ Per._______
12. Consider the valves during the cardiac cycle. In the chart below, tell which
valves are open and which are closed during different activities:
Activity
Tricuspid
Valve
Pulmonary
Valve
Mitral Valve
Aortic Valve
Ventricle in
Systole
Ventricle in
Diastole
13. In the diagram of the heart below label the 4 chambers. Then label the tricuspid,
mitral, pulmonary and aortic valves. Next, label the blood vessels: aorta, superior
vena cava, inferior vena cava and pulmonary artery and veins. Finally draw red
arrows showing the direction that blood flows through the heart (start with the
vena cavae).