Cardiovascular Physiology

Question 1

The “lub” sound indicates what?

Answer 1

The closing of the VA valves.

Question 2

The “Dub” sound indicates what?

Answer 2

The closing of the semilunar valves.

Question 3

The __________ contracts independently of the nervous system?

Answer 3

Myocardium

Question 4

______________ are gap junctions that connect cardiac muscle cells and allow it to beat and contract as one unit?

Answer 4

Intercalated discs

Question 5

Name 5 non-contractile cells within the heart that stimulate a synchronized heart rythum:

Answer 5

1. SA (Sinoatrial node)
2. AV (Atrioventricular node)
3. AV Bundle
4. Bundle branches
5. Purkinje Fibers

Question 6

Know as the “pacemaker of the heart.

Answer 6

SA (Sinoatrial) node

Question 7

Functions as a relay point that delays the contraction of the ventrical.

Answer 7

AV (atrioventicular) node

Question 8

Only place within the heart where there is a connection between atria and ventricles.

Answer 8

AV Bundle

Question 9

Extends through the interventricular septum.

Answer 9

Bundle branches

Question 10

Travel through the ventricular wall.

Answer 10

Purkinje Fibers

Question 11

Name 7 controls on heart rate:

Answer 11

1. Autonomic Nervous System (parasympathetic and sympathetic)
2. Hormones (epinephrine, thyroid hormone)
3. Electrolytes (Ca, Na, K)
4. Age
5. Gender
6. Fitness level
7. Body Temperature

Question 12

Records the electrical activity of the heart.

Answer 12

Electrocardiogram (ECG)

Question 13

ECG stands for what recording of electrical heart activity?

SPELL IT!

Answer 13

Electrocardiogram

Question 14

Ventricular contraction is known as __________?

Answer 14

Systole

Question 15

Ventricular relaxation is known as _________?

Answer 15

diastole

Question 16

Name the three wave of the cardiac cycle:

Answer 16

1. P wave
2. QRS complex
3. T wave

Question 17

What event occures during the P wave?

Answer 17

Atrial depolarization (contraction)

Question 18

What event occures during the QRS complex?

Answer 18

Ventricular depolarization (contraction)

Question 19

What event occurs during the T wave?

Answer 19

1. Ventricular repolarization (relaxation)