Quiz 2

Question 1

True or False.

Bradycardia is >60 beats/min

Answer 1

False

Question 2

True or False.

Tachycardia is defined as >100 beats/min

Answer 2

True

Question 3

True or False.

Systemic circulation involves the right side of the heart

Answer 3

False

Question 4

True or False.

Blood is taken to the lungs from the left ventricle

Answer 4

False

Question 5

True or False.

The SA node is the pacemaker of the heart and is found in the left atrium

Answer 5

False

Question 6

True or False.

Endothelial cells make up the epicardium

Answer 6

False

Question 7

True or False.

The thickest layer of the heart is the myocardium

Answer 7

True

Question 8

True or False.

The pulmonary arteries carry deoxygenated blood

Answer 8

True

Question 9

True or False.

The pulmonary veins carry oxygenated blood

Answer 9

True

Question 10

True or False.

The right AV valve is also called the mitral valve

Answer 10

False

Question 11

True or False.

The left AV valve is also called the bicuspid valve

Answer 11

True

Question 12

True or False.

Normal heart rate is 70-80 beats/min

Answer 12

True

Question 13

True or False.

Gap junctions keep cardiomyocytes from separating

Answer 13

False

Question 14

True or False.

At -60mV, sodium channels open rapidly

Answer 14

False

Question 15

True or False.

The RMP of the SA node is -60 volts

Answer 15

False

Question 16

True or False.

SA node RMP is unstable

Answer 16

True

Question 17

True or False.

Sympathetic stimulation decreases diastolic depolarization

Answer 17

False

Question 18

True or False.

Potassium channels close at -60mV

Answer 18

True

Question 19

True or False.

Pacemaker potential refers to “slow depolarization”

Answer 19

**False

Question 20

True or False.

A cardiac cycle is 8 seconds

Answer 20

False