Ch 19

Question 1

What tissue comprises the heart valves

Answer 1

Endocardium with a connective tissue core

Question 2

Where are atrioventricular valves found in the heart

Answer 2

Between Atria and ventricles

Question 3

What is the right atrioventricular valve also known as

Answer 3

The tricuspid valve

Question 4

What is the left atrioventricular valve also known as

Answer 4

The bicuspid or mitral valve

Question 5

What tissue comprises the cardiac skeleton

Answer 5

Dense connective tissue

Question 6

What are the four functions of the cardiac skeleton

Answer 6

1. Anchors valve
2. Prevent over dilation
3. Main point of muscle insertion
4. Blocks direct spread of electrical impulses

Question 7

When do the AV valves open

Answer 7

When atrial pressure is greater than ventricular pressure

Question 8

What is the function of the semilunar valves

Answer 8

Prevent blood flow back into the heart from the aorta and Pulmonary trunk

Question 9

Systole refers to expansion or contraction

Answer 9

Contraction

Question 10

Diastole refers to expansion or contraction of the heart

Answer 10

Expansion or relaxation

Question 11

Are Atria walls thin or thick

Answer 11

Thin

Question 12

Are ventricle walls thin or thick

Answer 12

Thick

Question 13

How much bigger is the left ventricle than the right ventricle

Answer 13

3 times thicker because it exerts more pumping Force

Question 14

Which node sets the inherent rate of contraction for the heart

Answer 14

The sinoatrial node

Question 15

Atrial depolarization initiated by the SA node is indicated by which wave on the ECG

Answer 15

The P wave

Question 16

What happens at the QRS complex of the ECG

Answer 16

Atrial repolarization occurs

Question 17

Ventricular repolarization begins at the Apex causing which wave on the ECG

Answer 17

The T wave

Question 18

Which cranial nerve decreases heart rate and is it sympathetic or parasympathetic

Answer 18

Vagus nerve, parasympathetic

Question 19

Which nerve increases heart rate and force of contraction and is a sympathetic or parasympathetic

Answer 19

Vagus nerve, sympathetic

Question 20

What is caused by fatty deposits in the heart

Answer 20

Atherosclerosis

Question 21

What is the clinical term for chest pain

Answer 21

Angina pectoris

Question 22

What is a myocardial infarction

Answer 22

Heart attack

Question 23

What is caused by Progressive weakening of the heart where the heart cannot meet the body’s demand for oxygenated blood

Answer 23

Heart failure

Question 24

What happens when the heart enlarges and pumping efficiency declines

Answer 24

Congestive heart failure

Question 25

What is the enlargement and potential failure of the right ventricle

Answer 25

Pulmonary arterial hypertension

Question 26

What is rapid random firing of electrical impulses in the heart ventricles resulting from a crippled conducting system and is a common cause of cardiac arrest

Answer 26

Ventricular fibrillation

Question 27

What kinds of fibrillation promotes formation of clots which leads to Strokes from impulses Circle within the atrial myocardium stimulating the AV node

Answer 27

atrial fibrillation