A&P - Chapter 28 (Part 2)

Question 1

How many valves does the heart have?

Answer 1

4

Question 2

What are the 2 different types of valves?

Answer 2

1. Atrioventricular valves
   - 2 AV nodes
2. Semilunar valves
   - 2 SL valves

Question 3

What do AV valves separate?

Answer 3

Atria from ventricles

Question 4

What do AV valves prevent?

Answer 4

Blood from flowing back into the atria from the ventricles when the ventricles contact

Question 5

What are 2 types of AV valves?

Answer 5

1. Tricuspid valve

2. Bicuspid/mitral valve

Question 6

Where is the tricuspid valve?

Answer 6

On the right side of the heart

- 3 flaps

Question 7

Where is the bicuspid/mitral valve?

Answer 7

On the left side of the heart

- 2 flaps

Question 8

What does the chordae tendinae attach?

Answer 8

AV valves to the wall of the heart

Question 9

What are the 2 types SL valves?

Answer 9

1. Pulmonary SL valves

2. Aortic SL valve

Question 10

Where are the pulmonary SL valves? (2)

Answer 10

1. At the entrance of the pulmonary artery/trunk

2. Between the right ventricles and pulmonary artery

Question 11

Where are the aortic SL valve? (2)

Answer 11

1. At the entrance of the aorta

2. Between the left ventricle and the aorta

Question 12

What does the heart act as?

Answer 12

2 Separate pumps

- RA/RV perform different functions from the LA/LV

Question 13

Atrial systole

Answer 13

With each heart beat, the LA and RA contracts simultaneously to fill the LV and RV with blood

Question 14

Ventricular systole

Answer 14

With each heart beat, the LV and RV contract simultaneously

Question 15

What does the pulmonary circulation do?

Answer 15

Bring blood from the right ventricle to the lungs

Question 16

What does the systemic circulation do?

Answer 16

Bring blood from the left ventricle to the body

Question 17

Coronary circulation

Answer 17

Blood supply to the heart muscle

Question 18

What does a constantly working cardiac muscle need?

Answer 18

A constant supply of oxygen and nutrient rich blood

Question 19

What are the first branches of the aorta?

Answer 19

Coronary arteries

Question 20

What do the coronary arteries supply?

Answer 20

Blood that supplies oxygen and nutrients to the myocardium

Question 21

Where does the most abundant blood supply go?

Answer 21

To the myocardium of the left ventricle

Question 22

What do coronary veins do?

Answer 22

Return blood to the right atrium

Question 23

What is another word for a heart attack?

Answer 23

Myocardial infarction

- MI

Question 24

Heart attack

Answer 24

Blockage of blood flow through the coronary arteries

Question 25

Angina pectoris

Answer 25

Chest pain caused by inadequate oxygen of the heart

Question 26

Coronary bypass surgery

Answer 26

Veins from other parts of the body are used to bypass blockages in coronary arteries

Question 27

What cant be repaired?

Answer 27

Arteries

Question 28

What kind of movement does myocardium do?

Answer 28

Autorhythmic

Question 29

Autorhythmic

Answer 29

Can produce its own action potentials

Question 30

What is changes in rhythm of myocardial contracting controlled by?

Answer 30

Motor neuron pathways of both efferent divisions of the autonomic nervous system