Chapter 15: The Heart Flashcards Preview

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Flashcards in Chapter 15: The Heart Deck (50):
0

Arteries and veins arise from this portion of the heart

Base

1

This ventricle pumps blood to the lungs

Right ventricle

2

Scientific name for a heart attack

Myocardial Infarction

3

The P wave of the electrocardiogram represents this event

Atrial depolarization

4

The first heart sound (Lubb) is caused by closure of these valves

AV

5

Name the parts of the pericardium

Fibrous, serous

6

The outermost layer of the pericardium

Fibrous

7

The layer of the pericardium that is adjacent to the heart muscle

Visceral

8

When the atria are in systole the ventricles are in_______?

Dystole

9

When the ventricles are in systole the AV valve is (open/closed)?

Closed

10

The main function of the heart valves

Prevent backflow of the blood

11

The T wave of the ECG indicates this event

Repolarization

12

Venous blood (without oxygen) returns to this CHAMBER

Right atrium

13

The coronary arteries take blood to this location

Heart

14

Hardening of the walls of arteries from smooth muscle proliferation and cholesterol deposit

Atherosclerosis

15

Condition caused by reduced blood flow to the myocardium

Myocardial ischemia

16

Irregular heart rhythm

Arrhythmia

17

Opening in the septum between the atria in a fetus

Foremen ovale

18

Narrowing of a valve opening by scar tissue

Stenosis

19

Different areas of the heart beating independently

Fibrillation

20

Narrowing of the coronary arteries reducing blood flow to the heart; has a number of causes and is the leading cause of death in the US

Coronary artery disease

21

The term "epicardium" refers to this structure

Outermost layer of the heart wall

22

Circulation of blood through the heart muscle is supplied by the ___ circulation

Coronary

23

Cardiac muscle is known as?

Myocardium

24

Chamber with the thickest wall of the heart

Left ventricle

25

The heartbeat originates in this mass of tissue

SA node

26

Structure who's job is to sequence the ventricular contractions with the atrial contractions

AV node

27

The electrical conducting system in the outer walls of the ventricles

Perkinde fibers

28

Location of the S-A node of the heart

Right atrium

29

The QRS spike represents this event

Ventricular depolarization

30

The second heart sound (dupp) is caused by this

SL valve closing

31

Heart rate is monitored and regulated by this structure

Cardiovascular center of medulla

32

This nerve decreases heart rate

Vagus

33

The heart speeds up when we stand up quickly due to to receptors here that detect blood pressure changes

Carotid artery

34

Explain the contractions of the chambers in the cardiac cycle

Atria contract
Ventricle contract
All relax

35

Coronary arteries branch off from ______

Aorta

36

The action of ______ causes audible heart sounds

Valves

37

What causes heart murmurs

Improperly closing valves

38

The period of relaxation in the cardiac cycle

Diastole

39

A heart that is stretched just before contraction will contract stronger according to this law

Frank Starling

40

The contraction phase of the heart

Systole

41

The "good" chemicals that take cholesterol to the liver are

High density lipids

42

What causes the semilunar valves to close

Pressure drop

43

The volume of blood ejected from each ventricle with one contraction of the heart

70mL

44

The amount of blood ejected by each ventricle each minute

Cardiac output

45

The term describing heart chamber contraction is _____.

Systole

46

Name several chemicals which would act to slow heart rate

K+ , Na+

47

The term describing heart chamber relaxation is ________.

Diastole

48

Chest pain caused from ischemia

Angina pectoris

49

Inflammation of the heart covering

Pericarditis