Chapter 6 - Circulatory System Questions Flashcards Preview

AAOS Anatomy and Physiology Vocabulary > Chapter 6 - Circulatory System Questions > Flashcards

Flashcards in Chapter 6 - Circulatory System Questions Deck (17):
0

Describe the S3 heart sound

- soft low pitched
- occurs 1/3 of the way through ventricular relaxation (diastole)
- LUB-DUB-da
- is a rapid ventricular filling due to an inrush of blood
- sometimes present in healthy young people
- in majority indicates increased left atrial filling pressure secondary to heart failure
- usually abnormal heart sound

1

Describe the S4 heart sound

- moderately pitched sound
- occurs prior to S1
- bla-lub-DUB
- results from an increased atrial pressure or decreased compliance of the left ventricle
- usually abnormal heart sound

2

Describe S1 heart sound

- lub
- results from sudden closure of atrioventricular valve at start of ventricular contraction (systole)
- normal heart sound

3

Describe S2 heart sound

- louder sound than S1
- DUB
- caused by closure of the pulmonic and aortic valves at end of systole

4

Which vena cava is the larger of the two?

The inferior vena cava

5

What causes bruits?

A hardening of the arteries

6

What are all the normal and abnormal heart sounds?

S1 lub
S2 DUB
S3 da
S4 bla
Murmur
Bruit
Clicks
Snaps

7

What do the heart sounds clicks and snaps indicate?

Heart valve malfunction

8

Which neurotransmitter has a greater stimulatory effect in beta receptors

Epinephrine

9

Which neurotransmitter has a predominant stimulatory action in alpha receptors

Norepinephrine

10

What are the 3 electrolytes important in initiating and conducting electrical impulses of the heart?

Sodium
Potassium
Calcium

11

What are the 3 layers of an artery start from the inside out

Tunica interna - made up of a layer of simple squamous epithelium known as endothelium.

Tunica media - makes up most of wall

Tunica externa - thinner, made mostly of connective tissue with irregular fibers.

12

What are the 9 subdivisions of the right coronary artery

Conus branch
Sinus node branch
Right ventricular branch
Atrial branch
Acute marginal branch
Atrioventricular node branch
Posterior descending branch
Left ventricular branch
Left atrial branch

13

Where does the right coronary artery and its divisions supply blood too

Walls of the right atrium and ventricle
Portion of the inferior part of the left ventricle
Portion of the conduction system

14

Which blood vessel of the myocardium is the largest

Left main coronary artery

15

Left main coronary artery divisions

Left anterior defending coronary artery

Circumflex coronary artery

16

What area of myocardium does the left main coronary artery and its subdivisions supply blood to?

Left ventricle
Intraventricular septum
AV node