Ch 8 : Body Systems Concepts

Question 1

Trace the Pulmonary Circulation

Answer 1

Body
    |
Superior and Inferior Venae Cavae
    |
RIGHT ATRIUM
    |
    |  ( thru Tricuspid Valve )
    |
RIGHT VENTRICLE
    |
Pulmonary Artery
    |
Lungs

Question 2

Trace the Sytemic Circulation

Answer 2

from the Lungs
    |
Pulmonary Vein
    |
LEFT ATRIUM
    |
    |  (thru Mitral Valve )
    |
LEFT VENTRICLE
    |
Aorta
    |
into the Body

Question 3

The 3 layers of Cardiac tissue are…

Answer 3

1. endocardial lining (thin coating of the chambers)
2. myocardium (muscle layer)
3. visceral pericardium

Question 4

The autonomic nervous tissue of the heart is known as the _____

Answer 4

Cardiac Conduction System

Question 5

Trace the Cardiac Conduction

Answer 5

Sinoatrial (SA) Node => stimulates the atria
     |
Atrioventricular (AV) Node
     |
Bundle of His
     |
Left and Right Bundle Branches
     |
Purkinje Fibers => stimulate the ventricles

Question 6

CO = __ x HR

Cardiac Output = WHAT x Heart Rate?

Answer 6

CO = SV x HR

Cardiac Output = Stroke Volume x Heart Rate

Question 7

CO = SV x __

Cardiac Output = Stroke Volume x WHAT?

Answer 7

CO = SV x HR

Cardiac Output = Strike Volume x Heart Rate

Question 8

The normal Stroke Volume (SV) for a typical adult male is ___ mL?

Answer 8

Normal adult male SV is approximately

70 mL.

Question 9

Afterload is _____.

Answer 9

Afterload is systemic resistance.

Question 10

Preload is _____.

Answer 10

Preload is the amount of blood returning to the heart.

Present in the ventricle prior to contraction.

Question 11

The heart compensates lower stroke volume with ___.

Answer 11

The heart compensates lower stroke volume with

increased heart rate (tachycardia).

Question 12

Hypovolemia decreases ___load and ___,

causing _____cardia as compensation.

Answer 12

Hypovolemia decreases
PRELOAD and STROKE VOLUME,
causing TACHYCARDIA
as compensation.

Question 13

The Ejection Fraction range is typically __ - __ %

Answer 13

55 to 70%.

Question 14

Factors by which SV is adjusted to maintain homeostasis?

Answer 14

1. Preload
2. Contractility
3. Afterload

Question 15

The Frank-Starling’s Law states that….

Answer 15

The more the myocardium is stretched by preload,
the more force it contracts with,
thus the larger the stroke volume.

Question 16

The inotropic property of the myocardium is?

Answer 16

Its ability to contract more strongly in response to epinephrine
and other stimuli.

Question 17

Afterload is determined primarily by?

Answer 17

Systemic Vascular Resistance

Question 18

Systemic Vascular Resistance is determined primarily by?

Answer 18

The diameter of the peripheral arterioles.