TEST REVIEW

Question 1

What is the determining factor determining how much blood is pumped from heart?

Answer 1

Amt. of blood returned to heart is amt. pumped out.

Frank-starling law

What the heart gets the heart pumps out.

Question 2

Stretching the heart causes:

Answer 2

The heart to pump faster

Question 3

Factors directly affect CO: (4)

Answer 3

Basic level of body metabolism.
Exercising.
Age.
Size of body.

Question 4

Normal CO:

Answer 4

Young healthy men: 5.6l//min

~5L/min

Question 5

Figure 20-5

Answer 5

Hypereeffective vs. hypoeffective CO curves

Focus: cause hypo/hyper heart

Question 6

Factors that decrease CO:

Answer 6

Severe blood vessel blockage

Myocarditis

Valvular Dz

Cardiac tamponade

Cardiac metabolic derangement

Question 7

Noncardiac factrs reducing CO;’

Answer 7

Decreased volume.
Acute venous dilation
Obstruction of large veins

Question 8

Factors that affect venous return to the heart from systemic circulation:

Answer 8

R atrial pressure-

venous return 0- r atrial pressure +7

Question 9

The most greater the difference btw the mean systemic filling pressure and the r atrial pressure:

Answer 9

.

Question 10

Venous return:

Answer 10

Man systemic filling pressure - r atrial pressure / resistance to venous pressure

Question 11

Impedes flow of blood into r atrial

Answer 11

R atrial pressure

Question 12

Forces systemic blood towards heart

Answer 12

Mean systemic filling pressure

Question 13

3rd factor affecting venous return

Answer 13

Blood flow resistance btw peripheral cvessels and r atrium

Question 14

Impedes blood flow

Answer 14

Resistance

Question 15

20-13 figure

Answer 15

Psf=7– shows what happens when resistance is changed

Question 16

Figure 20-14

Answer 16

Combination of resistance r atrial pressure and venous return

Question 17

How to increase Psf

Answer 17

Increase blood volume

Decrease venous compliance

Question 18

What happens w/ increase Psf:

Answer 18

Results in shift to RIGHT on venous return figure

Enhances filling of the ventricles

Question 19

HGow to decrease Psf:

Answer 19

Decrease vascular volume: hemorrhage /v/d

Increase in venous compliance

Question 20

Result from decrease Psf

Answer 20

Shift to the LEFT on venous return curve

Reduces filling of ventricles

Question 21

Figure 20-16

Answer 21

Coupled CO curve and venous return curve.