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Physiology > TEST REVIEW > Flashcards

TEST REVIEW Flashcards

1
Q

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

A

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

Frank-starling law

What the heart gets the heart pumps out.

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2
Q

Stretching the heart causes:

A

The heart to pump faster

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3
Q

Factors directly affect CO: (4)

A

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

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4
Q

Normal CO:

A

Young healthy men: 5.6l//min

~5L/min

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5
Q

Figure 20-5

A

Hypereeffective vs. hypoeffective CO curves

Focus: cause hypo/hyper heart

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6
Q

Factors that decrease CO:

A

Severe blood vessel blockage

Myocarditis

Valvular Dz

Cardiac tamponade

Cardiac metabolic derangement

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7
Q

Noncardiac factrs reducing CO;’

A

Decreased volume.
Acute venous dilation
Obstruction of large veins

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8
Q

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

A

R atrial pressure-

venous return 0- r atrial pressure +7

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9
Q

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

A

.

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10
Q

Venous return:

A

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

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11
Q

Impedes flow of blood into r atrial

A

R atrial pressure

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12
Q

Forces systemic blood towards heart

A

Mean systemic filling pressure

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13
Q

3rd factor affecting venous return

A

Blood flow resistance btw peripheral cvessels and r atrium

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14
Q

Impedes blood flow

A

Resistance

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15
Q

20-13 figure

A

Psf=7– shows what happens when resistance is changed

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16
Q

Figure 20-14

A

Combination of resistance r atrial pressure and venous return

17
Q

How to increase Psf

A

Increase blood volume

Decrease venous compliance

18
Q

What happens w/ increase Psf:

A

Results in shift to RIGHT on venous return figure

Enhances filling of the ventricles

19
Q

HGow to decrease Psf:

A

Decrease vascular volume: hemorrhage /v/d

Increase in venous compliance

20
Q

Result from decrease Psf

A

Shift to the LEFT on venous return curve

Reduces filling of ventricles

21
Q

Figure 20-16

A

Coupled CO curve and venous return curve.

Physiology (10 decks)

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