Chapter 2: Cardiorespiratory System and Gas Exchange Flashcards

1
Q

volume of oxygen a gram of hemoglobin can carry

A

1.39 ml

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2
Q

average amount of hemoglobin in the blood of a healthy individual

A

15 g

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3
Q

90% of hemoglobin is bound to oxygen at this partial pressure of oxygen

A

60 mmHg

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4
Q

binding of one molecule of oxygen leads to a greater affinity for oxygen in hemoglobin

A

cooperative binding

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5
Q

These shift the oxygen hemoglobin dissociation curve to the right, resulting in an increase of the release of oxygen to myoglobin

A

increased temp

decreased pH

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6
Q

time from SA node impulse to contraction of the ventricles

A

0.2 seconds

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7
Q

valve that separates the right side of the heart

A

tricuspid valve

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8
Q

valve that separates the left side of the heart

A

mitral/bicuspid valve

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9
Q

the resistance of the entire systemic circulation is called

A

total peripheral resistance

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10
Q

the stimulation of this NS causes constriction or dilation of vessels

A

sympathetic NS

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11
Q

pressure exerted against the aterials walls as blood is forcefully ejected during ventricular contraction

A

Systolic BP

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12
Q

Work of the heart is reffered to as this

A

rate-pressure product RPP

or double product

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13
Q

RPP =

A

SBP x HR

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14
Q

pressure exerted against the aterial walls when no blood is being forcefully ejected through the vessels

A

DBP

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15
Q

MAP

A

mean arterial blood pressure

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16
Q

T/F: MAP is the average SBP and DBP

A

F, DBP is a larger contributing factor

17
Q

Amount of blood pumped by the heart in one minute

A

cardiac output

18
Q

Cardiac output (Q) =

A

Stroke volume x HR

19
Q

amount of blood ejected per beat

A

Stroke volume

20
Q

SV =

21
Q

the more the left ventricle is stretched, the more forceful the contraction and thus the greater volume of blood leaving the ventricle

A

frank-starling principle

22
Q

EDV is influenced by 2

A

heart volume

venous return of blood to the heart

23
Q

of generations in the lungs (count after the split of the trachea into left and right bronchi)

24
Q

method of examining static lung volumes

A

spirometry

25
normal breathing
tidal volume
26
vital capacity=
total lung capacity - residual volume
27
movement of gas (oxygen/CO2) across a cell membrane
diffusion
28
the amount of oxygen used by the tissues of the body
oxygen comsumption or oxygen uptake (Vo2)
29
Traditionally the term oxygen consumption is used in this situation
oxygen used by the tissue is directly measured
30
The name for the formula which represents Vo2
fick equation
31
Vo2 =
Cardiac Output (Q) x arterial-venous oxygen difference(a-vO2)
32
the highest amount of oxygen that can be used at the cellular level for the entire body
Vo2max
33
relative Vo2 at rest is typically
3.5 ml/kg/min