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ex phys > chapter 13 > Flashcards

chapter 13 Flashcards

1
Q

Daltons law

A

total pressure is the sum of partial pressures of all gases in a mixture

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2
Q

what is the barometric pressure at sea level

A

760 mmHg

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3
Q

what is the partial pressure of oxygen

A

159 mmHg

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4
Q

What percentage of saturation of hemoglobin should young healthy people have

A

young people should have a saturation of 97%

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5
Q

what is the alveolar partial pressure

A

103 mmHg

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6
Q

what is the equation for partial pressure of a gas

A

barometric pressure x concentration fraction

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7
Q

what is the partial pressure of carbon dixiode

A

0.23 mmHg

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8
Q

what is the partial pressure of nitrogen

A

600 mmHg

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9
Q

from the alveoli, oxygen is transported via

A
  1. bound to Hb
  2. dissolved in the blood
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10
Q

VO2 depends on

A
  1. O2 delivery to tissues
  2. O2 use in mitochondria
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11
Q

partial pressure of water vapour

A

47mmHg

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12
Q

what is the saturation of gases in the airways

A

100%

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13
Q

Alveolar air is altered by (2)

A
  • diffusion of O2 to the blood
  • entry of CO2 from the blood
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14
Q

average alveolar PaO2

A

103 mmHg

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15
Q

each gram of Hb can combine with ____ mL O2

A

1.34

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16
Q

what is a-v02 difference

A

the arteriovenous difference shows the amount of oxygen extracted by tissues
250 ml oxygen a min for men and 200 ml for women

17
Q

what conditions create the bohr effect

A
  • increased pressured of carbon dioxide
  • increased temperature
  • decreased pH
  • increased 2,3 DPG
18
Q

what is the bohr effect

A

a decrease in the amount of oxygen associated with hemoglobin in response to a lowered blood pH

19
Q

what is 2,3 DPG

A
  • byproduct of glycolysis
  • increases with intense exercise and may increase due to training
  • binds with Hb and reduces Hb affinity for oxygen
20
Q

myoglobin can only store ___ iron atom and ___ oxygen molecule

A

1 & 1

21
Q

What are the three ways that carbon dioxide is transported

A
  1. bound to Hb
  2. dissolved in plasma (about 5%)
  3. plasma bicarbonate
22
Q

what is the haldane effect

A

Hb interaction with oxygen reduces its ability to combine with carbon dioxide (aids in releasing carbon dioxide in the lungs)

23
Q

3 factors to increase VO2 during exercise

A
  1. right shift of O2 dissociation curve
  2. decreased tissue PO2
  3. increased cardiac output
24
Q

what date did we get ahead of schedule

A

october 19

ex phys (15 decks)

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