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Question corrections > Resp knowledge corrections > Flashcards

Resp knowledge corrections Flashcards

1
Q

intra- alveolar pressure before inspiration

A

= atmospheric pressure

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2
Q

intrapleural fluid cohesiveness plus +ve intrapleural pressure

A

holds lungs and thoracic wall in opposition

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3
Q

sub atmospheric intrapleural pressure

A

transmural pressure gradient across lung and chest wall, lungs expand outwards, chest squeeze inward in inspiration

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4
Q

accessory resp muscles

A

scalenous and sternocleidomastoid

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5
Q

spirometer

A

measures volume of air inspired and expired

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6
Q

radius of airway

A

determines resistance to airflow

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7
Q

intrapleural pressure increases in

A

expiration and decreases in inspiration

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8
Q

dynamic airway compression

A

increased intrapleural pressure during expiration compresses alveoli airway

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9
Q

alveolar ventilation

A

volume of air exchanged between atmostphere and alveoli/ min

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10
Q

blood flow faster where in lung

A

bottome

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11
Q

increased CO2

A

increased perfusion, increased airflow by decreasing airflow resistance

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12
Q

increased O2

A

increased ventilation

pulmonary vasodilatation

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13
Q

diffusion coefficient of Co2

A

20 x O2

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14
Q

most O2 in blood

A

bound to Hb not dissolved

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15
Q

PO2

A

determines Hb O2 concentration

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16
Q

Hb concentration decreases

A

O2 saturation normal

17
Q

myoglobin

A

in skeletal and cardiac muscle

18
Q

R shift in oxygen dissociation curve

A

decrease affinity for O2 and increased temp

19
Q

co2 mostly transported

A

in blood as HCO3

20
Q

what catalyses HCO3

A

carbonic anhydrase

21
Q

CO2 binds to which part of Hb

A

globin

22
Q

reduced Hb binds to

A

more CO2 than HbO2

23
Q

haldane affect

A

o2 released at tissues

increased Hb affinity for CO2 so CO2 taken from tissues

24
Q

inspiration caused by

A

dorsal resp group neurons

25
Q

rhythm generated in

A

medulla

modified by pons

26
Q

chemoreceptors

A

sense value of gas tensions

27
Q

what diffuses across blood brain barrier

A

co2 not H+

Question corrections (17 decks)

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