Respiration Flashcards

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1
Q

partial pressure of a gas

A

its functional concentration relative to other gases present multiplied by overall pressure exerted on the gas

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2
Q

what organisms does gas exchange via diffusion work for?

A

small organisms

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3
Q

bulk flow

A

bring in a lot an release a lot, used often in lungs and heart

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4
Q

where do bulk flow and diffusion occur in respiratory system?

A

bulk flow in lungs and trachea, diffusion in capillary beds

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5
Q

tidal ventilation

A

how lungs inflate; negative pressure draws air into lungs (diaphragm contracts and flattens); positive pressure expels air from lungs (diaphragm relaxes and curves)

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6
Q

intercostal muscles

A

muscles within the rib cage

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7
Q

trachea

A

part of the throat, has a cartilage structure to protect it

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8
Q

bronchi

A

start of the lungs and branches into bronchioles

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9
Q

bronchiole

A

where air flows through the lungs, wrapped in smooth muscle

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10
Q

alveoli

A

sacs where bulk flow is stopped with capillary network surrounding it, wall is one cell thick, watery film surrounding the inside which allows oxygen to dissolve and diffuse

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11
Q

red blood cells

A

very small and have very few components to them, donut shape allows for pickup and movement of gases, contains hemoglobin

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12
Q

hemoglobin

A

protein which has 4 subunits all attracted to oxygen

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13
Q

cooperative binding

A

once one subunit of hemoglobin binds to oxygen the other subunits become more attracted to it and vice versa

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14
Q

myoglobin

A

has one subunit which binds to oxygen

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15
Q

o2 dissociation curve (hemoglobin)

A

partial pressure on x axis, o2 saturation of hemoglobin on y axis, sigmoidal shape, can shift

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16
Q

myoglobin dissociation curve

A

does not let go of o2 unless there is almost none in the cell (like with pregnant women)