what are plant cell walls responsible for?
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pressurization
water and mineral transport occurs in the _______. It is a ______ flow driven by _____ pressure
system
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xylem, bulk, negative
once oxygen equilibrates in concurrent, will diffusion still occur?
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no!
true or false: solute potential ALWAYS has positive values
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false! it always has negative values
how does swelling in the ankles occur? (edema)
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when fluid forced out of capiliaries > what the lymphatic system can gandle
what drives water upwards in plants? how does it do this?
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root pressure
ions accumulate in the vasculature = increased solute potential therefore,
water = pushed up to plant (goes to high solute)
true or false: dead space volume can change with each breath
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false!! it's a fixed volume
relative to atmospheric pressure, during inhalation, alveolar pressure must be:
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lower than atmospheric pressure because things flow from high to low
how does the plant xylem filter work?
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they have water permeable membranes covering pits (where water enters),
which filter small particles like bacteria
why are mammalian lungs inefficient?
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bc gas exchange only occurs at the alveoli -- the other parts of lungs
(trachea, bronchii, bronchioles) = not involved in gas exchange
when air flows out of lungs, what happens to the diaphragm> what happens to the
volume + pressure of the chest cavity? is this positive or negative pressure?
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breathing out = relaxation of diaphragm
- decreases volume + increases pressure
- positive pressure
why is bird ventilation more effective than humans?
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they don't have "stale" air-- they have different sacs (anterior/posterior) that
are filled with air from different places (anterior = lungs, posterior = outside
air)
diffusion is slow. how do organisms overcome limitations of diffusion?
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bulk flow speeds things up!
what happens if the atmosphere is at 100% humidity?
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water potential is 0 because there is no driving force for evaporation
Give this one a try later!
pressurization
water and mineral transport occurs in the _______. It is a ______ flow driven by _____ pressure
system
Give this one a try later!
xylem, bulk, negative
once oxygen equilibrates in concurrent, will diffusion still occur?
,Give this one a try later!
no!
true or false: solute potential ALWAYS has positive values
Give this one a try later!
false! it always has negative values
how does swelling in the ankles occur? (edema)
Give this one a try later!
when fluid forced out of capiliaries > what the lymphatic system can gandle
what drives water upwards in plants? how does it do this?
Give this one a try later!
root pressure
ions accumulate in the vasculature = increased solute potential therefore,
water = pushed up to plant (goes to high solute)
true or false: dead space volume can change with each breath
,Give this one a try later!
false!! it's a fixed volume
relative to atmospheric pressure, during inhalation, alveolar pressure must be:
Give this one a try later!
lower than atmospheric pressure because things flow from high to low
how does the plant xylem filter work?
Give this one a try later!
they have water permeable membranes covering pits (where water enters),
which filter small particles like bacteria
why are mammalian lungs inefficient?
Give this one a try later!
bc gas exchange only occurs at the alveoli -- the other parts of lungs
(trachea, bronchii, bronchioles) = not involved in gas exchange
when air flows out of lungs, what happens to the diaphragm> what happens to the
volume + pressure of the chest cavity? is this positive or negative pressure?
, Give this one a try later!
breathing out = relaxation of diaphragm
- decreases volume + increases pressure
- positive pressure
why is bird ventilation more effective than humans?
Give this one a try later!
they don't have "stale" air-- they have different sacs (anterior/posterior) that
are filled with air from different places (anterior = lungs, posterior = outside
air)
diffusion is slow. how do organisms overcome limitations of diffusion?
Give this one a try later!
bulk flow speeds things up!
what happens if the atmosphere is at 100% humidity?
Give this one a try later!
water potential is 0 because there is no driving force for evaporation
