Exam 1 part 3 Flashcards
What polarity of molecule can pass through the plasma membrane
Non-polar
As O2 diffuses into the plasma membrane ___ diffuses out
CO2
Diffusion moves from a ___ concentration to a ____ concentration until _____ is reached
higher
lower
equiliberium
A higher magnitude of concentration gradient will speed/slow diffusion, a higher surface area will speed/slow diffusion, a higher temperature will speed/slow diffusion
speed
speed
speed
Permeability of the membrane is determined by
what polarity it is made out of
Protein gated channels work by:
and will let polar/nonplar molecules in through _____
being triggered and opened, the protein will change shape and let molecules in through diffusion, though has small area of permeability, since gate.
polar
diffusion
Proteins can/cannot be amphipathic which makes them good gates
can
Net diffusion of water down its concentration gradient is determined by ______ differences.
osmolarity
A 300 osmolarity cell placed in a 400 solution would shrink/burst/be fine because the solution is _______
shrink
hypertonic
A 300 osmolarity cell placed in a 200 solution would shrink/burst/be fine because the solution is _______
burst
hypotonic
a 300 osmolarity cell placed in a 300 solution would shrink/burst/be fine because the solution is _______
be fine
isotonic
The maximum rate of carrier-mediated transport is determined by
saturation
rate of diffusion is technically limited/infinate as opposed to carrier mediated which is limited/infinite in rate
infinite
limited
How would a competitor ion effect the rate of carrier mediated transport?
it would reduce the maximum rate by 50%
T/F for facilitated diffusion
- Substances move from lower concentration to higher
- Requires carrier molecule
- energy is required
- it is different from diffusion because transporter proteins can become saturated
F
T
F
T
