Ch 13 Concepts of Transport Flashcards

1
Q

The plasma membrane is

A

selectively permeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Proteins in plasma membrane act as

A

ion channels

transporters

pumps

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

passive diffusion

A

movement with concentration gradient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

active transport

A

movement against concentration gradient

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Na+ is more concentrated in

A

extracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

K+ is more concentrated in

A

intracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Ca+ is more concentrated

A

extracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Mg+ is more concentrated in

A

intracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Cl- is more concentrated in

A

extracellular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

intracellular pH is

A

7.0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

extracellular pH is

A

7.4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

transport via simple diffusion and facilitated diffusion requires no

A

energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

transport via active transport requires

A

energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

protein transport requires a____________ change of the protein

A

conformational

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

If two substances are in solution together they will not interfere with diffusion of eachother. True or False

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Net movement depends on (diffusion)

A

concentration gradient

particle size

permeability of compound in trying to pass barrier

17
Q

simple/passive diffusion uses

A

no carrier protein interaction

can use pores or channels

18
Q

facilitated diffusion uses

A

a carrier protein

binding occurs

19
Q

Lipid diffusion through lipid bilayer

A

O, N, CO2, and alcohols highly lipid soluble

rate of diffusion dependent on degree of lipid solubility

20
Q

Lipid insoluble compounds and water through protein channels

A

pore channels for small molecules

pore diameter and charge on amino acids determines selectivity of passge

21
Q

Two types of gates used in channel protein

A

voltage gated channels=electrical

ligand-gated channels=chemical

22
Q

potassium channels selectively filter for

23
Q

Sodium channels are lined with amino acids that are highly

24
Q

(voltage gating) sodium and potassium channels open when the inside of cell becomes

A

positively charged

25
(chemical gating) binding a molecule may
open or close the gate
26
Binding affinity in carrier proteins is measured by
Km
27
If transporters are saturated they are said to be
maxed out (Vmax)
28
Km
=solute concentration that will give 1/2Vmax
29
Osmosis
semipermeable membrane allows movement of H2O but not solutes moves from high to low via aquaporins goal is to equalize concentration of solutes
30
Hydrostatic pressure
prussure applied to stop flow of water from high to low
31
Isotonic
pressure same on inside and outside of cell
32
Hypotonic
movement of water into cell increases cell volume pressure greater in cytosol
33
Hypertonic
movement of water out of cell cell will shrink pressure greater outside of cell