Study sets matching "across membranes"

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Study sets matching "across membranes"

Transport Across Cell Membranes
solute
solvent
concentration
concentration gradient
A substance that is dissolved in a solution.
The liquid that the solute is dissolved in.
A measure of the amount of solute dissolved in a solvent.
The difference in concentration of a substance on two sides o…
solute
A substance that is dissolved in a solution.
solvent
The liquid that the solute is dissolved in.
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
23 terms
Movement Across Membranes
Selective Permeability
Passive Transport
Facilitated Diffusion
Diffusion
a cell membrane process allowing some molecules to pass thru…
movement of molecules thru a cell membrane without using ener…
passive mediated transport of molecules across the cell membr…
movement of solutes like ions & molescules from an area of hi…
Selective Permeability
a cell membrane process allowing some molecules to pass thru…
Passive Transport
movement of molecules thru a cell membrane without using ener…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
Movement across cell membranes
Concentration
solute
solvent
concentration gradient
The more particles there are in a certain volume, the more co…
The dissolved substance in a solution.
The liquid in which the solute dissolves to form a solution.
exists when there is a region of high concentration leading t…
Concentration
The more particles there are in a certain volume, the more co…
solute
The dissolved substance in a solution.
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
10 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
10 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
9 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
Movement across cell membranes
diffusion
osmosis
water potential
facilitated diffusion
The net movement of solute molecules or ions in a gas or liqu…
The movement of water molecules from a region of higher water…
A measure of the ability of water molecules to move freely in…
The passive movement of molecules across membranes down their…
diffusion
The net movement of solute molecules or ions in a gas or liqu…
osmosis
The movement of water molecules from a region of higher water…
9 terms
Movement across cell membranes
diffusion
osmosis
facilitated diffusion
active transport
The net movement of molecules or ions in a gas or liquid from…
The movement of water molecules from a region of higher water…
The passive movement of molecules across membranes down their…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
osmosis
The movement of water molecules from a region of higher water…
10 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
10 terms
Transport Across Membranes
Diffusion
Osmosis
Facilitated Diffusion
Active Transport
the movement of materials from an area of high concentration…
the movement of only water through a semi-permeable membrane,…
the movement of materials across a membrane using a protein c…
transport that requires energy in the form of ATP, usually to…
Diffusion
the movement of materials from an area of high concentration…
Osmosis
the movement of only water through a semi-permeable membrane,…
30 terms
Movement Across Membranes
Movement of oxygen and carbon dioxide
movement of ions and water
passive transport
Types of passive transport
diffuse across wet phospholipid bi-layer
move through proteins
no energy required
diffusion... osmosis... facilitated diffusion
Movement of oxygen and carbon dioxide
diffuse across wet phospholipid bi-layer
movement of ions and water
move through proteins
22 terms
Transport Across Cell Membranes
solute
solvent
concentration
concentration gradient
A substance that is dissolved in a solution.
The liquid that the solute is dissolved in.
A measure of the amount of solute dissolved in a solvent.
The difference in concentration of a substance on two sides o…
solute
A substance that is dissolved in a solution.
solvent
The liquid that the solute is dissolved in.
9 terms
Movement across cell membranes
diffusion
osmosis
facilitated diffusion
active transport
The net movement of molecules or ions in a gas or liquid from…
The movement of water molecules from a region of higher water…
The passive movement of molecules across membranes down their…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
osmosis
The movement of water molecules from a region of higher water…
23 terms
Movement Across Membranes
Selective Permeability
Passive Transport
Facilitated Diffusion
Diffusion
a cell membrane process allowing some molecules to pass thru…
movement of molecules thru a cell membrane without using ener…
passive mediated transport of molecules across the cell membr…
movement of solutes like ions & molescules from an area of hi…
Selective Permeability
a cell membrane process allowing some molecules to pass thru…
Passive Transport
movement of molecules thru a cell membrane without using ener…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
15 terms
Transport across membranes
Extracellular fluid
Homeostasis
Fluid mosaic model
Hydrophobic
The immediate environment of a cell
The maintenance of a relatively constant internal environment…
The currently accepted model of cell membrane structure
Water hating
Extracellular fluid
The immediate environment of a cell
Homeostasis
The maintenance of a relatively constant internal environment…
35 terms
Transport Across Cell Membranes
action potental
active transport
axons
Ca2+ pump
Traveling wave of electrical excitation caused by rapid, tran…
The movement of a solute across a membrane against its electr…
Long, thin extension that conducts electrical signals away fr…
An active transporter that uses energy supplied by ATP hydrol…
action potental
Traveling wave of electrical excitation caused by rapid, tran…
active transport
The movement of a solute across a membrane against its electr…
18 terms
Transport across membranes
Passive transport
Rate of diffusion
Dynamic equilibrium
Simple diffusion
The movement of a substance across a membrane without requiri…
Depends on concentration difference
The state in which continuous action results in balanced cond…
The ability of a substance to move across a membrane unassisted
Passive transport
The movement of a substance across a membrane without requiri…
Rate of diffusion
Depends on concentration difference
15 terms
Traffic Across Membranes
Selectively Permeable
Fluid-Mosaic Model
Passive Transport
Active Transport
They control the the flow of the substances into and out of t…
Diffusion caused by random movement of particles across a mem…
Substances are transported across a membrane, against the con…
Selectively Permeable
They control the the flow of the substances into and out of t…
Fluid-Mosaic Model
Transport across membranes
Structures that make up the cell membr…
Examples of passive transport
Osmosis
Diffusion
Phospholipids and proteins
Diffusion and Osmosis
the movement of water molecules from an area of high concentr…
is the movement of molecules of a substance from an area of h…
Structures that make up the cell membr…
Phospholipids and proteins
Examples of passive transport
Diffusion and Osmosis
13 terms
movement across membranes
simple diffusion
facilitated diffusion
osmosis
toxicity
-molecules move from high to low concentration... -gradient is p…
-carrier molecules transport ions or molecules w/ gradient
movement of H2O from high to low concentration differentially…
concentration of solutes in and out of the cell
simple diffusion
-molecules move from high to low concentration... -gradient is p…
facilitated diffusion
-carrier molecules transport ions or molecules w/ gradient
20 terms
Transportation Across Cell Membranes
Brownian Motion
Concentration Gradient
Equilibrium
Dynamic Equilibrium
Chaotic movement of colloidal particles
A difference in the concentration of a substance across a dis…
As particles move from a high area of concentration to a low…
Once equilibrium is achieved transport continues in a constan…
Brownian Motion
Chaotic movement of colloidal particles
Concentration Gradient
A difference in the concentration of a substance across a dis…
19 terms
Transport across membranes
rate diffusion area concentration thic…
area concentration size visocity
small uncharged electrochemical concen…
proteins passive ping pong
In Fick's first law of diffusion J stands for the net _______…
According to Fick's, diffusion (J) is proportional to the ___…
(small/big) and (charged/uncharged) molecules have the highes…
Facilitated diffusion uses ________ to provide a route throug…
rate diffusion area concentration thic…
In Fick's first law of diffusion J stands for the net _______…
area concentration size visocity
According to Fick's, diffusion (J) is proportional to the ___…
23 terms
Transport Across Membranes
Passive Membrane Transport
Diffusion
Dynamic Equilibrium
Types of Passive Membrane Transport
Transport of substances across membranes... NO energy input
Net movement of substances ... High-low concentrations... Driving f…
Particles continue movement even at equilibrium... Net movement…
Simple Diffusion... Facilitated Diffusion... Osmosis
Passive Membrane Transport
Transport of substances across membranes... NO energy input
Diffusion
Net movement of substances ... High-low concentrations... Driving f…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
56 terms
Transport across Membranes
Thermodynamically favorable processes:
Uncharged solute: moving down concentr…
Charged solute (ion): net DGt' depends…
Thermodynamically unfavorable processe…
net DGt' < 0
Thermodynamically favorable processes
chemical potential... electrical potential: moving down charge…
Moving a solute against concentration and/or charge gradient,…
Thermodynamically favorable processes:
net DGt' < 0
Uncharged solute: moving down concentr…
Thermodynamically favorable processes
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
15 terms
Movement across membranes
diffusion
rate of diffusion
temperature
concentration
Occurs when particles move from an area of high concentration…
how fast diffusion is occurring
as this increases, the rate of diffusion increases because th…
as this increases, the rate of diffusion increases because th…
diffusion
Occurs when particles move from an area of high concentration…
rate of diffusion
how fast diffusion is occurring
6 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of high water c…
Moves against concentration gradient, requiring's energy
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
17 terms
transport across membranes
Na+ concentration ICF vs ECF
K+ concentration ICF vs ECF
solute partition coefficient
solute diffusion coefficient
Na+ concentration very low inside cell, very high outside (ECF)
K+ concentration very high inside, low outside
k = concentration in oil / concentration in water... (solubility…
D = kT / 6πrn... larger molecules move slower, lower k
Na+ concentration ICF vs ECF
Na+ concentration very low inside cell, very high outside (ECF)
K+ concentration ICF vs ECF
K+ concentration very high inside, low outside
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
10 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
16 terms
Movement across membranes
VCAA function of plasma membrane
The structure of a membrane is often r…
Structure and function of phospholipid…
Function of membrane proteins
- to regulate inputs and outputs of the cell.... Extra detail -…
it is made up of many small parts (mosaic) and is a flexible…
Phospholipids align themselves in a bilayer ... hydrophobic fa…
providing structural support,... channels/carrier proteins for f…
VCAA function of plasma membrane
- to regulate inputs and outputs of the cell.... Extra detail -…
The structure of a membrane is often r…
it is made up of many small parts (mosaic) and is a flexible…
Movement Across Membranes
Selective Permeability
Passive Transport
Diffusion
Concentration Gradient
a cell membrane process allowing some molecules to pass thru…
movement of molecules thru a cell membrane without using energy
movement of solutes like ions & molescules from an area of hi…
difference in the concentration of a substance (ions/molecule…
Selective Permeability
a cell membrane process allowing some molecules to pass thru…
Passive Transport
movement of molecules thru a cell membrane without using energy
21 terms
Transport Across Membranes
What can go through a lipid bilayer
Diffusion
Solution
Solvent
Characteristics of a solute determine if it can diffuse throu…
The random movement of molecules. Net result of diffusion is…
liquid with ions or molecules dissolved in it
the liquid in a solution
What can go through a lipid bilayer
Characteristics of a solute determine if it can diffuse throu…
Diffusion
The random movement of molecules. Net result of diffusion is…
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
11 terms
Movement across cell membranes
diffusion
facilitated diffusion
osmosis
active transport
The net movement of molecules or ions in a gas or liquid from…
The passive movement of molecules across membranes down their…
The movement of water molecules from a region of higher water…
Movement of substances across membranes against their concent…
diffusion
The net movement of molecules or ions in a gas or liquid from…
facilitated diffusion
The passive movement of molecules across membranes down their…
14 terms
Transport across membranes
simple diffusion
facilitated diffusion
protein channels
carrier protein
the net movement of molecules from an area of high concentrat…
movement of molecules down their concentration gradient throu…
water-filled hydrophilic channels across the membrane allowin…
alternative form of facilitated diffusion; protein that chang…
simple diffusion
the net movement of molecules from an area of high concentrat…
facilitated diffusion
movement of molecules down their concentration gradient throu…
Movement Across Plasma Membranes
Selectively permeable membrane
Passive transport
Phospholipid bilayer
Integral proteins and Channels
A cell membrane that allows certain molecules or ions to pass…
- Small molecules that can cross the membrane without assista…
- A double layer of phospholipid molecules, along with severa…
- There's a variety of integral proteins float like icebergs…
Selectively permeable membrane
A cell membrane that allows certain molecules or ions to pass…
Passive transport
- Small molecules that can cross the membrane without assista…
19 terms
Transport Across Membranes
Active vs Passive Transport
Diffusion
Osmosis
Hypertonic... Hypotonic... Isotonic
Active:... movement of a substance against its concentration gra…
always moves solutes toward equilibrium.... It always proceeds f…
the diffusion of water across a differentially (semi) permeab…
Hypertonic: ... a solution (A) with a higher solute conc. than i…
Active vs Passive Transport
Active:... movement of a substance against its concentration gra…
Diffusion
always moves solutes toward equilibrium.... It always proceeds f…
Transport Across Membranes
passive diffusion
polar molecules
transporters
carriers
simple diffusion through lipid bilayer... effective for lipophil…
-must lose hydration shell to pass through... -activation energy…
enzymes that facilitate transport across membranes
flip between distinct conformations to move molecules across…
passive diffusion
simple diffusion through lipid bilayer... effective for lipophil…
polar molecules
-must lose hydration shell to pass through... -activation energy…
15 terms
Bio Sac Movement across Membranes
Diffusion
Osmosis
Partially permeable membrane
Facilitated Diffusion
Is the passive movement of molecules along a concentration gr…
The passive net movement of water molecules through a partial…
Allows the molecules of a solvent to pass freely across while…
Occurs through protein channels, is faster than diffusion and…
Diffusion
Is the passive movement of molecules along a concentration gr…
Osmosis
The passive net movement of water molecules through a partial…
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