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Study sets matching "across membranes"

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Study sets matching "across membranes"

114 terms
Transport Across Membranes
The plasma (cell) membrane
Plasma Membrane Function
Structure of Cell Membrane
Outside Cell (Image 1)
Differentially (aka. selectively) permeable which means certa…
Controls the entry of nutrients and the exit of waste product…
A. (Image 1)
The plasma (cell) membrane
Differentially (aka. selectively) permeable which means certa…
Plasma Membrane Function
Controls the entry of nutrients and the exit of waste product…
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…
22 terms
AS_transport across membranes
Diffusion
Facilitated diffusion
Active transport
Increasing Temperature
net movement of particles from region of higher concentration…
net movement of particles from region of higher concentration…
movement of particles from region of lower concentration to r…
rate of diffusion increases because particles have more kinet…
Diffusion
net movement of particles from region of higher concentration…
Facilitated diffusion
net movement of particles from region of higher concentration…
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…
21 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.
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…
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…
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…
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…
27 terms
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.
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
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…
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…
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
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,…
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…
13 terms
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…
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…
23 terms
Movement Across Membranes
what are the 5 sites the body contacts…
what is our total body fluid amount, a…
What is the normal osmolarity of cellu…
what does 300 milliosmoles/litre mean?
Integumentary: skin surface... Gastrointestinal: lumen of the tu…
42 L total ( 60% total body weight)... 28 L intracellular fluid…
300 milliosmoles/litre
for every litre of fluid, there is 300 osmotic particles that…
what are the 5 sites the body contacts…
Integumentary: skin surface... Gastrointestinal: lumen of the tu…
what is our total body fluid amount, a…
42 L total ( 60% total body weight)... 28 L intracellular fluid…
16 terms
[Biology] Movement across membrane
Diffusion
Facilitated Diffusion
Active Transport
Endocytosis
The net movement of a solute from a region of high concentrat…
The net movement of a substance across a plasma membrane via…
The energy-dependent movement of a substance against the conc…
The bulk movement of solids or liquids into a cell by engulfm…
Diffusion
The net movement of a solute from a region of high concentrat…
Facilitated Diffusion
The net movement of a substance across a plasma membrane via…
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…
13 terms
Transport across Membranes
Carrier protein
Phospholipid
Selectively-permeable
Diffusion
A protein that transports specific ions and molecules across…
The membrane is made of a double layer of these molecules.
A description of how the cell membrane only lets certain mole…
Movement of molecules or ions from high concentration to low…
Carrier protein
A protein that transports specific ions and molecules across…
Phospholipid
The membrane is made of a double layer of these molecules.
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
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
17 terms
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
8 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…
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…
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…
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
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…
26 terms
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…
21 terms
Transport across membranes
Factors which affect the rate of diffu…
The effectiveness of an exchange surfa…
Surface area
Temperature
The difference in concentrations (gradient)... The temperature... T…
Having a large surface area... A membrane that is thin to provid…
This needs to be large to increase the rate of diffusion/osmo…
A high temperature will give the particles more kinetic energ…
Factors which affect the rate of diffu…
The difference in concentrations (gradient)... The temperature... T…
The effectiveness of an exchange surfa…
Having a large surface area... A membrane that is thin to provid…
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…
18 terms
Movement across membranes
Refers to a membrane which can select…
The movement of particles from an area…
Applies to movement of particles in os…
Applies to movement of particles using…
Selectively permeable membrane
Diffusion
Moving down a concentration gradient
Moving against a concentration gradient
Refers to a membrane which can select…
Selectively permeable membrane
The movement of particles from an area…
Diffusion
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
25 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.
8 terms
transport across cell membranes! :)
name 2 substances present in cell memb…
give 2 passive processes by which subs…
state 1 difference between an active t…
state 1 difference between osmosis and…
lipid, protein
diffusion, osmosis
active processes require energy, passive ones do not
osmosis only involves water and occurs through membranes
name 2 substances present in cell memb…
lipid, protein
give 2 passive processes by which subs…
diffusion, osmosis
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…
14 terms
Transport Across a Membrane
Plasma Membrane
Polar
Phospholipid
Hydrophilic
A bilayer of phospholipids and proteins that surrounds the ce…
A molecule that has a positive pole and a negative pole. Like…
A Lipid with a phosphate head. They have a polar region and a…
Has an affinity for water (or a "love" for water)
Plasma Membrane
A bilayer of phospholipids and proteins that surrounds the ce…
Polar
A molecule that has a positive pole and a negative pole. Like…
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…
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
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