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Flashcards in Plasma Membrane Transport Deck (18):
0

What is diffusion

Spreading out of particles down a concentration gradient from an area of high concentration to an area of low concentration until uniformly distributed

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What is passive transport

Any process by which substances enter or leave a cell that do not require the cell to expend its own energy

2

What is active transport

Any process of membrane transport in which a substance moves up its concentration gradient as a result of the cell expending its own energy usually but not always in the form of ATP

3

What is concentration gradient

A region along which the concentration of a particular substance increases or decreases from one end to the other

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What is concentration

A measure of the abundance of a substance as a function of total volume within a mixture

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What is a integral proteins

A membrane protein that passes all the way through lipid bilayer of a membrane

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What is a peripheral protein

A membrane proteins that is loosely bound to the inner and outer surface of the membrane either Through a small hydrophobic region or connections to an integral protein embedded in the bilayer

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What is Solute

A substance that creates a solution when dissolved in a solvent

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What is a solvent

A substance that dissolves a solute to create a solution

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What is a Vesicle

A small bubble with in a cell a type of organelle that stores and transports cellar products and digest metabolic waste within cell

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What Is osmosis

The diffusion of water across a semi permeable membrane from an area of low solute concentration to an area of high solute concentration. the force exerted by water moving osmotically is called osmotic pressure

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What does is isotonic solution

Concentration of solutes are the same on both sides allows red blood cells to maintain shape

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What is the solution hypotonic

Lower concentration of solutes than the cystol inside red blood cells water enters faster than they leave causing the cell to shrivel

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What does a hypertonic solution

Higher concentration then the Cystol inside red blood cells. water moves out of cell faster than they enter. Causing the cell to explode

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What does the sodium potassium exchange pump do

3 sodium ions are expelled from cell and 2 potassiums are imported from cell per ATP

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What are leakage channels

Always open

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What are gated proteins

Open or closed. Holes in membrane only certain substances can pass through

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Carrier proteins

Binding changing shape to move molecule. Notes from high to low and membering