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42 Cards in this Set

  • Front
  • Back

Plasma membrain is..

Semi-permeable

Selectivly allows molecules to pass through

Semi permeable

Fatty acids within a plasma membrain

Both saturated and unsaturated

Proteins that specialized in moving molecules across a membrain

Transport protein.

Difference in the solute concentration between two areas

Concentration gradient

Movement of molecules across membrain without energy

Passive transport

Phospholipid bilayer is...

Semi-permeable

Movement of small hydrophobic non-pilot molecules through membrain, requires no energy

Pasive transport-simple diffusion

Proteins that act as transporters to move

Passive transport- facilitated diffusion

Types of protein channels

Gated and leak channels

Leak channel

Always open

Only let's specific molecules inside the cell.

Gated channel

Movement of water molecules through the membrain

Osmosis

Protein channel that water moves through- form of osmosis

Aquaporin

Amount of solutes within or outside the cell

Osmolarity

Types of solutes

Hypotonic solution, isotonic, hypertonic

More solute inside the cell. Water is going to enter the cell.

Hypotonic solution

Equal amount of solutes, water moves in and out of cell.

Isotonic solution

Less solute inside the cell, water will be leaving the cell.

Hypertonic solution

Requires energy for movement across membranes

Active transport

Active transport moves________

Against the concentration gradient

Energy that active transport uses

ATP

Forms of bulk transport

Endocytosis, Exocytosis

Exocytosis

Exiting the cell

Endocytosis

Entering the cell

Vesicles bring molecules to exit the cell

Exocytosis

Transports Large molecules/ sunstances using vacuoles

Phagocytosis

Transports Small molecules/ substances into the cell using vesicles.

Pinocytosis

Protein pump uses ATP to change shape allowed for transportation of the molecule through the membrane

Primary active transport

Types of pumps for cell transport

Uniport, symport, antiport

Transfers one molecule in one direction.

Uniport

Symport

Transfers two molecules in same direction.

Transfers two molecules in different directions

Antiport

Transports 3 sodium out of cell and 2 potassium into cell using ATP

Sodium potassium pump

Because sodium is being pushed through the sodium potassium pump, it drives a glucose through against its concentration gradient using momentum.

Secondary active transport

There is a potential difference in voltage across their plasma membrain due to a combination of the pumps and leak channels.

Membrane potential

The potential of a cell when its at rest

Resting membrain potential

A cell wants to be __________ on the inside

Negative

Cells that send out a lot of signals and has a lot of functions

Excitable

Cells that do not do very much.

Non-excitable

Amount of pumps in an average neuron

1,000,000 pumps

Can be opened or closed depending a change in environment within the cell either

Gated channels