Shared Flashcard Set

Details

Ch. 05 Membrane Structure Synthesis & Transport (Biology 1A)
N/A
11
Biology
Undergraduate 1
04/28/2012

Additional Biology Flashcards

 


 

Cards

Term
Amphipathic nature of phospholipids
Definition
Have a hydrophobic (nonpolar) region and Hydrophilic (polar) fatty acyl tails. The talis face each other and form the interior of the membrane.
Term
Membrane is semi-fluid because...
Definition
The lipids and proteins embedded in the layer can move freely relative to one another. (fluid-mosaic model)
Term
Hypertonic solution
Definition
Any solution that causes a cell to shrink due to osmosis of water leaving the cell
Term
Hypotonic solution
Definition
Any solution the causes a cell to swell when placed in it.
Term
Isotonic solution
Definition
Conditions in which the solute concentrations are on both sides of the plasma membrane are equal. (cell does not shrink of swell)
Term
Passive transport
Definition
The transport of a substance across a membrane from a region of high concentration to a region of lower concentration.
Term
Active transport
Definition
Moves a substance from an area of low concentration to high concentration of against the chemical gradient with the aide of a transport protein.
Term
Facilitated diffusion
Definition
A transport protein provides a passageway for the substance to cross the membrane.
Term
Diffusion
Definition
When a substance moves across a membrane from an area of high concentration to an area of lower concentration.
Term
Osmosis
Definition
The movement of water across membranes to balance solute concentrations. Water diffuses from a solution that it hypotonic to hypertonic.
Term
End of chapter 5
Definition
Beginning of chapter 6
Supporting users have an ad free experience!