Unit 2 Flashcards
Def: Plasma membrane
a layer that covers the surface of the cell and protects it from leaking.
Def: Transport proteins
Protein channels embedded in the membrane so charged particles can pass through.
Def: Active transport proteins
Protein channels move particles against their concentration gradient with energy.
Def: Enzyme function
Helps to speed up chemical reactions.
Def: Attachment proteins
anchoring sites on the cell where the cytoskeleton attaches.
Def: Receptor proteins
Allow for cells to communicate with one another by sending chemical signals.
Def: Junction protein
Help attach cells to one another for function of tissues.
Def: Glyco-Protein
Is an “ID tag” for the cell and allows for the cells to recognize it as apart of the body.
Def: Diffusion
The tendency for particles to even out in any available space.
Def: Osmosis
Diffusion of water across a selectively permeable membrane.
Def: Tonicity
The general concentration of solutes in water in any solution.
Def: Hypertonic
A solution that has a higher concentration of solutes.
Def: Hypotonic
Solution has a lower concentration of solutes.
Def: Isotonic
Both sides are equal in solute concentration.
Def: Passive transport
Diffusion of charged/polar substances across the membrane from high to low concentration without energy.
