homeostasis

Passive Transport is the movement of molecules with the concentration gradient

active transport:moves against the gradient
moves from high to low
and requires ATP_

  1. protein pumps:works against the gradient and requires atp

Movement from high to low.

Diffusion: Movement from high concentration to low concentration

  1. endocytosis: the movement of the cell membrane to bring molecules into the cell
  1. exocytosis: Fusing of the cell membrane with the vesicle to remove molecules from the cell

Facilitated diffusion: Diffusion of large molecules, needs help from membrane protein

Osmosis: movement of water across membrane from high to low

cell membrane

controls what enters and exits the cell

Tonicity

properties that help it are...

Hypertonic: More concentration outside of the cell . Causes cell to shrink

  1. it is flexible

2.selectively permeable

3.makes lipids and protein

  1. self sealing

Hypotonic: Less concentration on the outside of the cell. Causes cell to swell

  1. helps maintain homeostasis

Isotonic: The same amount of concentration inside and outside of cell. Cell will not change