STRUCTUE OF MEMBRANE CELL

Transport of substances through the membrane

1. Passive transport2. Transport active

1. Passive transport divided into:Diffusion Movement of molecules or substances of high

density (hypertonic) to low-density areas (hipotonis).

Diffusion assisted

Diffusion assisted is diffusion process with intermediate protein (carrier protein) .

Mechanism Of Diffusion assisted

Osmosis

Osmosis is a process of displacement or movement of solvent molecules from the solution of high concentration of the solvent to the solution of low concentration of the solvent through membrane selectively permeable or semi-permeable .

• Osmosis can maintain equilibrium solution inside and outside the cell

Active transport :

Active transport is the transport of particles moving through a semipermeable membrane against a concentration gradient that requires energy in the form of ATP

2. Active transport divided into:

EndocytosisImportation process of particle or liquid into the cell through the membrane :

Endocytosis divided into:A. Phagocytosis

Importation event of solid into the cell .

B. Pynocytosismovement that brought in the liquid material, in particular the extracellular fluid.

Exocytosis the release of a substance outside the cell. All the process of secretion in the body is the process of exocytosis.