2 Passive and Active Transport

Passive transport

Ions and molecules are moved across the membrane without any energy by the cell

Simple diffusion

Molecules move across phospholipid bilayer

Gradient of diffusion

High concentration to low concentration

Example of diffusion molecules

O2 and CO2

Facilitated diffusion

Large molecules moving through protein channels opened by a hormone

Gradient of facilitated diffusion

High concentration to low concentration

Examples of ions for facilitated diffusion

Na+ and K+ and glucose

Active transport

The process that moves materials across the plasma membrane and requires ATP

3 kinds of active transport

Protein pumps, endocytosis, and exocytosis

Gradient of active transport

Low to high concentration

ATL turns into —- after it is used

ADP

ATP

Adenosine Triphosphate

Endocytosis

When a cell actively takes large molecules into itself by folding itself inward creating a vehicle

Exocytosis

When a cell actively releases large molecules by unfolding the plasma membrane outward

Ex of endocytosis

Phagocytosis

Ex of Exocytosis

Release of hormones into body

Endocytosis

Exocytosis

A=

Diffuson

B=

Facilitated diffuson

C=

Active transport

D=

Passive transport