Unit 2 Biology: Cell Transport

Process that regulates internal chemical processes to maintain equilibrium, requiring constant adjustments as internal and external conditions change

• Facilitated Diffusion

• Solute

• Active Transport

• Homeostasis

Tags

NGSS.HS-LS1-3

Movement of ions or molecules across a membrane down a concentration gradient ; it does not require the input of energy (example: osmosis)

• Passive transport

• Active Transport

• Facilitated Diffusion

• Exocytosis

Movement of ions or molecules across a membrane, often against a concentration gradient; requires energy input; (example: endocytosis)

• Active Transport

• Homeostasis

• Passive transport

• Solution

Dispersion (spreading out) of substances in a gas or liquid (example: perfume in a room)

• Endocytosis

• Diffusion

• Exocytosis

• Hypertonic

Diffusion of water through a semi-permeable membrane from an area of high water concentration to an area of low water concentration

• Facilitated Diffusion

• Active Transport

• Osmosis

• Solvent

A solution that has a higher osmotic pressure than another solution; it has a concentration of solutes greater than the concentration of solutes in the cells. Water leaves the cell.

• Hypertonic

• Hypotonic

• Isotonic

• Solute

Tags

NGSS.HS-LS1-3

A solution that has a lower osmotic pressure than another solution. Water will enter the cell. Cells will rapidly fill up, become turgid, and may burst.

• Hypertonic

• Hypotonic

• Isotonic

• Facilitated Diffusion

Solution with the same osmotic pressure an another solution. Water moves in both directions across the semipermeable membrane without altering the concentration of solutes on either side.

• Hypertonic

• Hypotonic

• Isotonic

• Facilitated Diffusion

Chemicals that are unable to cross the membrane directly are able to diffuse across the membrane through transport proteins. These proteins facilitate (or “help”) the process of diffusion.

• Hypertonic

• Hypotonic

• Isotonic

• Facilitated Diffusion

A process in which cells take in materials by wrapping a section of plasma membrane around those materials and bringing them into the cell

(example: White blood cells do this to harmful cells)

• Endocytosis

• Exocytosis

• Osmosis

• Homeostasis