Cell structure and function vocab

Cell theory

The scientific explanation describing cells as the basic unit of life.

Prokaryotic

A cell that lacks a nucleus.

Eukaryotic

A cell that contains a nucleus and membrane-bound organelles.

Organelle

A structure within a cell that performs a specific job.

Homeostasis

The process of maintaining stable internal conditions.

Selectively Premeable

A membrane that allows some materials to pass while blocking others.

Diffusion

The movement of particles from high concentration to low concentration.

Osmosis

The movement of water across a membrane.

Active transport

Movement of materials that requires energy.

Equilibrium.

A state where molecules continue moving but are evenly distributed.

Nucleus

Main function and organelle

Main function: controls cell activity and contains DNA

Organelle: Vacoule - stores water nutrients and waste

Ribosome

Main function: Makes proteins

Organelle: Golgi Apparatus - packages and distributes proteins and other materials.

Mitochondria

Main function: produces energy for the cell

Organelle: Endoplasmic Reticulum - makes and transports lipids and proteins.

Cell membrane

Main function: Controls what exits and leaves the cell.

Organelle: Lysosome - breaks down waste and old down materials.

REMEMBER

Only diffusion, facilitated diffusion, and osmosis are passive. Everything else is active. ACE THE TEST HANNAH.