Unit 2B Vocab

Front

Active Transport

Back

The movement of molecules across a cell membrane using energy from the cell, often against a concentration gradient.

Front

Cell Membrane

Back

A semipermeable barrier that surrounds the cell, controlling what enters and leaves.

Front

Cell Wall

Back

A rigid layer found outside the cell membrane in plants, fungi, and some bacteria that provides structure and protection.

Front

Centriole

Back

A cylindrical structure in animal cells that helps organize microtubules during cell division.

Front

Chloroplasts

Back

Organelles in plant cells where photosynthesis occurs; contain chlorophyll.

Front

Cilia

Back

Short, hair-like projections on some cells that help with movement or moving substances along the cell surface.

Front

Cytoplasm

Back

The jelly-like fluid inside a cell where organelles are suspended and chemical reactions occur.

Front

Diffusion

Back

The passive movement of molecules from high concentration to low concentration.

Front

Endoplasmic Reticulum (ER)

Back

A network of membranes in eukaryotic cells that produces, processes, and transports proteins and lipids.

Front

Rough ER

Back

Studded with ribosomes; makes proteins.