Cell Transport and Membranes

Front

Something is ___________ ____________ when some molecules can cross the membrane while others cannot.

Back

Selectively (or Semi) Permeable.

Front

This cellular structure helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

Back

Cell membrane.

Front

What is the primary function of the cell membrane?

Back

To control the movement of substances in and out of the cell.

Front

Which part of a phospholipid is hydrophobic?

Back

Fatty lipid tails.

Front

What is the role of the cell wall in plant cells?

Back

To provide structure and support.

Front

Define diffusion in the context of cell transport.

Back

The movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

The diffusion of water across a selectively permeable membrane.

Front

What does it mean for a membrane to be selectively permeable?

Back

It allows certain substances to pass while blocking others.

Front

What is the function of transport proteins in the cell membrane?

Back

To facilitate the movement of substances across the membrane.

Front

What is active transport?

Back

The movement of molecules against their concentration gradient, requiring energy.