Biology Unit 3 Part 1 (For Final Review)

Front

What is the rigid layer that lies outside the plasma membrane in plant cells?

Back

Cell wall - it provides structure and protection.

Front

What will diffusion eventually result in when red molecules can travel through a semi-permeable membrane?

Back

Equal concentrations on both sides of the semi-permeable membrane.

Front

If a cell is placed in a fresh water solution, what will happen to the water movement?

Back

Water will move into the cell, causing it to swell.

Front

What type of transport is characterized by the movement of molecules against their concentration gradient using energy?

Back

Active Transport Pump.

Front

What is homeostasis?

Back

The maintenance of a relatively stable internal environment.

Front

What is the function of the cell membrane?

Back

It regulates what enters and leaves the cell, providing protection and support.

Front

Define osmosis.

Back

The diffusion of water across a semi-permeable membrane.

Front

What is facilitated diffusion?

Back

A process that allows substances to cross membranes with the assistance of special proteins.

Front

What happens to a cell in a hypertonic solution?

Back

Water moves out of the cell, causing it to shrivel.

Front

What is the role of the nucleus in a cell?

Back

It acts as the control center, housing the cell's DNA.