Homeostasis and Transport Practice

Front

What happens to an animal cell placed in a hypertonic solution?

Back

The cell would shrink because the solution has a higher concentration of solutes than the cell.

Front

What is the main difference between diffusion and facilitated diffusion?

Back

Facilitated diffusion requires a transport protein to help move particles across the membrane.

Front

What type of transport occurs when particles move from an area of high concentration to an area of low concentration without energy?

Back

Diffusion.

Front

What part of a phospholipid is hydrophobic and repels water?

Back

Fatty acids.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What role do transport proteins play in facilitated diffusion?

Back

Transport proteins help to move specific molecules across the cell membrane without using energy.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move substances against their concentration gradient.

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.