Homeostasis and Transport Practice

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Front

What is the hydrophilic portion of a phospholipid?

Back

The hydrophilic portion of a phospholipid is the glycerol, which interacts well with water.

Front

What is the hydrophobic portion of a phospholipid?

Back

The hydrophobic portion of a phospholipid consists of fatty acids, which repel water.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane using energy, typically against a concentration gradient.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane proteins.

Front

What is endocytosis?

Back

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

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials to the outside environment.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.