Unit 2 Review

Front

What is a heterotroph?

Back

An organism that cannot produce its own food and must consume other organisms for energy, e.g., a panda.

Front

What happens to red blood cells when water moves in and out at the same rate?

Back

The cells remain in equilibrium, maintaining their shape and function.

Front

What is active transport?

Back

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is passive transport?

Back

The movement of molecules across a cell membrane without the use of energy, typically from a region of higher concentration to a region of lower concentration.

Front

What is diffusion?

Back

The process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

The diffusion of water molecules through a selectively permeable membrane.

Front

What is a phospholipid?

Back

A type of lipid molecule that is a major component of cell membranes, consisting of a hydrophilic 'head' and two hydrophobic 'tails'.

Front

What does it mean for a molecule to be in equilibrium?

Back

It means that the concentrations of the molecule are equal inside and outside the cell.

Front

What is the role of water in red blood cells?

Back

Water helps maintain the shape and function of red blood cells by balancing the internal and external environments.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.