Mr. Kanawyer Bio- Unit 2: Molecules and Cells- Test

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process that helps move particles across a cell membrane with the help of special proteins, without the need for energy.

Front

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

Back

A selectively permeable cell membrane allows certain substances to enter or leave the cell while restricting others.

Front

How do large particles enter a cell?

Back

Large particles enter a cell through a process called endocytosis.

Front

Which type of molecules can move through a cell membrane via simple diffusion?

Back

Very small or non-polar molecules can move through a cell membrane via simple diffusion.

Front

What is osmosis?

Back

Osmosis is the process by which water diffuses across a selectively permeable membrane.

Front

What is the difference between active transport and passive transport?

Back

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

Front

What is the role of proteins in facilitated diffusion?

Back

Proteins act as channels or carriers that help specific molecules cross the cell membrane during facilitated diffusion.

Front

What is the significance of equilibrium in cellular processes?

Back

Equilibrium refers to a state where the concentration of substances is equal on both sides of a membrane, which is important for maintaining homeostasis.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf large particles or liquids, bringing them into the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel materials, packaging them in vesicles that fuse with the cell membrane.