Cell Membrane and Cell Transport

Front

What is osmosis?

Back

Osmosis is the diffusion/movement of water across a semipermeable membrane.

Front

What role do carbohydrates play in cell membranes?

Back

Carbohydrates allow cells to recognize each other and act like ID tags.

Front

What is active transport?

Back

Active transport is the cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration, requiring energy.

Front

Which particles can diffuse through the phospholipid bilayer?

Back

Oxygen and carbon dioxide can diffuse through the phospholipid bilayer.

Front

What is endocytosis?

Back

Endocytosis is the process by which the cell membrane surrounds a particle and encloses it to bring it into the cell, typically for large particles.

Front

What is the structure of the cell membrane?

Back

The cell membrane is primarily composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates.

Front

What is the function of membrane proteins?

Back

Membrane proteins facilitate transport, act as receptors, and provide structural support.

Front

What is the difference between passive and active transport?

Back

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

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move substances across the cell membrane.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a flexible structure with various proteins floating in or on the fluid lipid bilayer, allowing for dynamic interactions.