Cell Membrane Transport

Front

What is the primary component of the cell membrane?

Back

Lipids are the primary component of the cell membrane, forming a bilayer that provides structure and flexibility.

Front

What are the two main parts of a phospholipid?

Back

The two main parts of a phospholipid are the hydrophilic head and the hydrophobic tail.

Front

What does hydrophobic mean in the context of cell membranes?

Back

Hydrophobic refers to the property of molecules that repel water; in cell membranes, the hydrophobic tails of phospholipids face inward, away from water.

Front

What is a prokaryote?

Back

A prokaryote is a single-celled organism that lacks a nucleus, such as bacteria.

Front

What is the difference between hypertonic, hypotonic, and isotonic solutions?

Back

Hypertonic solutions have a higher concentration of solute particles than the cell, hypotonic solutions have a lower concentration, and isotonic solutions have equal concentrations.

Front

What is osmosis?

Back

Osmosis is the movement of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane assist in transport, act as receptors, and provide structural support.

Front

What is the fluid mosaic model?

Back

The fluid mosaic model describes the cell membrane as a flexible layer made of lipid molecules with embedded proteins, allowing for movement and interaction.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules pass through the cell membrane via protein channels without the use of energy.

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.