Unit 6: Cellular Membrane & Transport Review

Front

What is the structure of the cellular membrane?

Back

The cellular membrane is primarily composed of a phospholipid bilayer, which includes hydrophilic phosphate heads and hydrophobic fatty acid tails.

Front

What is the function of the phospholipid bilayer?

Back

The phospholipid bilayer serves as a barrier that regulates the movement of substances in and out of the cell.

Front

Define exocytosis.

Back

Exocytosis is the process by which cells expel materials in vesicles that fuse with the plasma membrane.

Front

What happens to a red blood cell in a hypotonic solution?

Back

In a hypotonic solution, a red blood cell will swell and may burst due to the influx of water.

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 osmosis?

Back

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

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to lose water and shrink.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

What role do proteins play in the cellular membrane?

Back

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

Front

What is facilitated diffusion?

Back

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