Cell transport

Front

What is the hydrophobic region of the cell membrane?

Back

The hydrophobic region of the cell membrane consists of the fatty acid tails of phospholipids, which repel water and create a barrier to most water-soluble substances.

Front

Passive transport is when molecules move ________ the concentration gradient.

Back

with

Front

What type of solution causes a plant cell to lose water and become plasmolyzed?

Back

hypertonic

Front

What type of transport occurs when molecules move against the concentration gradient?

Back

active transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules pass through the cell membrane via protein channels from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

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

Front

Define isotonic solution.

Back

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

Front

What is the role of transport proteins in the cell membrane?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water enters the cell, causing it to swell and potentially burst.

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 down their concentration gradient.