Cell Transport and Cell Division Quiz

Simple diffusion is the movement of molecules from an area of high concentration to an area of low concentration, without the need for a specific protein channel. Facilitated diffusion, on the other hand, requires the assistance of specific protein channels to move molecules across the cell membrane.

ATP (adenosine triphosphate) is the energy currency of cells. In active transport, ATP is used to fuel the movement of molecules against their concentration gradient, from an area of low concentration to an area of high concentration. ATP provides the energy needed to change the conformation of protein pumps and transport the molecules across the cell membrane.

A hypotonic solution has a lower solute concentration compared to the cytoplasm of a cell. In this solution, water moves into the cell, causing it to swell or potentially burst. A hypertonic solution has a higher solute concentration compared to the cytoplasm of a cell. In this solution, water moves out of the cell, causing it to shrink or shrivel. An isotonic solution has an equal solute concentration compared to the cytoplasm of a cell. In this solution, there is no net movement of water, resulting in a stable cell volume.

<p>Simple diffusion</p> Signup and view all the answers

<p>Facilitated diffusion</p> Signup and view all the answers

<p>Osmosis</p> Signup and view all the answers