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Biology

Diffusion, Osmosis and Cellular Transport

QuestionAnswer
True or false: During diffusion, molecules diffuse from a region where their concentration is low to a region where their concentration is higher, until the particles are evenly dispersed. True
True or false: When the concentration of dissolved particles outside a cell is equal to the concentration of dissolved particles inside the cell, the cell solution is isotonic. True
True or false: Membranes are selectively permeable if they allow only certain substances to move across them. True
What is osmosis? Diffusion of starch molecules through a selectively permeable membrane?
True or false: Passive transport uses energy (ATP) to move molecules against their concentration gradient. False
True or false: In active transport, energy is required to move a substance across a cell membrane. True
What is the diffusion of water into or out of a cell called? Osmosis
What is diffusion? Movement of a substance from an area of high concentration to an area of low concentration
What is the result of diffusion for concentration? The concentration of many types of substances eventually becomes balanced on both sides of a membrane.
What type of cellular transport is osmosis? Passive transport
What type of solution does a cell swell in? Hypotonic solution
What transportation do sugar molecules cross the cell membrane by? Facilitated diffusion
What does active transport require that passive transport doesn't? Energy
What types of proteins are involved in facilitated diffusion Carrier proteins?
What doesn't require energy? Diffusion
What is one function of the cell membrane? Regulates which materials enter and leave the cell
The cell membrane contains channels and pumps that help move materials from one side to the other. What are these channels and pumps made of? Proteins
Why does diffusion occur? Molecules constantly move and collide with each other
Created by: erynellis
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