Question

Facilitated diffusion across a membrane requires and moves a solute __ its concentration gradient. a. transport proteins... up (against) b. transport proteins... down c. energy and transport proteins... up d. energy and transport proteins... down

Name: Problem 7, Chapter 5: Campbell Biology Concepts & Connections
Uploaded: 2020-05-01T20:11:58-08:00
Duration: 2 min
Channel: Andrei Demkov
Description: Facilitated diffusion across a membrane requires and moves a solute its concentration gradient. a. transport proteins... up (against) b. transport proteins... down c. energy and transport proteins... up d. energy and transport proteins... down

   Facilitated diffusion across a membrane requires ______ and moves a solute ________ its concentration gradient.
a. transport proteins... up (against)
b. transport proteins... down
c. energy and transport proteins... up
d. energy and transport proteins... down

Campbell Biology Concepts & Connections

Martha R. Taylor,… 9th Edition

Chapter 5, Problem 7

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Solved by Expert Andrei Demkov

05/01/2020

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Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special transport proteins. Show more…

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Facilitated diffusion across a membrane requires ______ and moves a solute ________ its concentration gradient. a. transport proteins... up (against) b. transport proteins... down c. energy and transport proteins... up d. energy and transport proteins... down

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Key Concepts

Facilitated Diffusion

Facilitated diffusion is a type of passive transport that allows molecules to move across a cell membrane with the assistance of transport proteins. This process occurs without the expenditure of cellular energy, as it relies solely on the concentration gradient of the molecules.

Transport Proteins

Transport proteins are integral membrane proteins that provide channels or carriers to help move substances across a cell membrane. In facilitated diffusion, these proteins enable the movement of molecules that cannot directly pass through the lipid bilayer due to their size or polarity.

Concentration Gradient

A concentration gradient refers to the difference in concentration of a substance across a space or membrane. In the context of facilitated diffusion, molecules move from an area of higher concentration to an area of lower concentration, driven by this gradient rather than by energy input.

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