Diffusion vs Active Transport || Transport Through the Cell Membrane || General Physiology
Updated: November 18, 2024
Summary
Diffusion is the spontaneous movement of molecules from an area of high concentration to low concentration, happening either through the cell membrane or carrier proteins. It is a passive process that does not require additional energy input. On the other hand, active transport involves the movement of molecules against their concentration gradient, facilitated by transport proteins and requiring ATP energy. This distinction between diffusion and active transport is essential in understanding how substances move in and out of cells efficiently.
TABLE OF CONTENTS
Explanation of Diffusion
Diffusion is the random movement of molecules down their electrochemical gradient. It can occur through the lipid bilayer or carrier proteins without requiring extra energy.
Introduction to Active Transport
Active transport is the movement of substances against the electrochemical gradient by transport proteins with the need for external energy sources like ATPs.
FAQ
Q: What is diffusion?
A: Diffusion is the random movement of molecules down their electrochemical gradient.
Q: How can diffusion occur?
A: Diffusion can occur through the lipid bilayer or carrier proteins without requiring extra energy.
Q: What is active transport?
A: Active transport is the movement of substances against the electrochemical gradient by transport proteins with the need for external energy sources like ATPs.
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