Which of the following processes requires the cell to expend...

Name: Problem 5, Chapter 5: Biology
Uploaded: 2021-12-13T20:19:51-08:00
Duration: 52 s
Channel: Hunza Gilgit
Description: Which of the following processes requires the cell to expend metabolic energy directly (for example, from ATP)? (a) active transport (b) facilitated diffusion (c) all forms of carrier-mediated transport (d) osmosis (e) simple diffusion

Which of the following processes requires the cell to expend metabolic energy directly (for example, from ATP)? (a) active transport (b) facilitated diffusion (c) all forms of carrier-mediated transport (d) osmosis (e) simple diffusion

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Key Concepts

Facilitated Diffusion

Facilitated diffusion is a type of passive transport that involves specific transmembrane proteins to aid in the movement of molecules down their concentration gradient. Unlike active transport, this process does not require the direct input of metabolic energy and relies solely on the existing concentration gradient for molecular movement.

Passive Transport

Passive transport describes the movement of molecules across cell membranes along their concentration gradient without the use of metabolic energy. This category includes processes such as simple diffusion, facilitated diffusion, and osmosis, where the driving force is the natural kinetic energy of molecules or osmotic pressure differences.

Active Transport

Active transport is a cellular mechanism in which molecules or ions are moved across a cell membrane against their concentration gradient. This process requires the direct expenditure of metabolic energy, typically in the form of ATP, to function. Active transport is essential for maintaining concentration gradients that are necessary for various cellular functions and homeostasis.

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