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Matthew’s practice

Lesson 4 flash cards for SCI miss Blackburn

TermDefinition
Selectively permeable A membrane allows specific molecules or ions to pass through it while blocking others.
Passive transport The movement of substances across a cell membrane.
Diffusion The net movement of particles.
Osmosis A process by which molecules of a solvent tend to pass through a semipermeable membrane.
Active transport The cellular process of moving molecules or ions across a cell membrane against their concentration gradient.
How materials move in and out of cells Mainly through Passive Transport (no energy, down concentration gradient: diffusion, osmosis, facilitated diffusion) and Active Transport (requires energy, against gradient: pumps, endocytosis, exocytosis.
The different types of membrane transport Mainly categorized as Passive Transport (no energy, down gradient: simple diffusion, osmosis, facilitated diffusion) and Active Transport (needs energy/ATP, against gradient: pumps, bulk transport like endo/exocytosis).
The difference between facilitated diffusion and diffusion The main difference is that simple diffusion moves small, nonpolar molecules (like \(\text{O}_{2}\), \(\text{CO}_{2}\)) directly through the cell membrane, while
Created by: user-1996634
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