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Title: Chapter 7 - Membrane Structure and Function
Description: What types of molecules have the easiest time crossing a cell membrane? How do molecules cross a membrane?
Description: What types of molecules have the easiest time crossing a cell membrane? How do molecules cross a membrane?
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Chapter 7:
Membrane Structure and Function
What type of molecule crosses a cell membrane the fastest?
Size
Polarity
Affinity for Water
Ionization
Small
Large
Polar
Nonpolar
Hydrophilic
Hydrophobic
Ionic
Nonionic
CO2
fits all of these characteristics, so it is often transported across cell membranes
...
Tonicity
the ability of a solution to make a cell gain or lose water
Facilitated diffusion
is passive transport (no energy needed) aided by proteins
...
● Ion channels
open/close in response to stimulus
Title: Chapter 7 - Membrane Structure and Function
Description: What types of molecules have the easiest time crossing a cell membrane? How do molecules cross a membrane?
Description: What types of molecules have the easiest time crossing a cell membrane? How do molecules cross a membrane?