Cell Membrane 1
What primarily makes up the bilayer in a cell membrane?
Phospholipid bilayer (Heads and Tails)
The two types of transport
Active, Passive
This Type of transport requires energy
Active
This transport does not require energy
Passive
These things penetrate the hydrophobic interior of the lipid bilayer
Proteins
Term for something that 'water loving'
Hydrophillic
What is the job of cholesterols?
Stabilize the membrane
regulate fluidity
reduces permeability
What is the job of the phospholipid bilayer?
To maintain integrity of the membrane.
Proteins that are permanent in the membrane
Integral Proteins
Part of the cell membrane that like water
Phosphate Heads
Term for something that is 'water hating'
Hydrophobic
The movement of a substance with its concentration gradient
Passive Transport
The movement of a substance against its concentration gradient
What is active transport?
Proteins with a carbohydrate attached
Glycoproteins
part of the cell membrane that repels water?
Fatty Acid (lipid) Tails
Water Molecules moving across the membrane
Osmosis
describes the cell membrane as a flexible, two-dimensional "fluid" that contains a "mosaic" of various components
Fluid Mosaic Model
The membrane only allows some things through, meaning the membrane is ___________
Semi-permeable
Proteins that penetrate both sides of the membrane
Transmembrane proteins
What helps maintain the flexibility of the membrane?
Glycolipids/Cholesterol
The movement of molecules of any substance so that they spread out evenly into the available space
Facilitated Diffusion
These things CAN NOT pass through the cell membrane
Glucose, Sucrose, Ions
These things CAN pass through the cell membrane
Gases, Vitamins