Cell Membrane 1
What 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
Where is the cell membrane on a cell?
Inside the cell wall (Plant Cells), Outside the cell (Animal Cells)
What is the job of cholesterols?
Stabilize the membrane and regulate fluidity
What is the job of the phospholipid bilayer?
To maintain integrity of the membrane.
These attract water
Bilayer Heads
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
Water Molecules moving across the membrane
What is 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 certain things through, meaning the membrane is ___________
Selectively Permeable
These things penetrate the hydrophobic interior of the lipid bilayer
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