Chapter 7 Flashcards
Cell membrane purpose
To regulate the ongoing exchange of intracellular and extracellular environments
Benefits of cell membranes
Makes it possible for cells to get vital raw material like oxygen, sugars, amino acids,→ can rid themselves of waste and maintain a healthy electrical balance
What are two passive means of exchange
Diffusion and osmosis
Osmosis only occurs with
Water
Simple vs facilitated diffusion
Simple diffusion occurs across the membrane but facilitated diffusion occurs through a selective transport proteins
Active transport needs
ATP and protein to carry out their task
Pinocytosis
The process where a cell engulfs water
Phagocytosis
Engulfs solid object like pathogens
Endocytosis
Cholesterol is picked up by liver cells using this method
Fluid mosaic model
The molecular arrangement of the cell membrane
Exocytosis
Expels contents to the outside of the cell
Simple diffusion
Movement of molecules down the concentration gradient
Phospholipids have a……
Hydrophilic head and a hydrophobic body
Intracellular compartment
The fluid inside of the coll
