Chapter 2 BASIC FUNCTIONS OF THE CELL 1.The cell membrane its transport ·Fluid mosaic model Transport across cell membrane Simple diffusion Facilitated diffusion Active transport Secondary active transport Exocytosis endocytosis
Chapter 2 § 1. The cell membrane & its transport • Fluid mosaic model • Transport across cell membrane * Simple diffusion * Facilitated diffusion * Active transport * Secondary active transport * Exocytosis & endocytosis BASIC FUNCTIONS OF THE CELL
Simple diffusion its energy source O2,CO2,NH3,NO,etc. Facilitated diffusion its characteristics Facilitated diffusion via ion channel Chemically gated channel Voltage-gated channel Mechanically gated channel Nat,K+,Ca2+,Cl-channel Facilitated diffusion via carrier Glucose,amino acids,some ions,etc
* Simple diffusion & its energy source O2 , CO2 , NH3 , NO, etc. * Facilitated diffusion & its characteristics Facilitated diffusion via ion channel Chemically gated channel Voltage-gated channel Mechanically gated channel Na+ , K+ , Ca2+, Cl− channel Facilitated diffusion via carrier Glucose, amino acids, some ions, etc
Active transport Sodium-potassium pump its effects Other pumps:calcium pump,proton pump Secondary active transport Membrane protein:pump+transporter Forms:symport antiport Exocytosis endocytosis Exocytosis:cell secretion Endocytosis:phagocytosis Receptor mediated endocytosis
* Active transport Sodium-potassium pump & its effects Other pumps: calcium pump, proton pump * Secondary active transport Membrane protein: pump+transporter Forms: symport & antiport * Exocytosis & endocytosis Exocytosis: cell secretion Endocytosis: phagocytosis Receptor mediated endocytosis