4. CATEGORIES OF TRANSPORT
PROCESSES
I. PASSIVE TRANSPOT – Simple diffusion,
Facilitated diffusion, Osmosis, Filtration, Bulk
flow & Solvent drag
II. ACTIVE TRANSPORT – Primary & Secondary
VESICULAR TRANSPORT – Endocytosis,
Exocytosis & Transcytosis
III. TRANSPORT ACROSS EPITHELIA –
Trans cellular & Para cellular
ULTRAFILTRATION
5. ACTIVE TRANSPOT
Uphill transport
Utilizes metabolic energy
Exhibits saturation kinetics
TYPES
1. Primary Active Transport
2. Secondary Active Transport
6. PRIMARY ACTIVE TRANSPORT
• Directly uses metabolic energy for the
transport process
ION TRANSPORTING ATPases :
P-type ATPases / E1-E2 ATPases
V-type ATPases
F-type ATPases
13. CaATPase:
PMCA
SERCAs
H-K ATPase:
Proton pump in Parietal cells
Acidification of urine
H ATPase:
V-type ATPase in lysosomes & ER
F-type ATPase in Inner Mitochondrial
membrane
20. 2. EXCHANGERS / ANTIPORTERS
• Move driving solute in one direction & driven
solute in opposite direction
21. 2. EXCHANGERS / ANTIPORTERS
• Move driving solute in one direction & driven
solute in opposite direction
Na-Ca exchanger (NCX) Na-H exchanger (NHE)