Cell Membrane Structure and Function

CELL STRUCTURE AND FUNCTION Dr Meera Narasimha, ICFAI University, Hyderabad CHAPTER- 4

II. Out Line: ,[object Object],[object Object],[object Object],[object Object]

GETTING THROUGH MEMBRANES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fluidity ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object]

Fluidity Influences Permeability: ,[object Object],[object Object]

Cell Membrane is semi permeable ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cell recognize signal and respond to Signal ,[object Object],[object Object],[object Object],[object Object],[object Object]

Concentration Gradient ,[object Object],[object Object],[object Object]

DIFFUSION ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Direction of Diffusion: ,[object Object],[object Object],[object Object],[object Object]

Passive Transport Mechanism : ,[object Object],[object Object],[object Object]

No Conc. Gradient=Dynamic Equilibrium ( Movement of molecules is equal in all directions). ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Selectively permeability of Membrane: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DIALYSIS : ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Osmosis : ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Osmotic Pressure: Pressure exerted on a membrane due to an imbalance of solute between the inside and outside of the membrane

Osmosis: Net movement (Diffusion) of Water through a selectively permeable membrane. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Water: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Hypertonic vs. Hypotonic ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Physiological relevance of Osmosis

Isotonic Hypertonic Hypotonic

Tonicity : The ability of a solution to move water ,[object Object],[object Object],[object Object]

DRINKING WATER ,[object Object],[object Object]

Osmosis in Animal and Plant Cells

Transport of Molecules: Controlled Methods ,[object Object],[object Object],[object Object],[object Object],[object Object]

A. Facilitated Diffusion ,[object Object],[object Object],[object Object],[object Object],[object Object]

Facilitated diffusion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

B. Active Transport ,[object Object],[object Object],[object Object],[object Object],[object Object]

Active transport ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Kinds of Pumps ,[object Object],[object Object],[object Object],Some pumps create electrical differences across a membrane ( electrogenic pumps )

Exocytosis and Endocytosis ,[object Object],[object Object],[object Object],[object Object],[object Object]

Endocytosis : ,[object Object],[object Object],[object Object]

Phagocytosis : A kind of endocytosis is a process cells use to wrap membrane around a particle and engulf it. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Signal Transduction: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Signal Transduction : ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Signal Transduction: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cell Size : ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Cell Size ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Surface Area to Volume Ratio: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Surface area to Volume Ratio ,[object Object],[object Object],[object Object],[object Object]

Cell Size ,[object Object],[object Object],[object Object]

Acknowledgements ,[object Object]

Cell Membrane Structure and Function

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