mechanism of nutrient transport

1. NITHYA K
NATURAL SCIENCE

2. WELCOME

3. SIMPLE DIFFUSION
 Movement occurs from higher concentration
to lower concentration.
 No carrier protein required.
 Passive (no energy required)
 Very small and liquid soluble molecules can
pass through this.

4. FACTORS AFFECTING DIFFUSION
• Gradient of concentration
• Permeability of the membrane separating
them.
• Temperature
• pressure

6. FACILITATED DIFFUSION
• Movement from higher concentration to
lower concentration.
• Carrier protein required.
• Passive(no energy required).
• Large and charged molecules can pass through
this.

8. ACTIVE TRANSPORT
• Movement from low concentration to high
concentration.
• Also known as ‘uphill transport’.
• Carrier protein required.
• Energy(ATP) is required.
• It is for large and charged molecules.

10. OSMOSIS
• It is the diffusion of water across a semi
permeable membrane.
• It’s direction and rate are depend upon
pressure gradient and concentration gradient.
• Water moves from region of higher
concentration to lower concentration until
equilibrium is reached.

12. THANK YOU