The document discusses membrane transport mechanisms in biology, detailing categories such as passive and active transport, as well as various processes like diffusion, facilitated diffusion, filtration, and osmosis. It explains key concepts related to each transport type, including concentration gradients and the behavior of water in different solute conditions (hypertonic, hypotonic, isotonic). The author, Ruhid Hasan, invites readers to reach out with any questions.

1. Prepared by Ruhid Hasan
ID: 031161009
University of Development
Alternative

2. WHAT IS
TRANSPORT SYSTEM?
• In biology, membrane transport refers to
the collection of mechanisms that regulate
the passage of solutes such as ions and
small molecules through biological
membranes, which are lipid bilayers that
contain proteins embedded in them.

3. CLASSIFICATION
OF
TRANSPORT SYSTEM
• Passive Transport
• Active Transport
• Carrier-Madiated Transport
• Vesicular Transport
• Pore Transport
• Ion-pair formation Transport

4. • Passive transport is a movement of ions and
other atomic or molecular substances across cell
membranes without need of energy input.

5. DIFFUSION
• Diffusion is the net movement of material
from an area of high concentration to an area
with lower concentration. The difference of
concentration between the two areas is often
termed as the concentration gradient, and
diffusion will continue until this gradient has
been eliminated.

6. FACILITATED DIFFUSION
• Facilitated diffusion, also called
carrier-mediated osmosis, is the
movement of molecules across the cell
membrane via special transport
proteins that are embheir plasma
membrane by actively taking up or
excluding ions.

7. FILTRATION
• Filtration is movement of water and solute
molecules across the cell membrane due to
hydrostatic pressure generated by the
cardiovascular system. Depending on the size
of the membrane pores, only solutes of a
certain size may pass through it. For example,
the membrane pores of the Bowman's capsule
in the kidneys

8. OSMOSIS
Osmosis is the movement of water molecules across a selectively permeable
membrane. The net movement of water molecules through a partially
permeable membrane from a solution of high water potential to an area of
low water potential.

9. TYPE OF OSMOSIS TRANSPORT
equilibrium -all molecules occupy the same amount of space
Hypertonic -concentration outside the cell is
higher than inside. Water will move out of the cell
to create equilibrium.
Hypotonic -concentration of solutes outside the cell is lower than the
concentration inside. Water will move into the cell to create
equilibrium.
Isotonic Solution - Solute and water concentrations equal on
both sides of membrane. Water will move both ways randomly to
maintain equilibrium.

10. Do you have any query or Questions?
Then you Can contact me
Name: Ruhid Hasan
ID: 031161009
Batch: 48th
Semester: 7th

11. FOR BEING PATIENTS