as the 4. Movement of substances within and between body fluids, sometimes acros

Question

as the 4. Movement of substances within and between body fluids, sometimes across a barrier such as the cell membrane is essential to normal physiology. Mention the direction, requirement and one example of substance transported by the following transport systems. by the following transport ntion the direction, requirsa Requirement [Carrier molecule and cell energy] Example [Ions, Direction [Low to Transport system [Active transport i acids] concentration] 4.1 Simple Diffusion 4.2 Facilitated diffusion 4.3 Osmosis 4.4 Hydrostatic force

Explanation / Answer

4.1 Simple diffusion:-
- It is the process by which solutes are moved along a concentration gradient in a solution or across a semipermeable membrane.
- Simple diffusion is carried out by the actions of hydrogen bonds forming between water molecules and solutes.
- Example:- transport of molecules in and iut of teh cell as water, oxygen, carbon dioxide.

4.2 Facilitated diffusion:-
- It is a form of facilitated transport involving the passive movement of molecules along their concentration gradient, guided by the presence of another molecule usually by carrier proteins.
- Example-transport of ions,sugar ,amino acids.

4.3 Osmosis:-
- It is spontaneous net movement of solvent molecules(water) through a selectively permeable membrane from lower solute to higher solute concentration that tends to equalize the solute concentrations on the two sides.
- flow of water down its concentration gradient.

4.4 Hydrostatic force:-
- Hydrostatic Force= Force due to the pressure of a fluid at rest
- E.g- Force exerted on the wall of storage tanks.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.