Question

Match the terms to these definitions.
Diffusion, osmosis, impermeable, differentially permeable, fluid mosaic model, micellar theory, endocytosis, exocytosis, passive transport, active transport, microvilli, desmosomes, chemoreception
..........The lipids and integrated proteins in a membrane are disposed in a sort of mosaic pattern; lipids are arranged as a thin bilayer while the proteins as icebergs floating in. a sea of the phospholipid bilayer.

Answer 1

1. Diffusion is the movement of both molecules of gas as well as water from higher to lower concentration without the use of energy.
2. Osmosis is the movement of water molecules against the concentration gradient through a semipermeable membrane.
3. Impermeable means that it does not allow any substance to pass through it.
4. Differentially impermeable means a semipermeable membrane that does not allow the movement of solutes but is permeable to solvent an across the membrane.
5. In a fluid mosaic model, all the proteins and lipids are arranged in the form of a mosaic, two lipid layers are present in between which proteins are embedded which allows the movement of a substance between the lipid layers maintaining its fluidity.
   
6. The micellar theory states that protoplasts and some of its contents are primary and are micellar (the unit structure is made up of many ions and molecules ).
7. Endocytosis is the process of engulfing of food by the invagination of the membrane and forming a vacuole.
8. Exocytosis is the process of removal of food by the cell through the membrane.
9. Passive transport is the movement of ions an molecules across the plasma membrane without the use of energy.
10. Active transport is the movement of ions and molecules across the plasma membrane and requires energy.
11. Microvilli are the small finger-like projections that are present on the surface of the membranes to increase the surface area for absorption.
12. Desmosomes are the structures that attach the two adjacent cells together.
13. Chemoreception is a physiological process in which organisms respond to chemical stimulus.

So, the correct answer is 'The fluid mosaic model'.