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 process by which a cell actively takes materials inside it.

Answer 1

1. Diffusion is the movement of molecules of both gas and water across the membrane from higher to lower concentration without the use of energy.
2. Osmosis is the movement of water molecules against the concentration through a semipermeable membrane.
3. impermeable means the passage of ions and substances are not allowed.
4. Differentially impermeable is the semipermeable membrane which does not allow the transport of solutes but completely allows the movement of solvents.
5. The micellar theory states that the protoplasts and its contents are primarily and micellar ( the unit structure is made up of many ions and molecules ).
6. Endocytosis is a cellular process that helps in engulfing of minerals and molecules by invagination of the plasma membrane. The membrane surrounds the food particles and then bud off forming vesicles or vacuole.
   
7. Exocytosis is the process in which food is removed by the cell through the membrane.
8. Passive transport is the process of movement of ions and molecules across the membrane without the use of energy.
9. Active transport is the movement of ions and molecules across the membrane and requires energy.
10. Microvilli are small finger-like projections present on the surface of the membranes which increase the surface area for absorption'
11. Desmosomes are the structures that attach two adjacent cells together.
12. Chemoreception is a physiological process in which organisms respond to chemical stimulus.

So, the correct answer is 'Endocytosis'.