AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these is the best definition of osmosis?
A
The movement of water molecules down the water concentration gradient through a partially permeable membrane
B
The movement of water across a partially permeable membrane
C
The movement of water in and out of cells from a high to low concentration
D
The movement of water molecules up the water concentration gradient through a partially permeable membrane
Explanation: 

Detailed explanation-1: -Osmosis can be defined as the spontaneous movement of solvent molecules through a semi-permeable membrane from a lower-concentration solution to a higher-concentration solution.

Detailed explanation-2: -os·mo·sis äz-ˈmō-səs. äs-: movement of a solvent (such as water) through a semipermeable membrane (as of a living cell) into a solution of higher solute concentration that tends to equalize the concentrations of solute on the two sides of the membrane.

Detailed explanation-3: -Osmosis is the movement of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration. Osmosis helps regulate the flow of water in and out of cells, which is crucial to their function.

Detailed explanation-4: -Osmosis is the diffusion of water through a semipermeable membrane from a high concentration of water to a low concentration of water across the membrane (water is moving down its concentration gradient).

There is 1 question to complete.