Which statement about osmosis is not true? a. It obeys the...

Which statement about osmosis is not true? $a$. It obeys the laws of diffusion. $b .$ In animal tissues, water moves into the cell which is hypertonic to the medium. $c .$ Red blood cells must be kept in a plasma that is hypoosmotic to the cells. d. Two cells with identical osmotic potentials are isosmotic to each other $e .$ Solute concentration is the principal factor in osmosis.

Which statement about osmosis is not true?
$a$. It obeys the laws of diffusion.
$b .$ In animal tissues, water moves into the cell which is hypertonic to the medium.
$c .$ Red blood cells must be kept in a plasma that is hypoosmotic to the cells.
d. Two cells with identical osmotic potentials are isosmotic to each other
$e .$ Solute concentration is the principal factor in osmosis.

Key Concepts

Osmosis

Osmosis is the passive movement of water across a semipermeable membrane from a region of lower solute concentration to one of higher solute concentration. This process is influenced by the solute concentration differences between the two environments and does not require energy input.

Diffusion

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration due to random molecular motion. In the context of osmosis, water moves by diffusion driven by concentration gradients across membranes.

Tonicity

Tonicity refers to the effect of a solution on cell volume, which is determined by the relative concentrations of solutes that cannot cross the cell membrane. It categorizes environments as hypertonic, hypotonic, or isotonic with respect to cells, thereby influencing water movement.

Osmotic Potential

Osmotic potential is the component of water potential that is due to solute concentration. It quantifies the tendency of water to move into or out of a solution through osmosis, affecting cell hydration or dehydration.

Solute Concentration

Solute concentration is the primary driving factor for osmosis as it creates the concentration gradient necessary for water movement. The relative concentration of solutes inside and outside a cell determines the direction and magnitude of osmosis.

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