Biology Lecture on Osmosis and Membrane Transport

These flashcards cover the key topics related to osmosis and membrane transport as discussed in the lecture.

Osmosis is defined as __.

The diffusion of water molecules across a selective (semi-permeable) barrier.

The concentration of water is determined by __.

The concentration of solutes in the water.

In a hypotonic solution, water will __ into the cell.

Diffuse.

A selective barrier allows __ to pass through but not most dissolved molecules.

Water molecules.

If the solute potential (s) is higher inside a cell than outside, the solution is __.

Hypertonic.

The diffusion of water occurs from areas of to areas of .

Higher solute potential (s); lower solute potential (s).

A cell in an isotonic solution will experience __ amounts of water entering and leaving it.

Equal.

The Blood-Brain-Barrier prevents __ from entering the brain.

Most medicines.

Mannitol works by __ the solute potential of blood.

Lowering.

What type of membrane transport does not require cellular energy or transport proteins? __

Passive transport.

Transport proteins are required for __ transport.

Facilitated.

The osmotic movement of water is driven by differences in __.

Solute concentration (s).