Question

solutions are made of solvent and solute.

• what is the solvent? what is normally the solvent in biology?
• what is the solute? what is the most common solute used in biology? (with water written)

osmosis

• what is osmosis? (handwritten: the passive movement of water molecules across a selectively...)
• osmosis moves with the concentration gradient from high concentrations to ___ concentrations.
• this means that osmosis is _ transport (facilitated diffusion) and occurs with the assistance of channel proteins (_).

tonicity

• tonicity is a way to describe the solute concentration of solutions, and is always expressed as a comparison of one solution to another. solutions can be: 1. 2. 3.

hypotonic solutions

• hypotonic:
• low concentration of solute (salt) compared to the cell’s cytoplasm (hypo = low)
• high concentration of water compared to the cell’s cytoplasm
• water moves _ the cell and the cell _ in size.

(diagrams: beaker with salt, concentration gradient, cell in hypotonic environment)

Explanation:

To answer the fill - in - the - blank questions related to osmosis and tonicity:

Osmosis - related questions

1. Osmosis definition: Osmosis is the passive movement of water molecules across a selectively permeable membrane.
2. Osmosis and concentration gradient: Osmosis moves with the concentration gradient from high water concentrations to low water concentrations (or from low solute concentrations to high solute concentrations).
3. Type of transport in osmosis: This means that osmosis is passive transport (facilitated diffusion) and occurs with the assistance of channel proteins (aquaporins).

Tonicity - related questions

Solutions can be:

1. Hypotonic
2. Isotonic
3. Hypertonic

Hypotonic Solutions - related questions

In a hypotonic solution:

• Water moves into the cell and the cell increases in size.

Answer:

s to the blanks:

• For the osmosis direction of concentration gradient: high; low
• For the type of transport in osmosis: passive; aquaporins
• For the types of tonicity - based solutions: Hypotonic; Isotonic; Hypertonic
• For the movement of water and change in cell size in hypotonic solution: into; increases