Question

question 8
what is the passive movement of water along a concentration gradient?
facilitated diffusion
plasmolysis
osmosis
simple diffusion

question 9
if the concentration of solutes in a cell is less than the concentration of solutes in the surrounding fluid, then the extracellular fluid is said to be___?
hypotonic
hypertonic
isotonic
amphipathic

question 10
when the net movement of water in and out a cell is zero, that solution is said to be___?
osmotic
hypertonic
isotonic
hypotonic

Explanation:

• For Question 8: Osmosis is the passive movement of water across a semi - permeable membrane along a concentration gradient. Facilitated diffusion is for molecules with the help of transport proteins, plasmolysis is the shrinking of a cell due to water loss, and simple diffusion is for non - polar and small molecules other than water in most cases.
• For Question 9: When the solute concentration in the extracellular fluid is higher than in the cell, the extracellular fluid is hypertonic. Hypotonic means the extracellular fluid has lower solute concentration, isotonic means equal solute concentration, and amphipathic refers to molecules with both hydrophilic and hydrophobic parts.
• For Question 10: In an isotonic solution, there is no net movement of water into or out of the cell. Osmotic refers to the process related to osmosis, hypertonic would cause water to move out of the cell, and hypotonic would cause water to move into the cell.

Answer:

• Question 8: C. Osmosis
• Question 9: B. Hypertonic
• Question 10: C. Isotonic