Question

use the information and image to complete part a and part b. students conduct an experiment to investigate the role of cellular transport in maintaining homeostasis. they set up a beaker and a dialysis bag as shown in the diagram below. the dialysis bag is selectively permeable to the small water molecules, but not permeable to the larger solute particles. the students measured the mass of the bag before placing it into the beaker and again 24 hours later. part a: during osmosis, which of the following correctly justifies the results expected from the experimental design? a. the mass of the bag would increase over a period of 24 hours, indicating that solute molecules are moving from a higher concentration to a lower concentration. b. the mass of the bag would decrease over a period of 24 hours, indicating that water is moving from a higher concentration to a lower concentration. c. the mass of the bag would increase over a period of 24 hours, indicating that solute molecules are moving from a lower concentration to a higher concentration. d. the mass of the bag would decrease over a period of 24 hours, indicating that water is moving from a lower concentration to a higher concentration. part b: use the dropdown menu to identify the tonicity of the solution in the bag and solution in the beaker. the bag contains a(n) solution. the beaker contains a(n) solution.

Explanation:

In osmosis, water moves from an area of lower solute concentration (higher water concentration) to an area of higher solute concentration (lower water concentration). If the mass of the bag increases over 24 hours, it means water is moving into the bag, indicating that the solution in the beaker has a lower solute concentration compared to the bag. For tonicity, if water moves into the bag, the solution in the beaker is hypotonic relative to the solution in the bag.

Answer:

(a) A. The mass of the bag would increase over a period of 24 hours, indicating that water molecules are moving from a lower concentration to a higher concentration.
(b) hypotonic