Describe what will occur in each of the following situations, include what the c
ID: 97743 • Letter: D
Question
Describe what will occur in each of the following situations, include what the cell will look like, and state which way the water moves (into cell, out of cell, both in and out, or neither):
a. an animal cell if it is placed in a solution that is 10 times more concentrated than an isotonic solution (is this hypotonic, isotonic, or hypertonic?).
b. an animal cell if it is placed in a solution that is 10 times more dilute than an isotonic solution (is this hypotonic, isotonic, or hypertonic?).
c. a plant cell if it is placed in a solution that is 10 times more concentrated than an isotonic solution (is this hypotonic, isotonic, or hypertonic?).
d. a plant cell if it is placed in a solution that is 10 times more dilute than an isotonic solution (is this hypotonic, isotonic, or hypertonic?).
Two test tubes containing unknown solutions have been prepared in the following way. Test tube 1: 15 mL of unknown solution 1 plus 5 drops of sheep’s blood. Test tube 2: 15 mL of unknown solution 2 plus 5 drops of sheep’s blood. Each tube is mixed and held against a newspaper and a researcher attempts to read the page of text through the solution. The researcher obtains the following results:
Appearance of the Solution Can the researcher read the print?
Test tube 1: transparent b/c the cells have burst yes
Test tube 2: opaque b/c the cells are intact no
The solutions (1 and 2) correspond to unknowns used in the Osmosis lab.
Indicate if the solutions were hypotonic, isotonic, or hypertonic.
Tube 1:
Tube 2 (there are two possible answers):
Indicate if water flowed into the cells or out of the cells and why this would result in the appearance of the cells indicated above.
Indicate what would have happened to the red blood cells that would produce the above result, noting the shape of the resulting cells.
Define “hypertonic”:
Define “hypotonic”:
Define “isotonic”:
Unlike animals, plants never absorb enough water that their cells burst, but they frequently lose enough water to wilt.
Describe plant wilting in terms of turgor pressure.
Indicate what extracellular structure in plant cells prevents it from bursting. What polymer is this structure made from? What is the monomeric unit of this polymer?
Indicate what intracellular organelle is involved in maintaining turgor pressure in plant cells.
What is the optimum environment for growing plants (hypertonic, hypotonic, or isotonic)?
Explanation / Answer
A) HYPERTONIC
b) HYPOTONIC
C) HYPERTONIC
D) HYPOTONIC
In test tube 1 Sheep Blood RBC are placed in hypertonic solution (unknown solution 1). so, they have lost water and because of that cells have burst.
In test tube two Sheep blood RBC are placed in may be isotonic or hypotonic (Unknown solution 2).in case of an isotonic solution no transport of water takes place and in hypotonic solution water flows into the RBC. so, they are not damaged. and the solution is opaque.
hypertonic solution?
A solution with higher concentration of water molecules (solvent) inside a cell than outside a cell
Hypotonic Solution
a solution in with higher concentration of water molecules (solvent) outside a cell than inside a cell
Isotonic Solution
A solution in which the concentration of both the solvent and solute are equal on both sides of the cell membrane.
Plants prefer hypotonic environments because the plant cells will get water from the environment and stores in the vacuoles. The vacuoles will apply turgor pressure to the cell walls which help plant cells maintain their structure. If a plant cell is placed in a hypertonic environment, its plasma membrane will shrink away from the cell wall in a process called plasmolysis.