A saline solution (a type of salt water) can be added to a patient’s bloodstream
during medical procedures. However, if the concentration of salt is too high, blood
cells may become damaged.

A student decides to perform an investigation to test this claim.

Which investigations are most appropriate to help the student test the claim?
Circle the three correct answers.

Monitor how quickly celery stalks of different lengths take in colored water.

Measure the mass of carrot sticks before and after being placed in solutions
of either salt water or fresh water.

Compare the firmness of spinach leaves placed in a salt solution overnight
with those placed in fresh water overnight.

Examine how quickly colored salt water moves into potato cubes that are
5 mm or 10 mm in length.

Use a microscope to examine changes in leaf cells placed in solutions of
1% or 10% salt.

Question

A saline solution (a type of salt water) can be added to a patient’s bloodstream
during medical procedures. However, if the concentration of salt is too high, blood
cells may become damaged.

A student decides to perform an investigation to test this claim.

Which investigations are most appropriate to help the student test the claim?
Circle the three correct answers.

Monitor how quickly celery stalks of different lengths take in colored water.

Measure the mass of carrot sticks before and after being placed in solutions
of either salt water or fresh water.

Compare the firmness of spinach leaves placed in a salt solution overnight
with those placed in fresh water overnight.

Examine how quickly colored salt water moves into potato cubes that are
5 mm or 10 mm in length.

Use a microscope to examine changes in leaf cells placed in solutions of
1% or 10% salt.

jasonmitchell · Answer

@Ultrilliam

jasonmitchell · Answer

@SmokeyBrown

SmokeyBrown · Answer

Well, since the student wants to test the effects of salinity on the cells submerged in solution, I'd say options 2, 3, and 5 would be correct. These three test solutions of different salinity, while the other two experiments test objects of different size to be submerged.

jasonmitchell · Answer

A saline solution (a type of salt water) can be added to a patient’s bloodstream
during medical procedures. However, if the concentration of salt is too high, blood
cells may become damaged.

A student decides to perform an investigation to test this claim.

Part B

Which statements explain the answers to Part A? (The previous question)

Select ALL that apply.

*Hint - fresh water is a hypotonic solution.

Cells placed in fresh water may burst.

Solutions with a high salt concentration will diffuse faster than solutions with a
low salt concentration

Water will move out of cells that are placed in a solution with a high salt
concentration.

Cells placed in salt solutions will become stiff.

Tissues placed in salt water will weigh more than those placed in fresh water.

Cells placed in fresh water will shrink in size.

SmokeyBrown · Answer

I'd say the first three options are true, based on how osmosis works, but the other three are not