How does the concept of tonicity apply to the preservation of food using salt or sugar?

2.8 Tonicity and Osmoregulation - Review

Describe what happens to a red blood cell when it is placed in a hypertonic solution.

Explain the effect of a hypotonic solution on a plant cell and how it differs from its effect on an animal cell.

What is an isotonic solution, and why is it important for intravenous (IV) fluids to be isotonic?

Why is it crucial for cells to maintain osmotic balance, and what mechanisms do they use to achieve this?

Describe how osmoregulation in freshwater fish differs from that in marine fish.

Explain how plants in arid environments adapt to minimize water loss.

How do amphibians maintain water balance in both aquatic and terrestrial environments?

Describe the role of contractile vacuoles in maintaining water balance in unicellular organisms like paramecia.

10.

How do desert animals like kangaroo rats conserve water?

11.

Describe how a plant cell responds to a hypotonic environment and explain the role of the cell wall in this process.

12.

Explain how animal cells maintain osmotic balance in a hypertonic environment.

13.

How do freshwater protists like Paramecium adapt to living in a hypotonic environment?

14.

Discuss the role of aquaporins in cellular adaptation to osmotic stress.

15.

How do halophilic (salt-loving) bacteria maintain homeostasis in high-salinity environments?

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AI InstructorJUL 28, 2024, 8:17:58 AM

Preservation of food using salt or sugar creates a hypertonic environment around the food. This high solute concentration causes water to move out of microbial cells by osmosis, leading to dehydration and inhibition of microbial growth, thereby preserving the food.

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What is the primary reason salt or sugar preserves food?

Select one of the following options:

A.
It provides essential nutrients to the food.
B.
It lowers the temperature of the food.
C.
It creates a hypertonic environment that dehydrates microbial cells.
D.
It increases the acidity of the food.

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