Osmosis and Cell Volume Effects

The video tutorial explores the concepts of osmotic and tonic solutions, focusing on NaCl and urea. It explains iso-osmotic, isotonic, hyperosmotic, and hypertonic solutions, and their effects on cell volume. The tutorial also covers calculations for maintaining molarity in solutions and the impact of water intake on body osmolarity.

What happens to a cell's volume when placed in a 0.15 molar NaCl solution?

• The cell bursts.

• The cell shrinks.

• The cell remains the same size.

• The cell swells.

Why is a 0.15 molar NaCl solution considered isotonic to animal cells?

• Because it has a higher concentration of solutes.

• Because it has a lower concentration of solutes.

• Because it allows solutes to penetrate the cell membrane.

• Because it has the same concentration of solutes.

What is the osmotic nature of a 0.3 molar NaCl solution compared to the inside of a cell?

• Iso-osmotic

• Hypo-osmotic

• Hyperosmotic

• Non-osmotic

What effect does a hypertonic solution have on a cell?

• The cell swells.

• The cell bursts.

• The cell remains the same size.

• The cell shrinks.

How does a 0.15 molar urea solution affect cell volume?

• The cell remains the same size.

• The cell bursts.

• The cell shrinks.

• The cell swells.

Why is a 0.15 molar urea solution considered hypo-osmotic?

• Because it has a higher concentration of solutes.

• Because it allows solutes to penetrate the cell membrane.

• Because it has a lower concentration of solutes.

• Because it has the same concentration of solutes.

What is the osmotic nature of a 0.6 molar urea solution compared to the inside of a cell?

• Hyperosmotic

• Hypo-osmotic

• Non-osmotic

• Iso-osmotic

What happens to a cell in a hyperosmotic but hypotonic solution?

• The cell shrinks.

• The cell swells.

• The cell remains the same size.

• The cell bursts.

How much water should be added to side A to maintain equalized molarities in a NaCl solution?

• 1 liter

• 0.67 liters

• 0.33 liters

• 0.5 liters

What is the new osmolarity after drinking 2 liters of water?

• 250 mOsm/L

• 300 mOsm/L

• 320 mOsm/L

• 286 mOsm/L