Tonicity and Its Effects on Human Cells

Dr. Mike explains tonicity, focusing on the concentration of solutions compared to human cells. He describes isotonic solutions, where the concentration is equal inside and outside the cell, resulting in no net movement of solutes or water. Hypertonic solutions have a higher concentration outside the cell, causing water to leave the cell, leading to crenation. Hypotonic solutions have a lower concentration outside, causing water to enter the cell, potentially leading to lysis. The video emphasizes understanding diffusion and osmosis in these contexts.

What is the concentration of sodium chloride in human cells?

• 1.5%

• 2.0%

• 0.9%

• 0.5%

What does 'iso' in isotonic mean?

• More

• Same

• Less

• Different

What happens to water movement in an isotonic solution?

• No net movement of water

• Water moves out of the cell

• Water moves randomly

• Water moves into the cell

What does 'hyper' in hypertonic mean?

• None of the above

• Less than

• Equal to

• More than

What is the effect of a hypertonic solution on cells?

• Cells swell

• Cells shrink

• Cells remain the same

• Cells burst

What is the term used for the shrinking of cells in a hypertonic solution?

• Osmosis

• Diffusion

• Crenation

• Lysis

What does 'hypo' in hypotonic mean?

• Equal to

• More than

• None of the above

• Less than

What happens to cells in a hypotonic solution?

• Cells burst

• Cells become rigid

• Cells shrink

• Cells remain the same

What is the process called when cells burst in a hypotonic solution?

• Crenation

• Lysis

• Osmosis

• Diffusion

Which solution has a lower concentration of solutes compared to the cell?

• Isotonic

• Hypertonic

• Hypotonic

• None of the above