Water and Air

Question 1

Why is water important?

Answer 1

• Maintains cell hydration
• Assists in the removal of toxins, sweat, tears, urine and faeces
• Major component of bodily fluids e.g. cerebrospinal fluid, synovial fluid, cytoplasm, and blood plasma

Question 2

What is osmosis?

Answer 2

The passive movement of water through a semi-permeable membrane to a higher concentration of solutes

Question 3

Why is osmosis important?

Answer 3

Important for cellular function as it allows water and other dissolved fluids to move across a semi-permeable membrane. It is also important as water needs to move in and out of our body cells to maintain equilibrium of solutes and fluids.

Question 4

Osmosis when dehydrated

Answer 4

Water moves into waste cells that have entered kidney tubules for elimination