SB7h Osmoregulation

Question 1

What is Osmoregulation?

Answer 1

Osmoregulation is the control of the balance of water and mineral salts in the body.

Question 2

What happens when red blood cells are places in a Hypotonic solution? Why?

Answer 2

they lyse because the concentration of mineral salts in the water outside the red bloods cells is much greater than inside therefore a high concentration gradient is formed causing water to flow into the red blood cells causing them to lyse

Question 3

What happens when red blood cells are places in a Isotonic Solution? why?

Answer 3

nothing happens because in a isotonic solution the concentration of mineral salts in the water is the same inside the blood and out therefore their is a low concentration gradient making water move in and out at a safe rate

Question 4

What happens when red blood cells are places in a Hypertonic solution? why?

Answer 4

they shrivel because the concentration of mineral salts in the water outside the red bloods cells is much higher than inside therefore a high concentration gradient is formed causing water to flow out of the red blood cells causing it to shrivel

Question 5

How is water gained and lost?

Answer 5

 Water is produced by the body during respiration, and absorbed from food and drink.

 Water is lost from the body in exhaled air, sweat, urine and feces.

Question 5

What can dehydration cause?

Answer 5

Mild dehydration can cause dizziness, a dry mouth and concentrated urine. Severe dehydration can cause death.

Question 6

What does urine contain?

Answer 6

 Water
 Mineral
 Urea
 Ammonia

Question 7

What substance forms urea?

Answer 7

Excess amino acids in the body

are broken down by the liver, producing
a waste substance called urea.