Osmoregulation in Organisms
Biology ⇒ Biological Systems and Homeostasis
Osmoregulation in Organisms starts at 9 and continues till grade 12.
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See sample questions for grade 9
A marine fish is placed in freshwater. Predict what will happen to its cells and explain why.
Describe how amphibians osmoregulate when moving from water to land.
Describe how the structure of the nephron helps in osmoregulation.
Describe the role of the contractile vacuole in osmoregulation in unicellular organisms like Paramecium.
Explain how freshwater fish osmoregulate differently from marine fish.
Explain the difference between osmoregulators and osmoconformers, giving one example of each.
A marine fish is placed in freshwater. Predict what will happen to its cells and explain why.
A person drinks a large amount of water. What effect does this have on the secretion of ADH? (1) Increases ADH secretion (2) Decreases ADH secretion (3) No effect (4) ADH is not involved
A person drinks a large amount of water. What effect does this have on the secretion of ADH? (1) Increases ADH secretion (2) Decreases ADH secretion (3) No effect (4) ADH is not involved
What would happen to a red blood cell placed in a hypotonic solution? (1) It would shrink (2) It would swell and burst (3) It would remain the same size (4) It would change color
Which hormone regulates water reabsorption in the kidneys? (1) Insulin (2) Antidiuretic hormone (ADH) (3) Adrenaline (4) Thyroxine
Which of the following animals is an osmoconformer? (1) Human (2) Goldfish (3) Jellyfish (4) Frog
Fill in the blank: In humans, the functional unit of the kidney responsible for filtration and osmoregulation is the __________.
Fill in the blank: Insects reduce water loss by having a __________ exoskeleton.
Fill in the blank: The hormone __________ increases the permeability of the kidney tubules to water, promoting water reabsorption.
Fill in the blank: The main organ for osmoregulation in insects is the __________ tubule.
True or False: Marine birds excrete excess salt through specialized glands near their eyes.
True or False: Osmoconformers actively regulate their internal osmotic conditions.
True or False: Osmoregulation helps organisms survive in different environments by controlling water and salt levels.
True or False: Osmoregulation is necessary for both unicellular and multicellular organisms.
