Osmoregulation in Organisms
Biology ⇒ Biological Systems and Homeostasis
Osmoregulation in Organisms starts at 9 and continues till grade 12.
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A marine fish is placed in freshwater. Predict and explain what will happen to its cells.
Describe how the countercurrent multiplier system in the loop of Henle aids in osmoregulation.
Describe how the structure of the nephron contributes to its function in osmoregulation.
Describe the difference between osmoconformers and osmoregulators.
Describe the process by which marine birds excrete excess salt from their bodies.
Describe the role of the hypothalamus in osmoregulation.
Explain how freshwater fish maintain osmotic balance in their bodies.
A marine fish is placed in freshwater. Predict and explain what will happen to its cells.
Which of the following best describes the function of antidiuretic hormone (ADH)? (1) Increases urine output (2) Decreases water reabsorption (3) Increases water reabsorption (4) Stimulates thirst
Which of the following best describes the function of contractile vacuoles in protozoa? (1) Digestion (2) Osmoregulation (3) Movement (4) Respiration
Which of the following best describes the role of the collecting duct in the nephron? (1) Filtration (2) Reabsorption of glucose (3) Water reabsorption under hormonal control (4) Secretion of urea
Which of the following is a consequence of dehydration on osmoregulation? (1) Increased urine output (2) Decreased ADH secretion (3) Increased water reabsorption (4) Decreased thirst
Fill in the blank: Insects use ________ tubules for excretion and osmoregulation.
Fill in the blank: The ________ is the functional unit of the kidney.
Fill in the blank: The hormone that stimulates the reabsorption of sodium in the distal tubule is ________.
Fill in the blank: The movement of water from an area of ________ water potential to an area of ________ water potential is called osmosis.
Desert animals often produce highly concentrated urine. Is this an adaptation for water conservation?
True or False: Marine bony fish tend to lose water to their environment by osmosis.
True or False: Osmoregulation can affect blood pressure in mammals.
True or False: Osmoregulation is only important for aquatic organisms.
