Osmoregulation in Organisms
Biology ⇒ Biological Systems and Homeostasis
Osmoregulation in Organisms starts at 9 and continues till grade 12.
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Describe how amphibians regulate water and salt balance when living in freshwater.
Describe the role of aldosterone in osmoregulation.
Describe the role of the loop of Henle in osmoregulation in mammals.
Explain how freshwater fish maintain osmotic balance in their bodies.
Explain how the body responds to dehydration in terms of osmoregulation.
Explain why marine birds have salt glands.
Explain why osmoregulation is important for enzyme function in cells.
In a scenario where a person drinks excessive water, what mechanism prevents overhydration?
Which hormone regulates water reabsorption in the kidneys? (1) Insulin (2) Antidiuretic hormone (ADH) (3) Thyroxine (4) Adrenaline
Which of the following animals excretes ammonia as its main nitrogenous waste? (1) Mammals (2) Birds (3) Freshwater fish (4) Reptiles
Which of the following best describes the difference between osmoconformers and osmoregulators? (1) Osmoconformers actively regulate internal osmolarity, osmoregulators do not. (2) Osmoconformers match their internal osmolarity to the environment, osmoregulators maintain a constant internal osmolarity. (3) Both maintain constant internal osmolarity. (4) Both match their internal osmolarity to the environment.
Which of the following best describes the function of the collecting duct in the nephron? (1) Filtration of blood (2) Reabsorption of glucose (3) Regulation of water reabsorption (4) Secretion of hormones
In a hypotonic environment, a cell will ________ water by osmosis.
In marine environments, the osmotic concentration of the surrounding water is ________ than that of the body fluids of most marine invertebrates.
Osmoregulation helps maintain the ________ balance in an organism's body.
The main nitrogenous waste excreted by birds and reptiles is ________.
True or False: Marine bony fish tend to lose water to their environment by osmosis.
True or False: Osmoconformers maintain their internal osmolarity equal to that of their environment.
True or False: Osmoregulation is a form of homeostasis.
True or False: Osmoregulation is not required in isotonic environments.
