Almost all freshwater animals and most marine vertebrates are:
Correct answer: B. Osmoregulators
- A. Osmoconformers
- B. Osmoregulators
- C. Isotonic to environment
- D. At dynamic equilibrium with environment
Explanation
Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content. Freshwater fishes absorb a controlled amount of water through the mouth and the gill membranes. Due to this intake of water, they produce large quantities of urine through which a lot of salt is lost. The salt is replaced with the help of mitochondria-rich cells in the gills.Osmoconformers are marine organisms that maintain an internal environment which is isotonic to their external environment. This means that the osmotic pressure of the organism's cells is equal to the osmotic pressure of their surrounding environment.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
Practise Homeostasis
698 free Homeostasis MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Homeostasis questions
Urine leaves the kidney through a duct called:
When a frog is kept in water for some time it sheds a thin covering of skin called _
Sunken stomata are found in?
Many _ expel a large amount of water by special structures called contractile vacuoles:
The plants having thick cuticle, needle like reduced leaves and sunken stomata are termed as:
In comparison to a constantly changing external environment, _ is when the body maintains the internal processes to work in a narrow range of internal fluctuations.