Homework Answers
Answer :
Freshwater fish lives in an environment where there is less salt concentration than the extracellular fluid of fishes. This means, the environment is hypotonic with respect to the extracellular fluid. These fishes are at risk of excess water entry into body and loss of ions.
These fishes maintain optimal internal solute and salt concentration by regulating the uptake and loss of water and ions. They actively take up lost ions via gills and release large amounts of very dilute urine.
On the other hand, saltwater fishes live in a environment where salt concentration is higher than the extracellular fluid. This means the environment is hypertonic with respect to the extracellular fluid of the fish. These are at risk of loss of water and excessive build up of salt in the body.
These fishes also regulate uptake and loss of salt and water. They actively secrete the excessive salt that builds up in the body, and they release a very concentrated urine to conserve water.
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representing the ratio of saturated to unsaturated fatty acids
present in the cell membrane and the other representing the amount
of cholesterol present in the cell membrane. Each graph should
include a bar for each of the following groups of organisms. The
objective is to correctly represent what we would expect to see in
the cell membranes of organisms adapted to different temperatures.
(15 Points) A. Rattlesnakes that have lived for several generations
in Canada...
Of Solute particles. If a cell is in a hypotonic solution, the extracellular fluid has a osmolarity then the inside of the cell. This means it has a solute concentration outside of the cell. Water will move the cell. If a cell is in a hypertonic solution, the extracellular fluid has a osmolarity then the inside of the cell. This means it has a solute concentration outside of the cell. Water will move the cell. If the osmolarity of the...
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