Sharks live in seawater.Their tissues are isotonic to seawater,but their concentrations of sodium ions,potassium ions,and chloride ions in cells and extracellular fluids are similar to those of freshwater fishes.How is that possible?
A) There are other compounds contributing to intra- and extracellular osmolarity in shark tissues.
B) Metabolic intermediates of sharks tie up intracellular chloride and potassium ions.
C) Their blood is hypotonic to their tissues.
D) They excrete large quantities of electrolytes.
Correct Answer:
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Q1: Which of the following affects the osmolarity
Q2: Which of the following most accurately describes
Q2: Tissues of sharks are isotonic to seawater,but
Q4: Which of the following are soluble compounds
Q6: Marine vertebrates live in a(n)_ environment.
A)isotonic
B)hypotonic
C)hypertonic
D)osmotonic
Q6: What is the function of the shark
Q9: Freshwater fish live in a hypotonic environment.To
Q10: The force driving simple diffusion is
A)ATP.
B)a concentration
Q14: Which of the following is an example
Q17: What role do chloride cells play in
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