1. Salmon are anadromous fish and must deal with osmotic changes in their environment in extreme ways. Researchers have found that Na*/K* - ATPase is found in two different kinds of cells in the gill tissue. One type is found in the filament bases that appear to be active when salmon are adults only. The other types of cells are found in the lamellae folds and appear to be active during its juvenile stages. Speculate on these findings as to how this allows salmon to complete their unique life cycle.

Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
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1. Salmon are anadromous fish and must deal with osmotic changes in their environment in extreme ways. Researchers have found that Na*/K* -
ATPase is found in two different kinds of cells in the gill tissue. One type is found in the filament bases that appear to be active when salmon are
adults only. The other types of cells are found in the lamellae folds and appear to be active during its juvenile stages. Speculate on these findings as
to how this allows salmon to complete their unique life cycle.
2. Furosemide is a diuretic, causing increased urine production. Its mechanism inhibits a Na-K-2Cl symporter in the thick portion of the ascending loop
of Henle. Explain how this drug causes increased urine production?
3. Mammals, with some exceptions, are the only vertebrates with medullary nephron. All other vertebrates only have a cortical nephron. What does
this mean for the osmolarity of the renal filtrate for these vertebrates and what problems might this present? How do think they solve this problem?
Transcribed Image Text:1. Salmon are anadromous fish and must deal with osmotic changes in their environment in extreme ways. Researchers have found that Na*/K* - ATPase is found in two different kinds of cells in the gill tissue. One type is found in the filament bases that appear to be active when salmon are adults only. The other types of cells are found in the lamellae folds and appear to be active during its juvenile stages. Speculate on these findings as to how this allows salmon to complete their unique life cycle. 2. Furosemide is a diuretic, causing increased urine production. Its mechanism inhibits a Na-K-2Cl symporter in the thick portion of the ascending loop of Henle. Explain how this drug causes increased urine production? 3. Mammals, with some exceptions, are the only vertebrates with medullary nephron. All other vertebrates only have a cortical nephron. What does this mean for the osmolarity of the renal filtrate for these vertebrates and what problems might this present? How do think they solve this problem?
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