Sodium concentration in the urine will be maintained due to the loop of the nephron (loop of Henle) exhibiting
Select one:
a. an active release of sodium from the descending limb.
b. a passive and active release of sodium from the ascending limb.
c. a passive release of sodium from the descending limb.
d. the release of water from the ascending limb.
e. the active transport of water.
b. a passive and active release of sodium from the ascending limb.
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A complete cell lineage map exists for
A. C. elegans. B. Drosophila. C. mouse. D. human.
Explain why a pregnant woman should not have an abdominal X-ray and identify the possible consequences to the
fetus if she does. What will be an ideal response?
Tortoiseshell cats have a coat-color gene on their X chromosome. What process in eukaryotes explains why males can have solid orange or black fur, and only females can have the tortoiseshell pattern of fur?
What will be an ideal response?
Which of the following metabolic pathways is found only in prokaryotes?
A. Embden-Meyerhof-Parnas (EMP) B. Entner-Doudoroff (ED) C. Pentose phosphate pathway D. Non-cyclic photophosphorylation E. Calvin-Benson