Which of the following does NOT act to maintain the
osmotic gradient necessary for the concentration of
urine in mammals?
a. countercurrent flow at the loop of Henle
b. decreased hypothalamic signals leading to a
decrease in ADH production
c. impermeability of the descending limb of the
loop of Henle to Na+, Cl-, and other solutes
d. impermeability of the ascending limb of the loop
of Henle to water
e. all of these
Answer: b
You might also like to view...
Body mass index (BMI) is an indirect measurement of ____
a. caloric intake b. energy utilization c. basal metabolic weight d. age e. body fat
Which of the following is NOT a function of proteins?
A. Energy carrier B. Structure of bones C. Enzymes D. Hormones E. All of these are functions of proteins
If a relationship is harmful to both the animals in that relationship, the relationship is one of
A. competition. B. parasitism. C. symbiosis. D. mutualism.
A plant that produces yellow seeds is bred with a plant that produces green seeds. All of the seeds of the offspring are yellow. Which of the following explains this result?
A) The yellow allele is recessive to the green allele. B) All of the offspring are homozygous for the yellow allele. C) The yellow allele is dominant to the green allele. D) Yellow is an easier color to produce.