A nephron is a two-way system with glomerular filtrate traveling back and forth within the nephron.
Answer the following statement true (T) or false (F)
False
The nephron is a one-way system. Filtrate moves from the glomerular capsule through the proximal convoluted tubule to the loop of Henle to the collecting duct.
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Osmoregulation is best defined as:
A. the control of osmotic pressure through regulation of water and solute levels. B. the movement of water from areas of lower solute concentration to areas of higher solute concentration. C. the difference in solute concentration on the two sides of a membrane. D. the movement of water through aquaporins. E. the regulation of membrane permeability.
Octopuses and squid have a closed circulatory system with _______ heart(s).
a. one b. two c. three d. eight
Which of the following molecules of RNA would you predict to be the most likely to fold into a specific structure as a result of intramolecular base-pairing?
(a) 5?-CCCUAAAAAAAAAAAAAAAAUUUUUUUUUUUUUUUUAGGG-3? (b) 5?-UGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUGUG-3? (c) 5?-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-3? (d) 5?-GGAAAAGGAGAUGGGCAAGGGGAAAAGGAGAUGGGCAAGG-3?
In which of the stages below are the chromosomes present as attached sister chromatids? I. metaphase II. telophase III. prophase IV. anaphase
a. III and IV b. I, III, and IV c. I and III d. I, II, and III e. I, II, III, and IV