Most elements of the endomembrane system are connected by:
A) cytoskeleton
B) vesicular trafficking
C) continuous membranes
Ans: B) vesicular trafficking
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Release of cross-bridges depends most directly on
A. calcium ions. B. potassium ions. C. adenosine diphosphate. D. adenosine triphosphate. E. creatine phosphate.
The pigment responsible for photoperiodism is
a. chlorophyll. b. xanthophyll. c. anthocyanin. d. phytochrome. e. phytoerythrin
You are planning a careful study of the metabolic rate of a spotted bat (Euderma maculatum). At the last minute, you learn that you will not be able to measure caloric intake directly. Should you abandon your study?
A. No, because oxygen intake can be measured instead, and it will provide an indirect measurement of metabolic rate. B. No, because digestive enzyme production can be measured instead, and it will provide an indirect measurement of metabolic rate. C. No, because water intake can provide an indirect measurement of metabolic rate. D. Yes, because caloric measurement would provide the only meaningful data. E. No, because carbon dioxide intake can be measured instead, and it will provide an indirect measurement of metabolic rate.
Filtration occurs in which section of a mammalian nephron?
a. glomerulus in the Bowman's capsule b. loop of Henle c. proximal tubule d. distal tubules e. peritubular capillary