Electrons can enter the electron transport system via many paths. The first point of commonality in the ETS for all these paths is
A) Complex I.
B) Complex II.
C) Cytochrome c.
D) Ubiquinone.
Answer: D
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On the pH scale
A. pH values above 7 are basic (alkaline). B. the lower the whole number on the scale, the greater the H+ concentration. C. a tenfold difference in hydrogen ion concentration separates each whole number. D. All of the answer choices are correct.
The loose-fitting sac around the heart is the
A. fibrous pericardium. B. visceral pericardium. C. endocardium. D. epicardium.
Bile secretion is
A. performed continuously by the liver. B. controlled by the gallbladder. C. is stimulated by sympathetic nerves. D. is stimulated by decreased amounts of bile salts. E. stimulated by increased vitamin B12 storage.
A single lobe of a kidney is comprised of ________
A) one major calyx and all of its minor calyces B) a renal medulla and two renal columns C) one collecting duct and all nephrons that drain into it D) two calyces and a renal pelvis E) one pyramid and the overlying cortex