After 20 years on the road, Roger recently retired as the drummer of a rock band. It didn't take long for Roger to realize that he was unable to hear as well as he used to. Roger's diminished hearing is most likely due to damage of
A) the tympanic membrane.
B) the hammer and anvil.
C) hair cells.
D) corpuscles.
E) the auditory nerve.
C
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What would be the outcome if the pump protein shown in Fig. 5.13a instead acted as a carrier that allowed protons to move from the extracellular fluid into the cytoplasm?
A. The proton electrochemical gradient would be reversed. B. ATP could be synthesized from ADP + Pi. C. The number of protons on either side of the membrane would equalize. D. Two answer options are true: ATP could be synthesized from ADP + Pi AND the number of protons on either side of the membrane would equalize.
Autotrophs typically obtain their carbon from:
A. C6H12O6. B. ATP. C. CO2. D. CH4. E. CH3OH
Chromosomes are in a condensed form at which stage(s) of the cell cycle?
a. prophase only b. prophase and metaphase c. interphase d. all stages of interphase and mitosis e. throughout mitosis until late telophase
As sperm first reach the oocyte, they will contact the ________:
a. acrosome b. corona radiata c. sperm-binding receptors d. zona pellucida