Vertigo is the sensation of dizziness. Which structure is most likely involved in this sensation?
a. basilar membrane
b. pinna
c. semicircular canals
d. stapes
e. oval window
ANSWER: c
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DNA in prokaryotes is found in ____
a. the nucleoid only b. the nucleolus only c. plasmids only d. the nucleoid and plasmids e. the nucleolus and plasmids
Which component of the muscle stretch reflex initiates the reflex?
a. motor neuron b. interneuron c. muscle spindle d. acetylcholine e. Schwann cell
The tendency of an electrolyte to diffuse between two compartments depends on _______.
a) an electrical gradient b) ATP concentration in the cell c) an electrochemical gradient d) a chemical gradient
A defining characteristic of eukaryotic organisms is that they
A. have their transcription occurring in the cytoplasm and translation in the nucleus. B. carry out protein synthesis only in the presence of the cAMP molecule. C. use the leucine zipper primarily for the production of the amino acid tryptophan. D. have only operons to assist in gene expression. E. have their transcription occurring in the nucleus and translation in the cytoplasm.