Which of the following describes the auditory tube?
A. It leads from the pinna to the tympanic membrane.
B. It leads from the tympanic membrane to the oval window.
C. It spirals around the modiolus of the cochlea.
D. It leads from the nasopharynx to the middle ear.
E. It includes the vestibule and semicircular ducts.
D. It leads from the nasopharynx to the middle ear.
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Which layer of the epidermis is characterized by prominent cytoplasmic granules in the cells?
A) stratum corneum B) stratum lucidum C) stratum spinosum D) stratum granulosum
Which of the following is not under dual control of the ANS?
A. Gastrointestinal motility B. Salivary gland activity C. Adrenal medulla activity D. Pupil diameter E. Heart rate
The backbone or sides of a DNA helix consists of
A. an adenine-ribose chain. B. nitrogen base pairs. C. a sugar-phosphate chain. D. a glucose-phosphate chain.
Gallstones are usually composed of
A. uric acid. B. cholesterol. C. calcium salts. D. bile pigments.