Which of the following glands is both an endocrine gland and an exocrine gland?
A. thyroid gland
B. adrenal gland
C. pancreas
D. parathyroid gland
E. pituitary gland
C
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Blood capillaries that supply nourishment for the epidermis are located in the
A. subcutaneous layer. B. epidermis proper. C. reticular connective tissue. D. dermal papillae. E. epidermal ridges.
Glucagon is produced by pancreatic alpha cells.
Answer the following statement true (T) or false (F)
Which of the following statements regarding contraction of a skeletal muscle fiber is TRUE?
A. Some contractions occur without cross-bridge activation. B. Contracting muscle fibers do not always shorten. C. Contraction only occurs following summation of action potentials from many motor neurons. D. Contraction does not always require the occurrence of an action potential. E. Thick filaments shorten when muscle cells contract.
Which membrane separates the cochlear duct from the scala tympani, and provides a surface on which the spiral organ rests?
A. Vestibular membrane B. Cochlear membrane C. Tectorial membrane D. Basilar membrane E. Tympanic membrane