The nail plate is produced by
A. melanocytes.
B. specialized epithelial cells.
C. bone cells.
D. fibroblasts.
Answer: B
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In somatosensory pathways where do first-order neurons synapse with second-order neurons usually?
a. dorsal root ganglia. b. medulla oblongata. c. spinal cord. d. both (a) and (b) above. e. both (b) and (c) above.
Active sites become exposed when calcium ions bind to
A) tropomyosin. B) actin. C) myosin. D) troponin. E) calcium channels.
Compounds classified as __ after synaptic transmission by changing neurotransmitter receptor numbers or affecting the breakdown and/or release of neurotransmitter.
Fill in the blank(s) with the appropriate word(s).
Joshua has been complaining about pyrosis after his meals. Which of the following is probably the primary cause of this condition?
A. Peristalsis is too slow. B. The cardiac sphincter contracts too often. C. The bolus of food in the esophagus is too big. D. The lower esophageal sphincter remains open for too long.