Which hormones of the HPA axis stimulate the synthesis of epinephrine by chromaffin cells?
A) thyrotropin-releasing hormone (TRH) B) growth hormone-releasing hormone (GHRH)
C) adrenocorticotropic hormone (ACTH) D) gonadotropin-releasing hormone (GnRH)
Answer: C
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Which of the following is a solid structure?
A) medullary cavity B) lacuna C) central canal D) canaliculus E) trabecula
Which of the following is NOT a phase of a muscle twitch?
A) latent period B) relaxation phase C) contraction phase D) shortening phase
Which of the following is the correct order for the phases of deglutition?
A. Pharyngeal, voluntary, esophageal B. Voluntary, pharyngeal, esophageal C. Esophageal, pharyngeal, voluntary D. Voluntary, esophageal, pharyngeal
If the left corticospinal tract is severed in the neck near the first cervical vertebra,
A. pain impulses from the right side are blocked. B. muscles in the right arm and leg are paralyzed. C. muscles in the left arm and leg are paralyzed. D. pain impulses from the left side are blocked.