The hormone gastrin __________.
a. increases the activity of parietal and chief cells
b. is produced in response to sympathetic stimulation
c. is secreted by the pancreatic islets
d. inhibits the activity of the muscularis externa of the stomach
Answer: a. increases the activity of parietal and chief cells
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Which features are found only on thoracic vertebrae?
A. Costal facets and demifacets B. Spinous processes C. Transverse foramina D. Vertebral foramina E. Laminae
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Which area of the myogram shows sustained contraction with partial relaxation?
a) A b) B c) C d) D e) none of these choices