Which of the following veins results from the merger of the superficial temporal vein and the maxillary vein?
A. Facial vein
B. Retromandibular vein
C. Internal jugular vein
D. External jugular vein
E. Brachiocephalic vein
Answer: B. Retromandibular vein
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Which of the following is NOT an effect of gastrin?
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A) vascular resistance. B) opening valves. C) closing valves. D) viscosity. E) turbulence.
The layers of bone tissue immediately deep to the periosteum are:
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