The figure shows the bones of the right orbit. What bone does "D" represent?
A. frontal
B. maxilla
C. zygomatic
D. lacrimal
E. ethmoid
D
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Some antacid drugs block histamine receptors, resulting in reduction of the production and excretion of stomach acid. These drugs have the biggest effect on which of the following?
A) surface epithelial cells B) chief cells C) mucous neck cells D) parietal cells
The heart is supplied with blood by:
a. diffusion through the heart wall b. the right and left cardiac arteries c. arteries that branch directly from the pulmonary artery d. arteries that branch directly from the aorta
Which of the following describes a female's pelvis compared to a male's pelvis?
A) A cavity that is wider in all dimensions, with lighter bones. B) A cavity that is narrower in all dimensions, with lighter bones. C) A cavity that is narrower in all dimensions, with heavier bones. D) A cavity that is wider in all dimensions, with heavier bones.
Acetylcholine binds to ________ receptors of the heart and causes the opening of ________ channels.
A. muscarinic; Na+ B. muscarinic; K+ C. nicotinic; K+ D. nicotinic; Na+