An essential amino acid
A. can be formed from lipids in the body.
B. must be supplied in the diet.
C. can be synthesized by the body if there is enough nitrogen.
D. must be made from glucose.
E. cannot be converted to nonessential amino acids.
Answer: B
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A) primary active transport. B) exocytosis. C) endocytosis. D) facilitated diffusion.
Which plane runs crosswise through the body at right angles to the coronal plane, dividing the body into superior and inferior parts?
A. Median B. Midaxillary C. Oblique D. Axial E. None of the above
In a common reflex arc, after a sensory nerve signal is processed by interneurons in the integration center, where does the signal go next?
A. Motor neuron B. Effector C. Sensory receptor D. Sensory neuron
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A) excessive contraction of platysma. B) goiter. C) spasmodic torticollis. D) lesion of the left facial nerve. E) overactivity in muscles innervated by the right ansa cervicalis.