Answer the following statement(s) true (T) or false (F)
1. Both the thymus and the pineal gland shrink after childhood.
2. Myxedema is characterized by low metabolic rate, sluggishness, and sleepiness.
3. Addison disease is a consequence of a tumor of the adrenal medulla.
1. True
2. True
3. False
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What may result if the pharyngoesophageal sphincter does not function properly?
A. Food will be swallowed much faster. B. Food will bypass the esophagus. C. Food cannot enter the esophagus. D. Food will cause the esophagus to collapse.
Ephedrine's potential dangers include:
a. Low blood pressure b. Low heart rate c. Cardiac arrhythmias d. A and B e. B and C f. All of the above
Keratinocytes are
A. sometimes alive and sometimes dead, depending on where they are found. B. the most abundant cell type in the epidermis. C. able to synthesize the protein keratin. D. found throughout all epidermal strata. E. All of the choices are correct.
Which of the following statements concerning the structure of spinal nerves is true?
A. The ventral root has a prominent root ganglion. B. Each spinal nerve is formed by the union of a cranial nerve and a spinal nerve. C. The ventral root contains motor or efferent fibers. D. Spinal nerves do not have specific cutaneous distributions. E. Rootlets from the surface of the spinal cord form the dorsal and ventral rami.