Pyridostigmine is useful in treating patients with myasthenia gravis because:
A. it increases the secretion of acetylcholine from cholinergic nerve endings.
B. it causes the reversible inhibition of acetylcholinesterase, thereby increasing the levels of acetylcholine at the skeletal neuromuscular junction.
C. it causes the irreversible inhibition of acetylcholinesterase, thereby increasing the levels of acetylcholine at the parasympathetic postganglionic nerve endings.
D. it binds to nicotinic-muscle receptors and produces the same effects as those of acetylcholine.
Answer: B
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Ralph is an experimental psychologist. He studies rat behavior. He runs rats through a maze, under different scent conditions. At the end of the maze is cheese. Sometimes the maze is lit, and sometimes it is dark
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Select the statement that best describes the thelarche stage of puberty in females
1. Appearance of pubic hair 2. Appearance of breast tissue maturation 3. Onset of first menstrual period 4. All the above
In assessing a client with a prostate disorder, the nurse expects the client to report:
a. Painful urination. b. Blood in the urine. c. Waking from sleep to urinate. d. Incontinence.