Which statement best describes the goal of medications used to treat myasthenia gravis?
A. To decrease the number of synaptic vesicles
B. To increase the number of acetylcholine receptors
C. To inhibit Ca2+ release from the sarcoplasmic reticulum
D. To promote multiple motor unit summation
E. To inhibit the function of cholinesterase
Answer: E
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The most important phagostimulants of insects are
A) Sugars. B) Amino acids. C) Fatty acids. D) Both A and B
During auscultation of the lungs:
A) it is normal to hear the sliding of the parietal and visceral layers of pleura. B) it is normal to hear the movement of the pleural fluid. C) pleural rub sounds indicate pleuritis or pleurisy. D) pleural rub sounds indicate a loss of negative pressure in the pleural cavity. E) pleural rub sounds indicate pneumonia.
B lymphocytes differentiate into:
cytotoxic and suppressor cells helper and suppressor cells memory and plasma cells memory and helper cells None of the choices are correct
Which structure contains enzymes needed by a sperm cell to penetrate an oocyte?
A. Sustentacular cells B. Androgen-binding protein C. Gubernaculum D. Acrosome