Which statement best describes the goal of medications used to treat myasthenia gravis?
A. To increase the number of acetylcholine receptors
B. To inhibit the function of cholinesterase
C. To decrease the number of synaptic vesicles
D. To promote multiple motor unit summation
E. To inhibit Ca2+ release from the sarcoplasmic reticulum
Answer: B
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The glial cell that defends the body against pathogens is the
A. astrocyte. B. ependymal cell. C. neurolemmocyte. D. microglial cell. E. oligodendrocyte.
What is the function of the converting enzyme secreted by the alveolar capillaries?
A) It makes the respiratory membrane more soluble to gases. B) It causes an increase in the secretion of surfactant. C) It assists in the hormonal regulation of blood volume and pressure. D) It activates parasympathetic nervous components of the autonomic nervous system to cause alveolar smooth muscles to contract. E) All of the answers are correct.
The aortic valve prevents backflow of blood from entering the left ventricle during ventricular diastole
Indicate whether the statement is true or false
Those hormones that are nonpolar can pass through the plasma membrane and are called
A. hydrophilic. B. hydrophobic. C. lipophilic. D. Both hydrophobic and lipophilic are correct.