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Module 12

Section 2: The muscular system

QuestionAnswer
Which types of muscle are under voluntary control? Skeletal muscles
Examples of smooth muscles Muscles involved in digestion Muscles involved in breathing
What is a muscle fiber? A single muscle cell made up of a bundle of myofibrils, which consist of thin filaments and thick filaments
What condition is characterized by chronic fatigue and muscle weakness? Myasthenia gravis
What is rhabdomyolysis Adverse effect of muscle weakening caused by several medications used to treat high cholesterol
A medication that inhibits skeletal muscle and causes paralysis Succinylcholine
Action and use of bethanechol Action: Stimulates smooth muscles Use: Treat renal retention
Action and use of edrophonium Action: Stimulates skeletal muscles Use: Reverses the effects of the toxin curare, which causes muscle weakening and paralysis
Action and use of dobutamine Action: Stimulates cardiac muscle Use: Treats end -stage heart failure and shock
Action and use of metoprolol Action: Relaxes (inhibits) cardiac muscle Use: Treats hypertension
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