TEST8 - Skeletal muscles are attached to bones by: Correct...

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Skeletal muscles are attached to bones by: Correct Answer: C. tendons. Movement away from the body is produced by: Correct Answer: C. extensor muscles. Muscles that work in opposition to each other are called: Correct Answer: C. antagonistic muscles. Actin and myosin molecules are organized into functional units called: Correct Answer: D. sarcomeres. Skeletal muscles are also called: Correct Answer: A. striated muscles. Thin myofilaments are made of the protein: Correct Answer: C. actin. Thick myofilaments are made of the protein: Correct Answer: D. myosin. Most muscles are innervated by: Correct Answer: C. alpha motor neurons. Alpha motor neurons control: Correct Answer: D. extrafusal muscle fibers. At the presynaptic terminal of an alpha motor neuron we find the: Correct Answer: B. motor end plate. The neuromuscular junction consists of the alpha motor neuron and the: Correct Answer: B. extrafusal muscle fiber. The neurotransmitter at the neuromuscular junction is: Correct Answer: B. acetylcholine (ACh). A decrease in postsynaptic receptors at the neuromuscular junction is caused by the neuromuscular disorder: Correct Answer: A. myasthenia gravis. The alpha motor neuron and the muscle fibers it controls comprise a: Correct Answer: A. motor unit. A sprinter primarily uses:
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Correct Answer: B. fast-twitch muscle fibers. Which type of muscle fatigues the slowest? Correct Answer:
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This note was uploaded on 02/14/2012 for the course PSYCH 3 taught by Professor B during the Fall '09 term at Irvine Valley College.

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TEST8 - Skeletal muscles are attached to bones by: Correct...

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