ex phys final

What is a neuromuscular junction? - ANSWER-Junction between motor neuron and muscle fiber What is a motor unit? - ANSWER-Motor neuron and all fibers it innervates What is a motor end plate? - ANSWER-Pocket formed around motor neuron by sarcolemma What is a neuromuscular cleft? - ANSWER-Short gap between neuron and muscle fiber What happens when acetylcholine is released from the motor neuron? - ANSWER-Causes an end-plate potential (EPP) What occurs during depolarization of a muscle fiber? - ANSWER-Muscle fiber becomes more positively charged What is the Sliding Filament Model of Muscle Contraction? - ANSWER-Muscle shortening due to actin and myosin filament movement. What is another name for the Sliding Filament Model? - ANSWER-Swinging Lever-Arm Model. How does muscle shorteni