Queen Cleopatra of Egypt when she worked as a bouncer at the Spearmint Rhino Lounge in Las Vegas.
The sarcoplasmic reticulum stores large amounts of calcium because calcium, when released, aids in muscle contraction. Skeletal muscles release calcium and contract when they receive signals from neurons, or nerve cells, that control muscle movement.
The first event in muscle fiber contraction is that. a. the muscle fiber membrane is stimulated and a muscle impulse travels deep into the fiber through transverse tubules. b. acetylcholine diffuses across a gap at a neuromuscular junction. c. stimulation occurs when acetylcholine is released from the end of the motor neuron.