When an Action Potential from a Motor Neuron Arrives at the Neuromuscular

question 16

Multiple Choice

When an action potential from a motor neuron arrives at the neuromuscular junction NMJ) , a series of events occurs that leads to muscle contraction. Which of the following events will occur last i.e., after all of the others) ?

• A) release of Ca⁺⁺ from the sarcoplasmic reticulum
• B) depolarization of the muscle cell
• C) ACh release
• D) conformational change in troponin
• E) action potential propagation down the T- tubules

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Definitions:

Weighted Average

A computation that considers the different levels of significance of the figures in a collection of data, giving greater emphasis to certain numbers over others.

FIFO

An inventory valuation method that assumes the first items purchased are the first items sold, standing for First-In, First-Out.

LIFO

Last In, First Out, an inventory valuation method where the most recently produced or acquired items are recorded as sold first.

LIFO

"Last In, First Out," an inventory valuation method where the last items to be added to inventory are the first ones used or sold.