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

question 2

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)ACh release
• B)action potential propagation down the T-tubules
• C)conformational change in troponin
• D)depolarization of the muscle cell
• E)release of Ca²⁺ from the sarcoplasmic reticulum

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Definitions:

Item-total Correlation

The relationship between individual item scores and the overall score across all items in a test or questionnaire.

Split-half Reliability

An evaluation of reliability involving splitting a test into two sections and comparing scores from each section to check how consistent the test is.

Cohen's Kappa

A statistical coefficient that measures inter-rater agreement for qualitative (categorical) items.

Interrater Reliability

Refers to the degree of agreement among independent observers or raters evaluating the same phenomenon.