Which of the Following Statements Is TRUE Regarding Skeletal Muscle

question 91

Multiple Choice

Which of the following statements is TRUE regarding skeletal muscle contraction?

• A) During the excitation phase, Ca²⁺ enters the motor neuron through chemically gated channels and causes exocytosis of acetylcholine into the synaptic cleft.
• B) An action potential is generated and propagated along the sarcolemma due to K⁺ influx through voltage gated channels.
• C) The myosin head binds to the actin receptor region once it has hydrolyzed ATP and the regulatory proteins (Troponin and tropomyosin) have been "pulled out of the way."
• D) The powerstroke occurs immediately after the myosin head has hydrolyzed the ATP molecule.
• E) ATP is necessary for coupling to occur, however, Ca²⁺ is only used during maximal force contractions.

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Definitions:

Work in Process

Inventory category that includes goods that are in the production process but are not yet complete.

Cost of Goods Sold

The direct costs attributable to the production of the goods sold by a company.

Underapplied Overhead

Occurs when the allocated manufacturing overhead cost is less than the actual overhead incurred, leading to a shortfall in cost coverage.

Work in Process

Inventory that includes goods partially through the manufacturing process but not yet completed.