Which of the Following Is the First Step in Excitation-Contraction

question 295

Multiple Choice

Which of the following is the first step in excitation-contraction coupling?

• A) Exposed actin sites bind with myosin cross bridges.
• B) Sodium channels open in the fibre's membrane.
• C) Calcium is released from the sarcoplasmic reticulum.
• D) Troponin binds calcium.

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Definitions:

Fixed Overhead Budget Variance

The difference between the actual fixed overhead costs incurred and the budgeted fixed overhead costs.

Actual Fixed Overhead Costs

Actual fixed overhead costs are the incurred expenses that do not vary with the level of production or sales, such as rent and salary of permanent staff.

Budgeted Fixed Manufacturing Overhead

The estimated total fixed costs required for the manufacturing process, planned in advance for a specific period.

Materials Price Variance

The difference between the actual cost of materials used in production and the budgeted or standard cost, indicating how effectively a company controls its material costs.