When Troponin Binds Calcium

question 116

Multiple Choice

When troponin binds calcium,

• A) it allows tropomyosin to bind actin.
• B) ion channels open, and sodium rushes into the muscle cells.
• C) it changes conformation, twisting tropomyosin and exposing the actin-myosin binding site.
• D) it changes conformation, exposing the ATP binding site and allowing the actin-myosin bond to break.
• E) it binds to calmodulin and starts a cascade by activating myosin kinase.

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Definitions:

Activity-Based Costing

A costing method that assigns overhead and indirect costs to related products and services based on their use of activities.

Direct Labor Rate

Direct labor rate is the amount paid per hour or unit of work to employees who are directly involved in the production of goods or services.

Direct Materials Cost

The cost of raw materials and components that are directly used in the manufacture of a product.

Traditional Costing

A costing methodology that allocates overhead costs based on a single, volume-based cost driver, often used in less complex manufacturing environments.