Calcium Levels in the Body Are Maintained by Hormones

question 76

Multiple Choice

Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secreted by the thyroid gland and sets into motion responses to lower the blood calcium back to the set point. If the blood calcium level falls below a set point, the parathyroid gland secretes parathyroid hormone that sets into motion responses to raise the blood calcium. These homeostatic responses are examples of

• A) positive feedback.
• B) effectors.
• C) sensors.
• D) negative feedback.

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Definitions:

Fixed Expenses

Costs that do not change in total with the level of activity or production volume within a relevant period.

Super-variable Costing

A hypothetical or extreme approach to variable costing where only the most directly variable costs are considered in product or service pricing.

Direct Materials

Raw materials that can be directly attributed to the production of specific goods or services.

Direct Materials

are raw materials that can be directly attributed to the production process of a specific product, such as wood for furniture or metal for cars.