Which of the Following Involves Positive Feedback

question 28

Multiple Choice

Which of the following involves positive feedback?

• A)An elevated level of T3 inhibits release of TSH (thyroid-stimulating hormone)
• B)Stimulation of stretching of the cervix and uterine contractions by oxytocin
• C)Control of calcium levels in the blood by parathyroid hormone
• D)Secretion of insulin and glucagon in response to the level of blood glucose

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Definitions:

Fixed Costs

Fixed costs are business expenses that remain constant regardless of production volume, such as rent, salaries, and insurance premiums.

Variable Costs

Costs that change in proportion to the level of goods or services produced by a business.

Net Income

The amount of profit remaining after all expenses, taxes, and costs have been deducted from total revenue.

Break-even Point

The point at which cost or expenses and revenue are equal, resulting in neither profit nor loss.