The Contraction of the Piloerector Muscles (Pilomotor Muscle or Arrector

question 18

Multiple Choice

The contraction of the piloerector muscles (pilomotor muscle or arrector pili) in humans causes __________.

• A) hairs to stand on end,trapping an insulating layer of warm air next to the skin
• B) generation of heat to raise the body temperature
• C) hairs to stand on end to make the individual appear bigger
• D) hairs to stand on end with no apparent function
• E) increased ability to feel pain

---

Definitions:

Marginal Cost

The amount spent on producing an incremental unit of a product or service.

Output

Refers to the amount of product or service produced within a given period by a firm, industry, or country.

Fixed Costs

Expenses that do not change with the level of production or business activity, such as rent, salaries, and utility charges.

Marginal Cost

The charge for the production of one additional unit of a product or service.