Electrical Wires Are Generally Protected by a Tube of Plastic

question 87

Multiple Choice

Electrical wires are generally protected by a tube of plastic. A similar insulating function is performed in the nervous system by a:

• A) myelin sheath.
• B) glial cell.
• C) terminal button.
• D) synapse.

---

Definitions:

Depletion Expense

An accounting and taxation method that allocates the cost of extracting natural resources, such as timber, minerals, and oil from the earth, over their extraction period.

Operating Expense

Ongoing costs for running a product, business, or system, excluding costs directly associated with producing goods or services.

Legal Life

The duration of time that an asset is legally permitted to be utilized, or the period during which a patent or copyright is protected under law.

Useful Life

The estimated period over which an asset is expected to be used before it is considered no longer useful by the owner.