Which of the Choices Below Explains Why the Arterioles Are

question 61

Multiple Choice

Which of the choices below explains why the arterioles are known as resistance vessels?

• A) The contraction and relaxation of the smooth muscle in their walls can change their diameter.
• B) They contain a large quantity of elastic tissue.
• C) They distribute blood to various parts of the body.
• D) Their prime function is the exchange of nutrients and wastes between the blood and tissue cells.

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Definitions:

Proton

One of the three principal parts of an atom. The proton has a positive charge.

Ionization Potential

The amount of voltage or potential that must be applied to cause ionization of a gas.

Atmospheric Pressure

The pressure exerted by the weight of the atmosphere at any given point, usually measured in millibars (mb) or atmospheres (atm).

Voltage

An electrical measurement of potential difference, electrical pressure, or electromotive force (EMF).