The External, or Visible, Part of the Ear Is Called

question 411

Multiple Choice

The external, or visible, part of the ear is called the

• A)cochlea.
• B)pinna.
• C)inner ear.
• D)tympanic membrane.

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Definitions:

Alkaline

Having a pH greater than 7, indicating a base where concentration of hydroxide ions is greater than that of hydrogen ions.

Blood

A body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away.

pH

A scale measuring the acidity or alkalinity of a solution, where 7 is neutral, values below 7 are acidic, and values above 7 are alkaline.

Buffers

Substances that minimize changes in the pH of a solution by absorbing or releasing hydrogen ions.