Which of These Is True Regarding the Development of the Ear

question 74

Multiple Choice

Which of these is true regarding the development of the ear?

• A) The internal aspect of the ear forms from the otic placode, a thickening of the surface ectoderm.
• B) The ear begins to form in the 8^th week of development.
• C) The external acoustic meatus develops from mesoderm.
• D) The auricle develops from the otic pit.

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Definitions:

Horizontal Plane

A plane that divides the body into upper and lower parts.

Lymphatic System

A network of tissues and organs that help rid the body of toxins, waste and other unwanted materials, integral to the immune system.

Lymph Nodes

Small, bean-shaped structures in the lymphatic system that act as filters for harmful substances.

Pineal Gland

A small, pinecone-shaped endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.