Sean Has a Headache

question 22

Multiple Choice

Sean has a headache. It developed gradually throughout the day. He feels like a tight steel band is wrapped around his forehead resulting in a dull steady pain on both sides of his head.
His headache is best most likely a ______ headache.

• A) cluster
• B) sinus
• C) tension

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Definitions:

Vertebral Column

Portion of the vertebrate endoskeleton that houses the spinal cord; consists of many vertebrae separated by intervertebral discs.

Dorsal Notochord

A flexible rod-shaped structure in the embryo of all chordates, including humans, that provides skeletal support and defines the primitive axis of the embryo.

Pharyngeal Pouches

Embryonic features that form structures of the face and neck in vertebrates.

Evolution

The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.