A Star at the Tip of the Asymptotic Giant Branch

question 194

Multiple Choice

A star at the tip of the asymptotic giant branch (AGB) is a

• A) cool main-sequence star.
• B) blue supergiant.
• C) star in its first red-giant phase.
• D) red supergiant.

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Definitions:

Pineal Gland

The endocrine gland that secretes the hormone that controls the sleep/wakefulness cycle.

Circadian Rhythms

The natural, internal processes that regulate the sleep-wake cycle and repeat roughly every 24 hours.

Sundowning

A symptom common in some older individuals with dementia, characterized by increased confusion, agitation, and restlessness during the late afternoon or evening.

Alzheimer's Patients

Individuals who suffer from Alzheimer's disease, a progressive neurological disorder that causes memory loss and cognitive decline.