Figure 26-1
-Identify the structure labeled "3."
Definitions:
Neck Muscle Activity
The movements and contractions of muscles in the neck region, which support the head and are involved in movement, posture, and expressing emotions.
Glucocorticoids
A class of steroid hormones that play a vital role in the regulation of metabolism, inflammation, and immune response.
Melatonin
Hormone secreted by the pineal gland during the dark phase of the day-night cycle; influences daily and seasonal biorhythms.
Arousal
A physiological and psychological state of being awoken or of sense organs stimulated to a point of perception.
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