Examlex
The primary function of thyrotropin is to stimulate secretion of thyroid hormones.
Sleep-Waking Cycles
The biological rhythm of sleep and wakefulness, typically operating on a 24-hour cycle.
Startle Reflex
An automatic response to sudden, unexpected stimuli, such as loud noises, that is designed to protect the body from potential threats.
Fear
A disagreeable feeling resulting from the conviction that a person or entity poses a risk, may inflict harm, or constitutes a menace.
Emotional Expression
The way in which a person outwardly shows or communicates their emotions, through facial expressions, body language, or verbal communication.
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