Examlex
The particles making up the ring of Jupiter are composed of bright, reflective ice.
Startle Reflex
An involuntary response to a sudden unexpected stimulus, such as a loud noise or sharp movement.
Internal Organs
Organs located inside the body that perform essential functions necessary for survival, such as the heart, lungs, and liver.
Autonomic
Pertains to the part of the nervous system that controls involuntary actions of the body, such as heart rate and digestion, and is divided into the sympathetic and parasympathetic nervous systems.
Sympathetic
Pertaining to the part of the autonomic nervous system that increases alertness, mobilizes energy, and prepares the body for action.
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