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Unconditioned Reflex (Noun)

An automatic instinctive unlearned reaction to a stimulus.

Nouns denoting acts or actions.

Babies exhibit an unconditioned reflex when they suck on anything placed in their mouths due to the rooting reflex.
Eye blinking in response to a sudden loud noise is a prime example of an unconditioned reflex that humans cannot control.
Pulling away your hand quickly from something very hot is a rapid and involuntary action showing the characteristics of an unconditioned reflex.
During sneezing and coughing our diaphragm and muscles create sudden actions that are controlled by unconditioned reflexes embedded within our nervous system.
The need to gag or choke when a foreign object is inserted too far into the throat indicates that such attempts initiate an unconditioned reflex guarding the airway.