Reaction time
Physiological adaptions are short-term changes in response to a particular environmental stimulus.
The general term for this behavior is tropism. It can take a variety of forms, including phototropism (when the stimulus is light) and chemotropism (when the stimulus is a particular chemical).
The term reflex or phrase reflex action describes a quick spontaneous automatic response to a stimulus that does not involve thinking about it. It is controlled through the brain, but does not require thought.
Behavior
The term that does not belong is "action potential." While excitability, response to a stimulus, and contractility are all related to muscle function and the ability of muscle fibers to react to stimuli, an action potential refers specifically to the electrical impulse that triggers these processes.
Reaction time
The term is "reaction time." It is the time it takes for your body to process a stimulus and generate a response. A shorter reaction time is often associated with quicker reflexes and coordination.
Physiological adaptions are short-term changes in response to a particular environmental stimulus.
The term for responding to a stimulus is called a reaction or a response.
The term for an involuntary reaction to an external stimulus is a reflex.
The plural form for stimulus is stimuli.
Refractory period is the period after a stimulus is given when something needs to recover in a resting state before it can respond to stimulus again. It is a term used in both physiology and psychology.
Stimuli
A response.
A conditioned stimulus is an initially neutral stimulus that becomes associated with an unconditioned stimulus to elicit a conditioned response.
The term for a person's tendency to become familiar with a stimulus due to repeated experiences is "habituation." It is a decrease in response to a stimulus after repeated exposure to it.
The term you are looking for is "reaction" or "response." It describes the action taken as a result of a stimulus or influence.