Question

what is a reflex? what is a reflex? a relationship between an event and a simple response a simple response to a simple event any very simple behavior a purely physiological phenomenon

Answer 1

A reflex is a natural movement brought on by a particular stimulus.

What is stimulus?

A stimulus in physiology is a perceptible alteration in the physical or chemical composition of an organism's internal or external environment. Sensitivity refers to an organism's or organ's capacity to recognize external stimuli and respond appropriately (excitability). As with touch receptors in the skin or light receptors in the eyes, sensory receptors can pick up information from both within and outside the body. Chemoreceptors and mechanoreceptors are examples of internal sensory receptors. A stimulus can trigger a response via stimulus transduction when it is recognized by a sensory receptor. The first element of a homeostatic control system is frequently an internal stimulus.

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