Define reflex action. With the help of a flow chart show the path of a reflex action such as sneezing.

Reflex Action: A reflex action is a sudden, involuntary, and spontaneous response to a stimulus that occurs without conscious thought. It is controlled primarily by the spinal cord or brain stem to provide a rapid protective response.

Path of a Reflex Action (Sneezing):

Sneezing is a reflex triggered by irritants in the nasal cavity.

``diagram {"xrange": [-1.0, 1.0], "yrange": [-20.16, 2.16], "lines": [{"from": [0.0, 0.0], "to": [0.0, -3.0], "label": ""}, {"from": [0.0, -3.0], "to": [0.0, -6.0], "label": ""}, {"from": [0.0, -6.0], "to": [0.0, -9.0], "label": ""}, {"from": [0.0, -9.0], "to": [0.0, -12.0], "label": ""}, {"from": [0.0, -12.0], "to": [0.0, -15.0], "label": ""}, {"from": [0.0, -15.0], "to": [0.0, -18.0], "label": ""}], "points": [{"x": 0.0, "y": 0.0, "label": "Stimulus: Irritant (Dust) in Nose"}, {"x": 0.0, "y": -3.0, "label": "Receptors: Nasal Lining"}, {"x": 0.0, "y": -6.0, "label": "Sensory Neuron"}, {"x": 0.0, "y": -9.0, "label": "Relay Neuron (Brain Stem/Spinal Cord)"}, {"x": 0.0, "y": -12.0, "label": "Motor Neuron"}, {"x": 0.0, "y": -15.0, "label": "Effectors: Diaphragm & Abdominal Muscles"}, {"x": 0.0, "y": -18.0, "label": "Response: Sneeze (Expulsion of Air)"}]} ``