Reflexes & Receptors (PDF)
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This document provides an introduction to reflexes and the sensory system. It describes the reflex arc, the role of receptors, and the five steps involved in a reflex action. It also discusses how the spinal cord plays a key role in processing sensory input and quickly activating motor neurons to produce a response. The document also includes information on different types of receptors and their functions.
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Reflexes are rapid automatic responses to stimuli An automatic reaction (movement) that happens without thinking about An introduction to reflexes Reflex arc- neural pathway that controls an action reflex Fast involuntary responses to stimuli Wiring of a neural reflex...
Reflexes are rapid automatic responses to stimuli An automatic reaction (movement) that happens without thinking about An introduction to reflexes Reflex arc- neural pathway that controls an action reflex Fast involuntary responses to stimuli Wiring of a neural reflex Five steps Arrival of stimulus and activation of receptor Activation of sensory neuron Information processing Activation of motor neuron Response by effector Queqly - most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain, although the brain will receive sensory input while the reflex action occurs Sense. Receptors-1. A specialized cell or group of nerve endings that responds to sensory stimuli.- organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to sensory nerve. "the retina of the octopus has up to 20 million light receptors„ region of tissue,
