1. The receptor reacts to a stimulus. 2. The sensory neuron conducts the afferent impulses to the CNS. 3. The integration center consists of one or more synapses in the CNS. 4. The motor neuron conducts the efferent impulses from the integration center to an effector. 5. The effector, muscle fibers or glands, respond to the efferent impulses by contraction or secretion a product, respectively.
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A reflex arc is a neural pathway that controls a reflex action independently of the brain. Its elements include a sensory receptor, sensory neuron, interneuron in the spinal cord, motor neuron, and effector (muscle or gland) that produces the reflex action. This allows for rapid and automatic responses to stimuli without conscious processing.
An effector is a part of the body (such as a muscle or gland) that carries out the response in a reflex arc. In a reflex arc, when a stimulus is detected by a sensory receptor, a message is sent via a sensory neuron to the spinal cord, where it is processed, and then a message is sent via a motor neuron to the effector causing a response.
The flow of information in a spinal reflex arc occurs in the following order: sensory receptor detects a stimulus, sensory neuron carries the information to the spinal cord, interneuron processes the information in the spinal cord, motor neuron transmits the response to the effector (muscle or gland), and the effector produces a response.
The five parts of a reflex arc are the receptor, sensory neuron, integration center, motor neuron, and effector. The receptor detects a stimulus, and the sensory neuron carries this information to the integration center. The integration center processes the information and sends a signal to the motor neuron, which then activates the effector to produce a response.
A reflex arc begins with the stimulation of a sensory receptor such as those on the skin. The stimulus is then passed as an electrical impulse along sensory, relay and motor neurones (by-passing the brain) before reaching an effector orgen, like a muscle, which then responds to the stimulus.