A diagram of a leg stepping on a tack is indicated. The flow of signal is indicated by arrows. A diagram of the spinal cord with interneurons is indicated on the top. A diagram indicating the lifting the leg is indicated on the right.
Reflex arc is explained in a sequence:
- Sensory receptors stimulate the sensory neurons.
- Sensory neurons transmit the impulse to interneurons in the spinal cord.
- The signal is then transferred to motor neuron.
- The motor neuron stimulates the muscle that lifts the leg.
The parts labeled in the diagram are:
- Sensory receptors
- Sensory neuron
- Interneuron
- Motor neuron
- Effector (responding muscle)
- Spinal cord