In the process of swatting at a mosquito that lands on your hand, the nervous system components involved include sensory receptors, sensory neurons, interneurons in the spinal cord, and motor neurons. When you perceive the mosquito, the sensory receptors in your skin detect the sensation and send signals through sensory neurons to your spinal cord and brain.
The last component of the nervous system to be involved in this process is typically the motor neurons, which carry the signals from the central nervous system to the muscles in your arm and hand, allowing you to execute the swatting motion. The motor neurons are responsible for the actual movement following the decision made by your brain or spinal cord to swat the mosquito.