What is the Impulse generator and transmitter in nervous system?

In the nervous system, there are specialized structures responsible for generating and transmitting impulses. These structures are:

Impulse Generator:

1. Sensory Receptor: Sensory receptors are specialized structures that detect various stimuli, such as light, sound, touch, temperature, and chemicals, and convert them into electrical signals.

2. Nerve Cell Body (Soma): The nerve cell body contains the cell's nucleus and other essential organelles. It is responsible for integrating the incoming signals and generating an output response.

Impulse Transmitter:

1. Axon: The axon is a long, slender projection that extends from the nerve cell body and conducts the electrical impulses away from the cell. It is covered by a myelin sheath in most neurons, which increases the speed and efficiency of impulse transmission.

2. Synapse: The synapse is the junction where the axon of one neuron communicates with another neuron or target cell. It consists of a presynaptic terminal, synaptic gap, and postsynaptic membrane. Neurotransmitters are released from the presynaptic terminal into the synaptic gap and bind to receptors on the postsynaptic membrane, influencing the activity of the receiving cell.

Together, the impulse generator and transmitter components of the nervous system enable sensory information to be received, processed, and transmitted throughout the body, allowing for appropriate physiological responses and coordination within the nervous system.