Why are neurons called excitable cells? Mention special features of the membrane of the neuron.

(N/A) Neurons are called excitable cells because their membranes are in a polarized state. The neuronal membrane contains various types of ion channels,making it selectively permeable to different ions.
When a stimulus reaches the neuron,it causes a change in the resting membrane potential,leading to depolarization. This disturbance travels along the axon as an action potential.
Special features of the neuronal membrane (neurilemma/axolemma) include:
$(a)$ Excitability: Neurons can respond to stimuli by undergoing a change in their membrane potential,transitioning from a resting state to an active state.
$(b)$ Conductivity: Once an action potential is generated,it is conducted along the entire length of the axon.
$(c)$ Connectivity: Neurons are interconnected to form complex networks,allowing for the transmission of signals to other neurons or effector cells.
$(d)$ Responsiveness: Neurons can process incoming signals and generate appropriate responses to stimuli.