Question

Function of nervous tissue is

• A. Irritability or excitability
• B. Contraction
• C. Responsiveness
• D. None of the above

Answer 1

The correct option is A Irritability or excitability

Irritability is the ability of all biosystem or cells to answer the stimulation or action of external and internal environment by a change in metabolism. This property is common to all the cells in the body. Excitability is the property of cell fluid, that permits them to react to stimuli from the environment by a change in membrane potential or generation of an action potential or the capacity of cells to respond to stimuli. This is only applicable to the nerve, muscle and certain secretory cells.