what happens in the nerve cells when you touch something?

Answer 1

this is concerned with the reflex actions of our response to the environment and it is part of the human nervous system.
At first, keep in mind that:when u touch something the thing is called the stimulus and the receptor is your finger or hand.

MY ANSWER is nerve cells transmit the electrical impulses that are detected by the receptors in our hand or finger that is caused by a stimulus and finally a motor neuron tramits it to an effector which is a muscle this effector generated a response and the person takes his hand or finger away

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Explanation
A reflex action or reflex is a biological control system linking stimulus to response and mediated by a reflex arc. Reflexes can be built-in or learned. For example, a person stepping on a sharp object would initiate the reflex action through the creation of a stimulus, (pain) within specialized sense receptors located in the skin tissue of the foot. The resulting stimulus would be transmitted through afferent, or sensory neurons to the spinal cord. This stimulus is usually processed by an interneuron to create an immediate response to pain by initiating a motor (muscular) response which is acted upon by muscles of the leg, retracting the foot away from the object. This retraction would occur as the pain sensation is arriving in the brain which would process a more cognitive evaluation of the situation.

The nervous tissues are composed of nerve cells and their various processes, together with a supporting tissue called neuroglia, which, however, is found only in the brain and medulla spinalis. Certain long processes of the nerve cells are of special importance, and it is convenient to consider them apart from the cells; they are known as nerve fibers.

Answer 2

They pass an electrical impulse, formed by the movement of charged molecules across their membranes, very quickly from one to another, leading all the way back to your central nervous system (brain and spinal cord) where your brain processes the sensation.

Answer 3

The nervous system transmits electrical impulses to the brain with all the information required by the brain. hot/cold hard/soft etc.

Answer 4

servo chem/electrical reactions. Ever wonder how your brain tells the difference between pleasure and pain?

Answer 5

cell to cell communication