Nerve+Transmission+and+the+Reflex+Arc

**__Transmission of nerve:__** A nerve cell is like a receiver, transmitter and transmission line with the task of passing a signal along from its **dendrites** to the **axon terminal** bundle. //The **stimulus** triggers an **action potential** in the cell membrane of the nerve cell, and that action potential provides the stimulus for a neighboring segment of the cell membrane. When the action potential reaches the **axon**, it proceeds down that "transmission line" by successive excitation of segments of the axon membrane. Just the successive stimulation of action potentials would result in slow signal transmission down the axon. The speed is considerably increased by the action of the myelin sheath. //
 * =====Transmission of a nerve impulse is called an **action potential** and is conducted the nerve cell, or neuron, that is like a long cord and is called an **axon**. At the end of the axon are **axon terminals that lead to a synapse**. This is where neurotransmitters, chemical messengers, tranfer the impulse to another neuron (interneuron), a muscle (neuromuscular junction), or a gland (target cell). =====
 * The difference in electrical charge between the outer and inner surfaces of the nerve cell membrane makes the transmission of a nerve impulse possible.
 * Transmission of a nerve impulse along an axon **

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// At first your stimulus is negatively charged and then for an example you go and touch a hot stove your stimulus changes to a positive charge. The message travels down your axon. That happens because when you touch the hot stove your neurons were resting and now the sodium opened them up. From **axon terminals lead to a synapse .** Because of that you get a message telling you to pull away in not even a second. // code code ===== = = =__**Reflex Arc**__=


 * A reflex Arc is the nerve pathway involved in a reflex action. Some examples are when you touch a hot stove, and you pull your hand away very fast. Your skin tells your brain that something is wrong. The pathway from the skin to the brain is the reflex arc.
 * ====== The sensory neuron connects to motor neurons through interneurons in the central nervous system. ======
 * ====== The good thing about the reflex arc is that the sensory information is transmitted to you spinal cord and your brain. This helps your fast reaction. ======
 * The interneurons control the activity of the spinal neurons making the muscles contract quickly.