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Answer :
1. Homeostasis - as currently defined, is a self-regulating process by which biological systems maintain stability while adjusting to changing external conditions.
2. A nerve - is an enclosed, cable-like bundle of nerve fibers (called axons) in the peripheral nervous system.
3. Neurons - (also called neurones or nerve cells) are the fundamental units of the brain and nervous system, the cells responsible for receiving sensory input from the external world, for sending motor commands to our muscles, and for transforming and relaying the electrical signals at every step in between.
4. Afferent - Neurons that receive information from our sensory organs (e.g. eye, skin) and transmit this input to the central nervous system are called afferent neurons.
5. Efferent - Neurons that send impulses from the central nervous system to your limbs and organs are called efferent neurons.
6. Dendrites - They resemble a tree-like structure, forming projections that become stimulated by other neurons and conduct the electrochemical charge to the cell body (or, more rarely, directly to the axons).
7. Cell body - The cell body, or somaf, contains the nucleus of the cell and its associated intracellular structures.
8. Synapse - In the nervous system, a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron or to the target effector cell.
9. Reflex - A reflex, or reflex action, is an involuntary, unplanned sequence or action and nearly instantaneous movement in response to a stimulus.
10. Reflex arc - is a special type of neural circuit that begins with a sensory neuron at a receptor (e.g., a pain receptor in the fingertip) and ends with a motor neuron at an effector (e.g., a skeletal muscle).