| A | B |
|---|
| Regulation | l Is the control and coordination of all life activities |
| Receptors | Are specialized structures that are sensitive to changes in the external and internal environment |
| Neurons | l Are nerve cells |
| Effectors | l Are muscles or glands in which neurons are attached to |
| The Neuron | l Neurons are used for the transmission of impulses from one part of the body to another |
| Dendrites | l Fibers that detect stimuli and generate an impulse toward the cyton |
| Cyton | l Known as the cell body |
| Axon | l A fiber that transmits the impulse away from the cyton and towards the terminal branches |
| Terminal Branches | l The ends of axons that secrete neurotransmitters |
| Synapse | l The gap between the terminal branches of 1 neuron and the dendrites of another neuron. |
| Neurotransmitters | l Chemicals secreted by the terminal branches that aid in the transmission of an impulse across the synapse |
| Receptor | receives the stimulus and initiates an impulse |
| Sensory neuron | carry impulses from the receptors toward the spinal cord and brain |
| . Effector | is a muscle or gland |
| Hydra | Contains no brain or control center, so impulses travel in all directions across a nerve net |
| Chemical Control | Similar to nerve control, chemical control coordinates body processes by transmitting messages from one part of the organism to another |
