click below
click below
Normal Size Small Size show me how
science 15-1
Term | Definition |
---|---|
Stimulus | A change or signal in an organism's surroundings that causes the organism to react. |
Response | An action or change in behavior that occurs in reaction to a stimulus. |
Neuron | A cell that carries information through the nervous system. |
Nerve impulse | A message carried by a neuron. |
Dendrite | A threadlike extension of a neuron that carries nerve impulses toward the cell body. |
Axon | A threadlike extension of a neuron that carries nerve impulses away from the cell body. |
Nerve | A bundle of nerve fibers. |
Sensory neuron | A neuron that picks up stimuli from the internal and external environment and converts each stimulus into a nerve impulse. |
Interneuron | A neuron that carries nerve impulses from one neuron to another. |
Motor neuron | A neuron that sends an impulse to a muscle or gland, causing the muscle or gland to react. |
Synapse | The junction where one neuron can transfer an impulse to another structure. |
Neuron | A cell that carries information through the nervous. |
Nerve impulse |