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Neurons & Neurals Z
Neurons and Neurals Vocabulary - Bio I
| Question | Answer |
|---|---|
| Axon | where electrical impulses from the neuron travel away to be received by other neurons. |
| Dendrite | appendages that are designed to receive communications from other cells. |
| Schwann Cells | a type of glial cell that surrounds neurons, keeping them alive and sometimes covering them with a myelin sheath. |
| Myelin Sheath | an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. |
| Neurotransmitters | a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure. |
| Cell Body | the compact section of a nerve cell that contains the nucleus and the cytoplasm. |
| Axon Terminals | small swellings that are found at the terminal ends of axons. |
| Node of Ranvier | the gaps between the myelin insulation of Schwann cells which insulate the axon of neuron. |
| Secondary Messenger | Second messengers are intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules. |
| Synapse | synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron. |
| Receptors | transmit the actions of bound neurotransmitters. |
| Receptors | transmit the actions of bound neurotransmitters. |
| Chemical signal | A signal carried by molecules such as neurotransmitters between cells. |
| Electrical signal | A change in electrical conditions across a neuron's membrane used to transmit information. |
| Neural signal | A signal transmitted by neurons to communicate information. |
| Nerve impulse | An electrical signal traveling through a neuron. |
| Sensory neuron | A neuron that carries information from sensory receptors toward the central nervous system. |
| Afferent neuron | A neuron that carries information toward the central nervous system. |
| Motor neuron | A neuron that carries signals from the central nervous system to an effector. |
| Effector | A muscle or gland that carries out a response to a nervous or hormonal signal. |
| Motor signal | A signal traveling from the nervous system toward an effector. |
| Motor response | A physical action produced by an effector in response to neural signaling. |
| Behavioral response | An observable action or change in behavior resulting from processing of input. |
| Reflex | A rapid, automatic response to a stimulus. |
| Reflex arc | The neural pathway that produces a reflex response. |
| Neural circuit | A connected group of neurons that processes information or contributes to a behavior. |
| Neural pathway | A route followed by neural information through connected neurons or brain regions. |
| Neural network | A larger interconnected system of neurons and circuits that processes information. |
| Convergent pathway | A pathway in which signals from multiple neurons or sources converge onto fewer neurons. |
| Divergent pathway | A pathway in which one neuron or signal spreads to multiple downstream neurons or circuits. |
| Neural branching | The branching pattern that allows a neuron to communicate with multiple other cells. |
| Circuit activation | The process of neurons in a connected circuit becoming active in response to input. |
| Signal integration | The combining and processing of multiple neural inputs. |
| Information processing | The detection, integration, interpretation, and use of information by the nervous system. |