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Nervous System
Neurons & Interneurons
Question | Answer |
---|---|
What is the function of the Nervous System? | to GENERATE, TRANSMIT, and INTEGRATE electrical Impulses for Sensory and Motor functions |
What are Neurons? | FUNCTIONAL units of the NS |
What is the function of Sensory Neurons? | carry info about the Internal or External Environment |
What are the 2 types of Neurons? | Sensory, Motor |
What is the pathway of Sensory Information? | Receptor Cell --> Sensory Nerve --> Spinal Cord --> Brain |
Which Neurons are Afferent? | Sensory = TOWARD the Brain |
Which Neurons are Efferent? | Motor = carry info AWAY from the Brain |
What is the function of Motor Neurons? | carry signals that produce MOVEMENT |
What is the pathway for Motor information? | Brain --> Spinal Cord --> Motor Nerve --> Muscle/Gland |
What is the shape of Sensory Neurons, and where are they located? | Uni-polar - originates in the PNS, Cell Body in the CNS |
What is the shape of Motor Neurons, and where are they located? | Multi-polar = single axon - origintaes in the CNS --> PNS |
What is the function of Interneurons? | LINK Neurons in the Brain and Spinal Cord - enable Sensor INTERPRETATION and Complex ACTIONS |
Which cells make up most of Brain matter? | Interneurons |
Which cells are responsible for some Emotions? | Interneurons: jealousy, lust, appreciation |
What is another name for Interneurons? | Association Neurons |
What is the pathway of Assoication signals? | Snesory Nerve --> Interneuron --> Sensory/Motor Neuron |
What is the function of a Dendrite? | carry info INTO the Cell Body |
What is the function of an Axon? | carry info OUT of the Cell Body |
T/F. The # of Neurons a person has determines their Intelligence? | F. The # of Synapses a person has formed |
T/F. Neurons are Amitotic, therefore a person can never become more Intelligent? | F. Neurons are Amitotic, but Synapses can grow thoughout life |
What is the action that Motor neurons give to Muscle? | Contraction |
What is the action Motor Neurons give to Glands? | Secretion |