6_Unit2.1_NS_Intro copy

Divisions of a neuron soma cell body contains a single

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: . Divisions of a neuron !  Soma (cell body) !  Contains a single, centrally located nucleus !  Responsible for production and transportation of neurotransmitters !  Dendrites !  Projections from soma that receive signals/input from neighboring neurons !  Axon !  Single projection from soma (but can branch) !  Sends signals/input to either other neurons or a target tissue Functional Unit of the NS Functional Unit of the NS form fits function-long neurons--distributive along the brain bundled---makes calculations like interprets shit. The structure (morphology) of individual neurons varies considerably. Function can be inferred from morphology. 3 7/4/12 Compared to dendrites, axons can be quite long (some are over a meter in length). Axons can also vary in thickness and many are covered by a white fatty substance called myelin myelin--covers the axon!!! it is preotective and aids neural transmission Multiple sclerosis-- poeple dont have a myalin sheath so it sucks for them Axons group 1-- thiick --proprioceptive--- fast current might want to put this in the card he didnt say but i think this is testable Axon diameter and the presence of myelin determine the speed of conduction Multiple Sclerosis •  Symptoms vary considerably, but include muscle weakness, speech difficulties, impairments in coordination and balance, acute and/or chronic pain, muscle spas...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online