KINESIOL 2Y03 Lecture Notes - Lecture 12: Nerve Tract, White Matter, Phagocytosis

• School: McMaster University
• Department: Kinesiology
• Course: KINESIOL 2Y03
• Professor: Krista Howarth

Document Summary

Contains cytoplasm, nucleus, dendrites (branching off), mitochondria (energy) Interact with other neurons through that neuron"s axon terminal / presynaptic end. Communicate with other neurons / internal + external environment. Arise from cone shaped axon hillock -- right beside this is the initial segment i. Axon hillock + initial segment -- create trigger zone. Before the trigger zone, information is collected, at the trigger zone, the ap is created d. e. Axon collateral - axons branching off the main axon, sending info to other regions. Create / store vesicles in the axon terminal - contain neurotransmitters that can release chemicals, inhibit/stimulate post synaptic cell. Vesicles can also be created at the cell body and move up and down (axonal transport) Axonal transport can be the cause of disease transmission in the cns -- vesicles containing rabies/herpes can enter from the pns and bypass the blood brain barrier. If the vesicle goes up the axon it damages the cell body.