PS101 Lecture Notes - Lecture 4: Sympathetic Nervous System, Hindbrain, Acetylcholine
Document Summary
Ps101 - lecture 4 - the brain part 1. Specialized cells that carry messages throughout the nervous system. Electrochemical exchange - both electrical and chemical. Afferent neurons (sensory) - relay information from the senses to the brain and spinal cord. Efferent neurons (motor) - send information from the central nervous system to the glands and muscles, enabling the body to move. Receives info from dendrites, and if enough stimulation is received, the message is passed on to the axon. Receive info from other neurons and sensory receptors. Carries the neuron"s message to the terminal buttons. Myelin sheath - protective cover (ex lawn mower cord) A type of glial cell that covers segments of the axon to insulate and speed the neural impulses. Terminal buttons (of axon) form junctions with other cells and releases chemicals called neurotransmitters (*we will never need to draw or label a neuron; we will need to explain what the parts are/do)
