PS101 Lecture Notes - Lecture 3: Hypothalamus, Opiate, Pituitary Gland
Document Summary
Post synaptic neuron: signal sent to this neuron. Myelin sheath: insulates axons to prevent it from getting into other. Made of glia cells: provide nourishment, remove waste (like placenta) Damaged can lead to schizophrenia, alzheimer"s. If it doesn"t fit, then it gets reabsorbed (reuptake) Resting potential (the stable, negative charge of a cell when inactive) cell. Action potential (shift in neuron"s electrical charge) v v v v cell mem becomes permeable to allow +ions. All-or-none law (a neuron fires or it doesn"t) Strength is conveyed by rate of firing of a neuron. Neurons transmitting/receiving the signal: (5) (via action potential) Neural networks neuron: patterns of neural networks= perceptions, thoughts, memories, increases in experience, increase our neural network, elimination of less active synapses space b/t pre and post syn. Redirecting bodys resources to respond to emergency (pupils dialate, digestion shuts down) Conserves bodys resources back to homeostasis cortisol is re-released into body.
