PsychNerves - Psychology 1-28-8 Neuron send signals you...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Psychology 1-28-8 Neuron - send signals, you need a battery to send a signal; signals within neurons are electrical, signals between neurons tend to be chemical; bathed in a solution a lot like seawater (contains Na+, Cl-, K+) has a bipolar semi- permeable membrane Dendrites Soma Axon Axon Hillock - “toll keeper” Ions- charged compounds Anions- negatively charged Too big to get out semi-permeable membrane, therefore stuck inside neuron Na-K pump located in membrane Resting potential- (-70 millivolts) inside membrane relative to outside Electrostatic Gradient- Na+ flows to Anions within membrane Concentration Gradient - liquid flows from high concentration to low concentration Terminal Button - contain synaptic vesicles Synaptic vesicles contain neurotransmitters Neurotransmitters- chemical keys
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Action potential- graphical representation of a neuron sending a signal Myelin- Saltatory (to dance) Conduction- Action potentials dances down the axon, faster, saves energy Nodes of Ranvier- breaks between myelin sheath Multiple Sclerosis - eats away the myelin, as the insulation gets eaten away it begins to misfire Topical anesthetics work by blocking Na+ pumps Synapse Synaptic cleft Electrical - 20 Angstroms- Gap junctions (any place you have to have fast signals) Chemical - 200 Angstroms Presynaptic Cell Voltage dependent Ca+ channels, when voltage changes they change shape, when they change shape calcium enters the cell Happens when Action Potential reaches terminal button
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 5

PsychNerves - Psychology 1-28-8 Neuron send signals you...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online