PSYC 100 Chapter Notes - Chapter 5: Cerebral Circulation, Brainstem, 5G

• School: University of Maryland
• Department: Psychology
• Course: PSYC 100
• Professor: Ryan Curtis

Document Summary

Axon: the tail; carries the cell"s impulse to the terminal. Axon hillock: start of axon, connects to soma, signals pass through if there"s enough action potential, collects the impulses before sending one down the cell. Dendrites: where neuron receives the signal/impulse from other nerve cells. Schwann cells: insulating cells around axon at different intervals to make up myelin sheath, increases how efficient it can carry an impulse. Soma: body of the neuron, contains the genetic instructions for the function of the cell. Terminal: spreads the cell"s impulse out to reach other neurons. Terminal buttons: links up to the dendrites of the next neuron in the chain. Neurons send messages electrochemically: chemicals cause an electric signal, k+, na+, ca++, cl- Resting potential: inside of neuron is negative, k+ is inside, na+ and cl- is outside, negatively charged protein molecules inside cannot cross thru membrane, resting membrane potential is -70 mv. 70mv: intensity of electrochemical signal is always the same.