BIO 1012 Lecture Notes - Lecture 19: Peripheral Nervous System, Axon Terminal, Central Nervous System
4 May 2019
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Neuron function: process and transmit information, resting potential: w/o input there is a normal stable electrical charge, more negative inside the cell membrane, more positive outside the cell membrane, neurons receive, excitatory input (+) Trigger zone/ summation of graded potential: where all the graded potentials are added (summation, summation of graded potentials is the way neuron process information. If membrane potential exceeds threshold potential at the trigger zone the message will be fired down the axon. Action potential: conducts along the entire length of the axon, large and quick, action potential: are the same size and duration regardless of input size. Functional types of neurons: afferent/ sensory neuron, pseudo-unipolar pns cns, efferent neurons cns pns, two types, motor neurons, control skeletal muscle, somatoform neurons, autonomic neurons, control smooth muscle, control cardiac muscles, gland cells, visceromotor neurons. The brain: forebrain, cerebrum, thalamus, hypothalamus, midbrain, hindbrain, pons, medulla oblongata, cerebellum. Connected to: skeletal muscle cell, connected via synapses called, neuromotor junction.
