PSYC 211 Lecture Notes - Lecture 2: Axoplasmic Transport, Axon Terminal, Golgi Apparatus
Document Summary
In the cns the oligodendrocytes support axons and produce myelin. In the pns schwann cells perform the same functions. The blood brain barrier: semipermeable barrier between the blood and the fluid that surrounds the cells of the brain. Functions: o provide a balance between substances within neurons and in ecf. An imbalance can disrupt the transmission of messages thus affecting brain functions. Is not uniform through out the ns o in several places the barrier is relatively permeable, allowing substances that are excluded elsewhere to cross freely. > causing it to send messages down its axon o the terminal buttons of the interneuron release a neurotransmitter that excites the motor neuron - The role of inhibition o pain from the heat causes a withdrawal reflect the pain from the heat increases the activity of excitatory synapses on the motor neuron causing the hand to contract and move away.