BISC 132 Lecture Notes - Lecture 8: Bronchus, Cone Cell, Cellular Respiration
31 Oct 2016
School
Department
Course
Professor
Document Summary
Signals to muscle cells and between interneurons in brain. Degraded by enzyme to allow muscles to relax. Used by brain to control some movements and pleasure. Degeneration of some dopamine-producing neurons leads to uncontrolled movement parkinson"s disease with pleasure: treated with l-dopa which replaces dopamine and has nothing to do. Too little can cause depression: treated with selective serotonin reuptake inhibitors. Cocaine is not technically a neurotransmitter, but it affects their function. Binds to dopamine reuptake receptors on presynaptic neuron, preventing reuptake. The continued presence of dopamine causes continued signaling of p leasure to the post-synaptic cell. Many other effects, including addiction, permanent brain damage, and death. Cerebrum: synthesizes sensory info, speech, learning, memory, voluntary movements. Several types base on how they are stimulated: Mechanoreceptors sense physical force: sensitive to distortions in cell membrane. Many are mechanoreceptors: located in different layers of skin. Different levels of sensitivity: some areas of skin have more receptors than others.
