PSYC 2800 Lecture Notes - Lecture 7: Autonomic Nervous System, Neuroglia, Water Content

• School: Memorial University
• Department: Psychology
• Course: PSYC 2800
• Professor: Anna Rissannen

Document Summary

Humans must maintain their internal environment within certain limits: temperature, acidity, water content, sodium content, glucose concentrations, other physical and chemical factors. Nerve cells (neurons: analyze and transmit information, over 100 billion neurons in system, four defined regions. Presynaptic terminals: stimulation of receptors by psychoactive drugs can activate or inhibit a neuron. Ea(cid:272)h of these defi(cid:374)ed regio(cid:374)s (cid:272)o(cid:374)tri(cid:271)ute to the (cid:374)euro(cid:374)"s a(cid:271)ility to (cid:272)o(cid:373)(cid:373)u(cid:374)i(cid:272)ate (cid:449)ith other neurons, and psychoactive drugs exert effects within each of these regions. Provide firmness and structure to the brain. The blood brain barrier protects the brain from toxic chemicals in the blood. Molecules have to be small and lipophilic to cross the blood brain barrier. Heroi(cid:374) (cid:894)dia(cid:272)etyl (cid:373)orphi(cid:374)e(cid:895), (cid:449)hi(cid:272)h is (cid:373)ore (cid:862)a(cid:272)ti(cid:448)e(cid:863) tha(cid:374) (cid:373)orphi(cid:374)e, is also (cid:373)ore lipophilic. Communication between neurons, can be altered by drugs. Any neuron can have thousands of synapses on it. Found in basal ganglia and other regions. Nigrostriatal dopamine pathway: related to muscle rigidity.