PSYC 100 Lecture Notes - Lecture 15: Efferent Nerve Fiber, Reflex Arc, Axon Terminal

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jill L Atkinson

Document Summary

Explain how the structure of the nervous system determines behaviour. Compare and contrast the divisions of the nervous system (cns vs. pns, etc. ) Cns consists of the brain and spinal cord. Pns consists of the skeletal nervous system, sensory and motor systems. The pns is divided into the skeletal and autonomic divisions. The skeletal division controls voluntary muscle movement through motor afferent system. The autonomic system controls involuntary muscle movement and is extremely important in homeostasis. The autonomic division can be further divided into the sympathetic (fight or flight) and parasympathetic (rest and digest) systems. The autonomic system controls both motor and sensory nerves. Describe the different cells in the cns (afferent and efferent neurons, glia) and their functions. Glia are the support cells of the cns. They function to insulate neurons, clear dead neurons, remove waste, provide oxygen and nutrient supply to neurons and are active during injury of disease.