HLSC 1200U Lecture Notes - Lecture 18: Reflex Arc, Efferent Nerve Fiber, Schwann Cell
Document Summary
Anatomy: made up brain, spinal cord, and nerves. Organization: central nervous system and peripheral nervous system. Overview of functions of the nervous system: detect changes in internal and external environments, evaluates information, initiate appropriate response. Afferent (sensory neurons): conduct impulses from sensory receptors to cns. Interneurons: processing neurons in cns in between afferent and efferent neurons . Efferent (motor neurons): conduct impulses from cns toward effectors (muscle or glands) - response to stimulus. Somatic nervous system (voluntary) nervous system that carries information and to and from the voluntary skeletal muscles: efferent nerves nerves that send information from the cns to the periphery to cause an effect/response. A signal conduction route to and from the cns, with the electrical signal. Starts at sensory receptors and ends in effector tissue. Two neuron arc: simplest form, consist of afferent and efferent neurons, explains why our hands remove off a hot object without message.
