PSL201Y1 Chapter Notes - Chapter 7: Axon Hillock, Efferent Nerve Fiber, Resting Potential
Document Summary
Receives and processes info from sensory organs and viscera to determine state of external environment (sensory info) and internal environment (visceral info) Integrates info and activates organs to perform accordingly. Site of learning, memory, emotions, thoughts, language, etc. Peripheral nervous system: neurons that provide communication between central nervous system and organs throughout body. Divides into afferent (sensory) and efferent (motor) neurons: afferent: transmits sensory and visceral info from organs to cns. Special senses (vision, hearing, equilibrium, smell, taste) Visceral senses (fullness, blood pressure, blood ph: efferent: transmits info from cns to effector organs (organs in periphery) Perform functions in response to commands from neurons; usually muscles and glands. Somatic (voluntary): consists of motor neurons which regulate muscle contraction. Autonomic (involuntary): consists of neurons that regulate the function of internal organs and other structures (ex. sweat glands, blood vessels). Divisions: sympathetic: fight or flight" response to stress, parasympathetic: regulates response of sympathetic system.
