Autonomic Nervous System Notes PDF
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This document provides an overview of the autonomic nervous system. It details the involuntary control of visceral functions like heart rate and blood pressure. The document also explains how sensory impulses are subconsciously perceived.
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What is autonomic nervous system? We cannot control it, our It is a part of Peripheral system that body will do ↓ Controls subconsciously Controls involuntary visceral sensation actions of smooth...
What is autonomic nervous system? We cannot control it, our It is a part of Peripheral system that body will do ↓ Controls subconsciously Controls involuntary visceral sensation actions of smooth e.g. Blood pressure and muscles, viscera and carbon dioxide level in glands blood (Motor component) (Sensory component) ↓ Consists of 2 motor neurons: ↓ ↳ First neuron Second neuron (Preganglionic) (Postganglionic) cell body is in CNS Cell body synapse with axon (myelinated) the first neuron at extends to autonomic autonomic ganglia ganglia where it synapse axon (unmyelinated) with the second neuron extends to the effector organs (viscera, smooth muscles and glands) General features self- governing e.g. HR, BP, urination, m (involuntary defecation, secretion of control) tears) sensory impulses are subconsciously e.g. Oxygen and glucose < perceived concentration in blood
