PHS 3507 Chapter Notes - Chapter 16: Sympathetic Ganglion, Autonomic Nervous System, Adrenal Medulla
22 Sep 2017
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In the ans, by contrast, motor neurons of the. Just one division innervates some organs, but most vital organs receive dual innervation, so they receive instructions form both the sympathetic and parasympathetic divisions. Where dual innervation exists, the 2 divisions commonly have opposing effects: dual innervation with opposing effects is most obvious in the digestive tract, heart and lungs. At other sites, the responses maybe separate or complementary. Provide examples of these reflexes and what they regulate: visceral reflexes play a role in the integration and control of autonomic functions, autonomic reflexes initiated in the viscera. They provide autonomic motor responses that can be modified, facilitated or inhibited by higher centers especially those of the hypothalamus: all visceral reflexes are polysynaptic. They can either be long reflexes or short reflexes: examples: Long reflexes: autonomic equivalents of polysynaptic reflexes, typically coordinate the activities of an entire organ, short reflexes, bypass the cns entirely.
