BGYB30H3 Lecture 14 and 15 Notes Autonomic and Somatic Control Continued and Muscles 1-Oct 29

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University of Toronto Scarborough
Biological Sciences
Ingrid L.Stefanovic

BGYB30H3 Lecture }L[l15 Notes -autonomic nervous system involuntarily controls cardiac, smooth muscle, adipose tissue, and endocrine system -ANS helps to ensure homeostasis of the body by being controlled by the hypothalamus -sympathetic and parasympathetic nervous systems are antagonistic to each other -sympathetic nervous system involves fight or flight responses that involve energetic action -parasympathetic nervous system involves routine body functions such as rest and digestion -most internal organs are under antagonistic control where one autonomic branch is excitatory and the other is inhibitory -sweat glands and smooth muscle are under sympathetic nervous system -in ANS, one neuron diverges unto many post-synaptic neurons -ganglia are interneurons that modulate neurons coming from the CNS to target organs -interneurons integrate sensory info from the periphery of the body to allow output to be sent }2}2LZ]LLL}]L]L~:2:Z]LooZZ}L[]L}o]n input) -hypothalamus, pons (respiration, cardiac and urinary functions), medulla (respiration) control autonomic nervous system -spinal reflexes include
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