Section1.2

• Autonomic Nervous System


  It plays a criticl role in regulating processes required formaintingphysiological homeotasis and responding to acute stressors.
• Sympathetic Nervous System

  originate from cell bodies in the cell column of the thoracic and lumbar sections of the spinal cord. ( Thoracolumbar)
• SNS activation responses

  increased heart rate and cardiac contractility, vascular vasoconstriction in skin and viscera with shunting of blood flow to skeletal mus- cles, hepatic glycogenolysis, bronchiolar and pupillary dilation, and contraction of the spleen.
• Where does Parasympathetic nerves originate from?

  Parasympathetic nerves originate from cell bodies in the brainstem and sacral sections of the spinal cord
• Sympathetic Stimulation

  The sympathetic nervous system prepares the body for the "fight-or-flight" response by stimulating various organs and tissues (effectors) to prepare for action.
• Blood Vessel Response

  Vasoconstriction and increased blood pressure due to sympathetic stimulation
• Liver Response

  Increased glycogenolysis and ketogenesis due to sympathetic stimulation
• Adrenal Glands Response

  Increased epinephrine and glucocorticoid secretion due to sympathetic stimulation
• Kidney Response

  Increased renin and aldosterone release due to sympathetic stimulation
• Glands Response

  Increased sweat gland secretion and pilorection due to sympathetic stimulation
• Identify


  ,