Tuesday, 2 July 2019

Sympathetic nervous system

Organ system: Autonomic nervous system

Function

  • "Fight or flight"
  • To increase heart rate and stroke volume
  • To constrict the capillaries, raise peripheral vascular resistance and blood pressure
  • To increase respiratory rate
  • To inhibit gastrointestinal activity
  • To dilate the pupils (more light enters the retina)
  • To initiate ejaculation and orgasm

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