wt is sympathetic nervous system .....❤
Answers
Answer:
the pns is divided into 2
sympathetic and parasympathetic nervous system.
the sympathetic nervous system stimulate heart beat pupilary dilation inhibits gastric secretion etc.
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Answer:
(1) Sympathetic Nervous System is formed by 22 pairs or sympathetic ganglia. These ganglia are linearly arranged on two sympathetic cords. Sympathetic nerve cords run on either side of the vertebral column.
(2) Sympathetic nerve cords are connected to CNS by rami communicans of spinal nerve fibres.
(3) This system works during stress. pain, anger, fear or emergency. It is supposed to bring about fight, light or fright reactions.
(4) Action of synpathetic nervous system is dependent on adrenaline or noradrenaline. This neurotransmitter is secreted by sympathetic nervous system as an emergency hormones