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Chemical Coordination and Integration


  • Hormones are chemical messengers that regulate the physiological processes in living organisms.
  • These act upon specific target cells/tissues and organs.

Differences between Hormonal Control and Nervous Control

Hormonal Control Nervous Control
Transmitted chemically through blood Transmitted electro-chemically through nerve fibres 
Transmitted slowly Transmitted rapidly
Affects different organs     Affects specific organs
Is not affected by previous experience Is affected by previous experience
Has both long lasting and short lasting effects Has short lasting effect


  • Exocrine glands – Glands that d…

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