GCSE Biology (AQA)

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Nervous & Hormonal Responses

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Homeostasis and Response Hormonal Coordination in Humans

Nervous & Hormonal Responses

2:28 Human Endocrine System
Spec 4.5.3.1
Previous The Pituitary Gland Next Lowering Blood Glucose Levels
  • Both the nervous and endocrine systems enable body parts to communicate.
  • The nervous system uses electrical impulses; the endocrine system uses chemical messages like hormones.
  • The nervous system also utilizes chemicals to transmit information across synapses.
  • The primary function of both systems is to transmit information.
  • Both systems follow a similar process involving a stimulus, receptor, coordinator, effector, and response.
  • Example of nervous system response: Light receptors in the eye detect a moving ball, the brain coordinates, muscles contract to catch the ball.
  • Example of endocrine system response: Light receptors detect a lion (danger), the brain coordinates, adrenal gland releases adrenaline, heart beats faster, providing energy to run.
  • The coordination center can vary; it could be the brain, pituitary gland, spinal cord, or pancreas.
  • Nervous responses are fast and brief, while hormonal responses are slow and long-lasting.
  • Nervous responses allow for quick reactions to danger, whereas the endocrine system coordinates prolonged processes like growth.

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