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CIE A level Biology Summary Notes, Chapter 15- Coordination
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Summary of Coordinations and a breakdown of each process in both plants and humans
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COORDINATIONNervous System Endocrine System
Electrical impulses are the messengers in the Hormones are the chemical messengers in
nervous system the endocrine system that target cells through
the bloodstream
Brain and the spinal cord constitute the nervous Glands and organs like thyroid, pituitary
system glands and reproductive organs (ovaries and
testes) are involved in the endocrine system
Nerve impulses are transmitted through neurons Hormones are transmitted through blood
vessels
The nervous system is under both voluntary and The endocrine system is under involuntary
involuntary control control
Nerve impulses make use of the The hormones enter into the target cells by
neurotransmitters at synaptic clefts and sodium diffusing through the plasma membrane or by
and potassium channels and enter the target binding to the cell receptors
cells.
Responses are localised Responses are widespread
, Neurone
TYPES OF NEURONES
,
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