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Preparation for PPT for Biology 4




Keywords for B4
21st Century Science OCR


Homeostasis
Keeping a steady state inside your body
Receptor
The part of the control system that detects changes in the system and passes this
information to the processing centre
Processing Centre
The part of the control system…

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Preparation for PPT for Biology 4




Organs in the body which remove waste urea from the blood, and balance water and salt
levels
Excretion
The removal of waste products of chemical reactions from cells
Urea
A waste product made by the liver from the breaking down of amino acids the…

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