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H.1.1 State that homeostasis involves maintaining
internal environment
State that homeostasis involves maintaining internal environment at a constant
level or between narrow limits, including blood pH, water potential, oxygen and
carbon dioxide concentrations, blood glucose and body temperature.
Things maintained by homeostasis:
blood pH (controlled by both nervous and endocrine…

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H.1.4 Explain the control of water potential
Explain the control of water potential including the roles of the hypothalamus, the
posterior pituitary gland and feelings of thirst.
Osmoreceptors in the hypothalamus detect the water potential of the body. If the
water potential is too low, then it will act in…

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