Page 138 - Biology_Form_3

Regulation

Explain how the body’s mechanisms 18. A middle-aged patient goes for a
regulate blood sugar and the medical check-up, and the patient’s
consequences due to failure of the results show glucose in the urine.
mechanisms.
(a) What is the possible medical
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15. Explain how blood sugar and body condition of the patient?
fluid pH are regulated.
(b) How does the condition affect
16. A doctor analyzed a patient’s blood glucose regulation?
sample and notices that it contains
plasma proteins, while its tissue fluid (c) Why is glucose normally not
lacks them. found in the urine of a healthy
person?
(a) Explain why did the plasma
proteins remain in the blood and 19. Describe the difference between
not in tissue fluid? positive and negative feedback
mechanisms in endocrine regulation.
(b) What would happen if the plasma Provide an example of each.
proteins could have leaked into
the tissue fluid?

17. Comment on the fact that in cold
and humid weather, humans usually
produce a larger quantity of urine
that is colourless.

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BIOLOGY FORM 3 FINAL EDITED 16.09.2025.indd 131

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