Neco 2020 Biology Question 7

Practice essay / theory question 7 from the 2020 Neco Biology examination. This question covers Homeostasis, Blood glucose regulation, Endocrine system, Negative feedback .

Neco 2020 Biology Essay / Theory
Topics: Homeostasis Blood glucose regulation Endocrine system Negative feedback
Question 7 NECO • 2020 • BIOLOGY • essay

A 16‑year‑old student measured his blood glucose concentration after a carbohydrate‑rich meal. The reading was 9 mmol/L immediately after eating and fell to 5 mmol/L two hours later. Using this information, answer the following questions.

Question Parts

( a )
Describe the sequence of events that bring the blood glucose level from 9 mmol/L to 5 mmol/L.
( ) Identify the primary hormone released and the main target cells involved.
( ) Explain how this hormone promotes glucose uptake and storage.
( b )
Explain why the regulation of blood glucose in this situation exemplifies a negative‑feedback mechanism. In your answer, name the sensor, the control centre and the effector.
( c )
Predict the likely blood glucose concentration and the symptoms the student would experience if the pancreatic β‑cells were destroyed (type 1 diabetes) and he ate the same meal. Justify your prediction.

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About This Question

This is Neco 2020 Biology Question 7. It is one of the essay questions from the 2020 Neco Biology examination.

The question covers Homeostasis, Blood glucose regulation, Endocrine system, Negative feedback .

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