Neco 2018 Biology Question 3

Practice essay / theory question 3 from the 2018 Neco Biology examination. This question covers nutrition, human digestive system, enzyme action, nutrient absorption .

Neco 2018 Biology Essay / Theory

Topics: nutrition human digestive system enzyme action nutrient absorption

Question 3 NECO • 2018 • BIOLOGY • essay

The diagram provided shows the major parts of the human digestive system.

Question Parts

( a )

Identify the organ where the majority of chemical digestion of carbohydrates occurs. State the principal enzyme(s) involved and briefly describe how they act on dietary carbohydrates.

( b )

The total length of the small intestine is 6.0 m, of which the jejunum measures 2.5 m. Assuming that nutrient absorption capacity is uniformly distributed along its length, calculate the approximate percentage of total nutrient absorption that occurs in the jejunum. Show your working.

( c )

Discuss how a deficiency of pancreatic amylase would affect post‑prandial blood glucose levels after a carbohydrate‑rich meal. Include the roles of digestion, absorption and hepatic glucose regulation in your answer.

( d )

A patient undergoes surgical removal of 30 % of the duodenal length. Predict the likely impact on iron absorption and give a concise physiological explanation for your prediction.

Detailed Solution & Marking Scheme

Get the step-by-step solution, key points required by examiners and detailed marking guidance through the Edcrib AI Tutor.

Reveal Answer

About This Question

This is Neco 2018 Biology Question 3. It is one of the essay questions from the 2018 Neco Biology examination.

The question covers nutrition, human digestive system, enzyme action, nutrient absorption .

View More Neco 2018 Biology Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows

Chat with Support