Human digestive system — KCSE Biology

KCSE Biology · 76 practice questions · 3 syllabus objectives

30 easy30 medium16 hard

What You'll Learn

Key learning outcomes for this topic, aligned to the KNEC KCSE syllabus.

Draw and label the human digestive system

State the functions of each part of the digestive system

Human digestive system

Sample Questions

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easySHORT ANSWER4 marks

State the functions of the following parts of the human digestive system: (a) stomach (2 marks) (b) small intestine (2 marks)

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Part (a) — 2 marks

Secretes gastric juices for digestion of proteins (1 mk)

Mechanical churning to mix food and facilitate digestion (1 mk)

Part (b) — 2 marks

Site of nutrient absorption into the bloodstream (1 mk)

Secretes enzymes for digestion of carbohydrates, proteins, and fats (1 mk)

easySHORT ANSWER4 marks

Describe the main functions of the following parts of the human digestive system: (a) stomach (b) small intestine. (4 marks)

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Part (a) — 2 marks

Secretes gastric juices containing hydrochloric acid and enzymes for digestion (1 mk)

Mixes food with gastric juices to form chyme (1 mk)

Part (b) — 2 marks

Completes digestion of carbohydrates, proteins, and fats (1 mk)

Absorbs nutrients into the bloodstream through villi (1 mk)

easySHORT ANSWER3 marks

Define the term 'peristalsis' and explain its role in the human digestive system. (3 marks)

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Part (a) — 1 mark

Peristalsis is the wave-like muscular contractions that move food along the digestive tract (1 mk)

Part (b) — 2 marks

It helps to push food from the oesophagus to the stomach (1 mk)

It aids in mixing food with digestive juices in the stomach and intestines (1 mk)

Which component of the diet is largely responsible for causing dental plaque formation?

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Human digestive system — KCSE Biology

What You'll Learn

Sample Questions

+73 More Questions

Why Practise Human digestive system?

KNEC Aligned

Detailed Marking Schemes

Track Your Mastery

Master Human digestive system for KCSE