Health Education Paper 3 May/June 2015

Question 4

4. The diagram below illustrates the digestive system and associated organs in humans.
Study it carefully and use it to answer questions 4(a), (b) and  (c)  

Hscdiagram04

  

 


(a) Name the parts labeled I,II,III,IV,V,VI,VII and VIII                            [4 marks]

  (b) State three functions each of the parts labelled I and VII.                     [6 marks]

(c)  Mention two disorders associated with the part labelled I                     [2 marks]

Observation

This question was attempted by many candidates and their performance was good.  In part (a) candidates could not correctly  name the parts labelled I,II,III,IV,V,VI,VIII of the digestive system and associated organs in humans.
In part (b), candidates correctly stated functions each of the parts labelled I and III.  In part (c) candidates also correctly mentioned disorders associated with the part labelled I

The expected answers are as follows:

4(a)   NAME OF THE PARTS LABELLED
I   - stomach
II   - pancreas
III  - large intestine
IV – small intestine
V  - anus
VI – appendix
VII – liver
VIII – oesophagus                      

                     
(b)      FUNCTIONS OF PARTS LABELLED I AND III
FUNCTIONS OF PART LABELLED I

  • stores food
  • produces gastric juice
  • produces hydrochloric acid
  • churning of the food materials
  • mixing food materials
  •  
    FUNCTIONS OF PART LABELLED VII

  • detoxification – destroys toxins in the blood
  • deamination     - nitrogen is removed from amino acids and converted to urea
  • converts amino acids to carbohydrates / transamination
  • remove excess glucose from the blood / converts excess glucose to glycogen
  • manufactures and secretes bile into the gall bladder
  • produces heparin
  • produces blood cells
  • storage of iron
  • heat production
  • storage of vitamins/named
  •  
    ( c )    DISORDERS ASSOCIATED WITH PART LABELLED I

  • peptic ulcer
  • gastro enteritis
  • dyspepsia / indigestion
  • constipation
  •