Health Education Paper 2 WASSCE (PC), 2017

Question 7

 

(a)(i)    complete the table of digestive secretions shown below.
           


Digestive secretion

Where produced

Major component of secretion

One function of the component

Saliva

 

Salivary amylase

 

Gastic juice

 

water

 

bile

 

Bile salt

 

Pancreatic juice

 

Mineral salt

 

Intestinal juice

 

sucrase

 

                                                                                                                                    [10 marks]
(a)(ii) State two functions of fat in humans.                                                         [2 marks]
(b) State six functions of the liver.                                                                        [6 marks]
(c) Name two structures of the female reproductive system.                               [2 marks]

Observation

 

  • This question was attempted by many candidates and their performance was poor. In part (a)(i) majority of the candidates could not correctly state where digestive enzymes are produced and their functions. In part (b) they did not do well in it. In part (c) many candidates correctly named structures of the female reproductive system.

    The expected answers are as follows: 

    7. (a) (i)  COMPLETED TABLE


    DIGESTIVE
    SCRETION

    WHERE
    PRODUCED

    MAJOR COMPONENT

    ONE FUNCTION OF EACH
    COMPONENT

    Saliva

    Salivary gland / Mouth

    Salivary amylase

    Digests cooked starch/converts starch to maltose

    Gastric juice

    Stomach / Gastric wall / Cells

    Water

    It aids digestion/enzymes actions

    Bile

    Liver

    Bile salt

    Emulsifies fats/absorption of vitamin K/Neutralises acidic medium

    Pancreatic juice

    Pancreas

    Mineral salt

    Help to increase alkalinity in the intestine

    Intestinal juice

    Small intestine

    Sucrase

    Splits sucrose into glucose and galactose

    1 mark for each column 1x10 = 10marks

    (ii)  FUNCTIONS OF FATS IN HUMANS                      

    • source of energy
    • source of heat / keeps the body warm / insulator
    • rounds off angular contours of the body/provide shape 
    • it protects delicate organs in the body
    • solvent of fat soluble vitamins

    (b) FUNCTIONS OF THE LIVER

    • produces blood cells in early life
    • secretion of bile
    • storage of glycogen
    • deamination/breakdown of protein with  the formation of urea
    • production of plasma protein (albumin and globulin)           
    • desaturation of fats
    • production / storage of vitamins and iron
    • production of heat
    • destruction of various toxic substances and drugs/detoxification
    • production of heparin/prothrombin/fibrinogen
    • stores blood temporarily
    • regulates blood sugar / converts glycogen to glucose
    • destroys old red blood cells

    (c) STRUCTURES OF THE FEMALE REPRODUCTIVE SYSTEM 

    • ovaries
    • fallopian tubes/oviduct
    • uterus/womb
    • cervix
    • vagina
    • clitoris
    • vulva