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JSS1: BASIC SCIENCE - 1ST TERM

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  1. Introduction to Science | Week 1
    4Topics
    |
    1 Quiz
  2. Family Health | Week 2
    6Topics
    |
    1 Quiz
  3. Family Health (Sanitation) | Week 3
    4Topics
    |
    1 Quiz
  4. Family Health (Nutrition) | Week 4
    8Topics
    |
    1 Quiz
  5. Drug and Substance Abuse | Week 5
    3Topics
    |
    1 Quiz
  6. Environmental Pollution: Air Pollution | Week 6
    3Topics
  7. Soil pollution | Week 7
    2Topics
  8. Water Pollution | Week 8
    4Topics
    |
    1 Quiz
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Deficiency diseases refer to those diseases which are caused by a lack of, or shortage of specific nutrients, in the meals we take. They are disorders caused by a lack of specific essential substances such as vitamins, minerals, or amino acids. 

More broadly, the term applies to conditions in which the important substances are present but not absorbed, or in which the organism fails to produce a natural and essential substance. Such diseases as beriberi, scurvy, pellagra, and rickets are caused by a lack of particular vitamins, and recovery is dramatically prompt when adequate quantities of the vitamins are supplied in the diet. 

Deficiency Diseases | Causes and Symptoms:

Below are some deficiency diseases, their causes, and symptoms;

 DiseasesCausesSymptoms
1KwashiorkorLack of protein in diet, common in childrenEnlarged stomach, child looks miserable, growth retardant
Kwashiorkor
2MarasmusProtein deficiencyStunted growth, child looks like a skeleton
Marasmus
3AnaemiaInadequate iron in the dietWeakness, Fainting
Weakness
4BeriberiDeficiency of vitamin B (Thiamine)Nervous disorders (anxiety) fatigue, loss of appetite
5PellagraLack of vitamin B3 (Niacin)Skin disorders, soreness at the corners of the mouth
Pellagra
6ScurvyDeficiency of vitamin CBleeding gums, weak teeth
scurvy
7RicketsDeficiency of vitamin DDeformed bones
Rickets
8Night blindnessLack of Vitamin AInability to see in dim light
9GoiterLack of iodine in dietEnlargement of thyroid gland i.e swelling beneath the jaw Goiter

10OedemaExcess sodium in the body fluidSwelling ankles, weakness, common in adults and pregnant women
Oedema

Evaluation Questions:

1. List the 6 (six) classes of food.

2. Define balanced diet.

3. State the functions of the following classes of food:

(a) Carbohydrate

(b) Protein

(c) Fats and oil

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