What are deficiency diseases? Write any three deficiency diseases and its related
nutrient..
2. Define
(a) Yarn (b) Spinning (c) Shearing. (d) Sericulture. (e) Retting
Answers
disease caused due to inadequate intake of an essential nutrients in the diet are called deficiency disease.
pellagra(naicin) skin inflammation, dementia etc
scurvy (vitamin c )- delayed wound healing, international bleeding
iron deficiency anaemia (iron) decreased work output, reduced growth
yarn -
1.
The diseases that are caused by a lack of essential dietary elements and especially a vitamin or mineral are known as deficiency diseases.
Lack of Vitamin A can cause night blindness or poor vision
Lack of Vitamin B1 can cause beri-beri
Lack of Iodine can cause Goitre
2.
a. YARN - It is a continuous length of fibres that are interlocked, and it’s used to produce fabrics, in crocheting, knitting, embroidery and ropemaking.
b. SPINNING
The process of making yarn from fibres is called spinning. In this process fibres from a mass of cotton wool are drawn out and twisted. By this fibres come together to form a yarn.
c. SHEARING
The activity of cutting the wool off a sheep
d. SERICULTURE
Sericulture is the process of cultivating silkworms and extracting silk from them.
e. RETTING
Retting is a process employing the action of micro-organisms and moisture on plants to dissolve or rot away much of the cellular tissues and pectins surrounding bast-fibre bundles, and so facilitating separation of the fibre from the stem.