IGCSE Biology Paper-4: Specimen Questions with Answers 169 - 170 of 279
Question 169
Explanation
Treatment for Type 1 Diabetes Includes
- Taking insulin
Carbohydrate, fat, and protein counting
Frequent blood sugar monitoring
Eating healthy foods
Exercising regularly and maintaining a healthy weight
Question 170
Explanation
Excretion is the removal of metabolic waste (mainly) from the body.
Faecal matter is undigested waste, and not metabolic waste, so it is not considered as excretory product.
The excretory wastes are of two types:
Non-Nitrogenous Wastes
- Carbon dioxide: It is removed through lungs (accessory excretory structure) .
Excess water and excess salts are removed through kidney (primary excretory structure) .
Nitrogenous Wastes
Such wastes are produced from the metabolism of proteins and nucleic acids.
Ammonia
The animals in which ammonia is the major excretory product are called Ammonotelics.
Urea
The animals in which urea is the major excretory product are called Ureotelics.
Urea is less toxic and requires less water for elimination.
Uric Acid
The animals in which uric acid is the major excretory product are called Uricotelics.
Uric acid is least soluble in water and can be stored as a solid waste.