Grade 7 Ch-2: Nutrition in Animals
Very Short Answer:
Q1. Name all the steps involved in nutrition of animals.
Q2. What is the role of Hydrochloric acid in the stomach?
Short Answer:
Q3. Name three glands associated with digestion and write their secretions and function.
Q4. Explain the process of digestion in ruminants, and the role of a four-chambered stomach.
Long Answer:
Q5. Draw a well-labelled diagram of the human digestive system
Answers
VERY SHORT ANSWER
1. The five steps involved in nutrition in animals, including human beings are as follows;
Ingestion.
Digestion.
Absorption.
Assimilation.
Egestion.
2. The hydrochloric acid in the gastric juice breaks down the food and the digestive enzymes split up the proteins. The acidic gastric juice also kills bacteria. ... Together with the bicarbonate, this ensures that the stomach wall itself is not damaged by the hydrochloric acid.
SHORT ANSWER
3.GLAND-SECRETION
Salivary Gland- Saliva
Gastric gland- Gastric juice
Liver -Bile
Pancreas-Pancreatic juice
4. Digestion in ruminants occurs sequentially in a four-chambered stomach. Plant material is initially taken into the Rumen, where it is processed mechanically and exposed to bacteria than can break down cellulose (foregut fermentation).
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