Biology
Define the following terms:
(a) Digestion
(b) Enzymes
(c) Peristalsis
(d) Dentition
(e) Defaecation
(f) Assimilation
Answer
(a) Digestion — Digestion is any change which makes the food soluble and of such chemical nature that it can be absorbed readily through living membranes.
(b) Enzymes — An enzyme is a protein that acts on a specific substance to form a specific end product. It best acts at a particular temperature and pH.
(c) Peristalsis — It is defined as the rhythmic contraction and relaxation of the muscles of the alimentary canal which pushes the food along the gut.
(d) Dentition — The arrangement of teeth in a particular species is called dentition.
(e) Defaecation — The expulsion of undigested remains of food from the alimentary canal is called defaecation.
(f) Assimilation — It is the conversion of the absorbed digested food into body material.
Related Questions
Name these:
- Two main divisions of the digestive system
- Three digestive glands
- Three pairs of salivary glands
- Three parts small intestine
- Three parts of large intestine
Choose the odd one out and write the category of the remaining terms :
- Pepsin, Trypsin, Steapsin, Erepsin
- Lactase, Peptidase, Invertase, Maltase
- Glucose, Fructose, Galactose, Starch
- Ileum, Colon, Duodenum, Jejunum
- Palate, Crown, Root, Neck
What are the end-products of the digestion of: starch, proteins and fats respectively?
Write the exact locations of the following :
(a) Liver
(b) Sub-mandibular gland
(c) Pylorus
(d) Pancreas
(e) Caecum