Advertisements
Advertisements
Question
State the four ways in which saliva is useful to us.
Advertisements
Solution
The four ways in which saliva is useful to us are:
1. Moistens and lubricates the oral cavity and the tongue to make speaking and swallowing easy.
2. Acts as a solvent, dissolving some part of food to stimulate the taste
3. Cleans the mouth and destroys germs
4. Initiates digestion by converting starch into a simpler form, maltose.
APPEARS IN
RELATED QUESTIONS
Which part of the digestive canal is involved in:
Killing of bacteria ______.
Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans).
Name the three regions of the large intestine.
Define homodont dentition.
Match items in column A with the appropriate items in Column B:
| Column A | Column B | ||
| 1 | HCl | a | Lactose |
| 2 | Rennin | b | Pellagra |
| 3 | Enteropeptidase | c | Rumen |
| 4 | Cellulose | d | Pepsin |
| 5 | Ptyalin | e | Starch |
| 6 | Vitamin | f | Pernicious anaemia |
| 7 | Intestinal juice | g | Trypsin |
| 8 | Bile salt | h | Casein |
| 9 | Vitamin A | i | Micelle |
| 10 | Goitre | j | Night-blindness |
| k | Iodine | ||
Who is telling a lie?
Large intestine: I am 7.5 meter long.
Identify the correct human dental formula.
(i)______ and (ii)______ form the common bile duct.
How do fats get digested in human beings?
In human beings, when the process of digestion is completed, the (i) proteins, (ii) carbohydrates and (iii) fats are respectively finally converted into ______.
