Question

F Short-answer questions
E
1. State one funcion each of tongue and eigos
2. How would you show that saline acts on starch
3. How does bile aid in gestion?
4. Define the following terms
(a) Peristalsis
(b) Mastication
5. Write one similarity and difference between
amoeba and human being
6. A bread piece tastes sweet while it is being
swallowed. Why?
7. Why do you think herbivores have a four-
chambered stomach?​

Answer 1

Answer:

• The tongue functions as a digestive organ by facilitating the movement of food during mastication and assisting swallowing. Other important functions include speech and taste.
• Into the first part add iodine drops. You will see that the colour changes to blue indicating presence of starch. To the second part add saliva, mix and keep for 10 minutes. Then add iodine drop, you will see no color change indicating starch being converted to sugar by saliva.
• Bile is a fluid that is made and released by the liver and stored in the gallbladder. Bile helps with digestion. It breaks down fats into fatty acids, which can be taken into the body by the digestive tract.