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Science CBSE Homework Assignments
Class 7
Nutrition in animals
Digestive system and buccal cavity
1.
Buccal cavity, ingestion, glands and intestines.
Question:
5
m.
Choose the correct answer
:
[
Note
:
There may be more than one option that are right
]
1
.
Which of the following statements regarding villi is true?
They are thin, finger-like outgrowths that increase the surface area
Villi increases the surface area of the small intestine
Villi decreases the surface area of the small intestine
Villi increases the surface area of the large intestine
2
.
Which of the following is false of peristalsis?
It involves rhythmic contraction and expansion of the lining of muscles of oesophagus
Peristalsis pushes the food from stomach to the mouth
Peristalsis takes place only in the mouth
Peristalsis pushes the food from the mouth to the stomach
3
.
First step in nutrition in animals:
Teeth allows mixing of saliva with the food
Food is ingested through the mouth
Ingestion
Chewing of food through teeth
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