Ch – 2 Nutrition In Animals

Answer the following:

Q.1: How many steps are there in the process of nutrition in animals ?

Ans: Five

Q.2: The process by which food is taken inside the body of an organism is called _______________.

Ans: Ingestion

Q.3: The process of breakdown of complex, soluble food substances into simple, soluble food substances with the help of digestive juices prepared by the body is called ______________.

Ans: Digestion

Q.4: The process in which the simple, soluble digested food substances are absorbed into the blood is called _______________.

Ans: Absorption

Q.5: The process in which undigested food is removed from the body is called _______________.

Ans: egestion

Q.6: Paramecium has fine hair-like structures called ____________ all over its body.

Ans: cilia

Q.7: Hydra has large number of _________ around its mouth which entangle small aquatic animals and kill them.

Ans: tentacles

Q.8: Frog captures its prey with its long, sticky _____________.

Ans: tongue

Q.9: The mouthparts of insects are modified to form a feeding tube called _______________.

Ans: proboscis

Q.10: _____________ begins at the buccal cavity and ends at the anus.

Ans: alimentary canal

Q.11: Human beings have _____________ for ingestion of food.

Ans: mouth

Q.12: Chewing mixes the pieces of food with __________.

Ans: saliva

Q.13: The digestion of food inside the buccal cavity is known as _______________.

Ans: mechanical digestion

Q.14: The process of chewing and mixing the pieces of food with saliva is known as _____________.

Ans: mastication

Q.15: The digestive tract and associated glands together constitute the ________________.

Ans: digestive system

Q.16: The white and hardest substance which covers the teeth is called _____________.

Ans: enamel

Q.17: The teeth are differentiated on the basis of ___________ and _________.

Ans: structure, functions

Q.18: ______________ are also known as “cutting” teeth.

Ans: incisors

Q.19: _____________ are also known as “tearing” teeth.

Ans: canines

Q.20: ________ and __________ are also known as “grinding” teeth.

Ans: molars and premolars

Q.21: The milk teeth are __________ in number.

Ans: 20

Q.22: There are __________ permanent teeth.

Ans: 32

Q.23: The bacteria in our mouth reacts with the leftover food and saliva, and forms a thin sticky layer called __________.

Ans: plaque

Q.24: A ___________ is a special strong thread that is moved back and forth through the spaces between the teeth.

Ans: dental floss

Q.25: The first ultrasound toothbrush is known as __________.

Ans: emmident toothbrush

Q.26: The ___________ is a fleshy muscular organ attached at the back to the floor of the buccal cavity.

Ans: tongue

Q.27: _________ helps in pushing and swallowing of food into the food pipe.

Ans: Tongue

Q.28: ___________ enables us to speak.

Ans: tongue

Q.29: The saliva contains an enzyme called ____________.

Ans: amylase

Q.30: The salivary amylase breaks down the ___________ present in the food into sugars.

Ans: starch

Q.31: ____________ are biochemical catalysts which hasten certain metabolic reactions taking place in the body without undergoing any change.

Ans: Enzymes

Q.32: The pushing down of food by the walls of the oesophagus in a wave-like is called ______________.

Ans: peristalsis

Q.33: The another name of oesophagus is _______________.

Ans: food pipe

Q.34: The stomach is a _________ shaped thick-walled organ.

Ans: J

Q.35: The __________ glands in stomach secrete digestive juices.

Ans: gastric

Q.36: ___________ kills many harmful bacteria that enter our stomach and also enhances the action of digestive enzymes.

Ans: Hydrochloric acid

Q.37: _________ digests the proteins in the food to form simple soluble substances called peptones.

Ans: pepsins

Q.38: The _________ protect the inner lining of stomach from the action of enzymes and acid.

Ans: mucus

Q.39: The food gets converted into a partially digested semi-solid food called _________.

Ans: chyme

Q.40: The ____________ is the longest part of the alimentary canal.

Ans: small intestine

Q.41: The length of small intestine is ______ metres.

Ans: 7.5

Q.42: The small intestine receives secretions from ________ and _______.

Ans: liver, pancreas

Q.43: __________ is the largest gland in the body.

Ans: liver

Q.44: Liver secretes _________ juice.

Ans: bile

Q.45: Bile juice is stored in _____________.

Ans: gall bladder

Q.46: ____________ breaks big droplets of fats into small droplets and makes digestion easier.

Ans: bile juice

Q.47: ____________ is a cream coloured gland located below the stomach.

Ans: pancreas

Q.48: The ______________ act on carbohydrates and proteins and changes them into simpler forms.

Ans: pancreatic juice

Q.49: Digestion of food starts in _________ and ends in ______________.

Ans: mouth, small intestine

Q.50: When intestinal juices act upon, the carbohydrates get broken into ______________.

Ans: glucose

Q.51: When intestinal juices act upon, the fats get broken into ________________ and _________.

Ans: fatty acids, glycerol

Q.52: When intestinal juices act upon, the proteins get broken into ________.

Ans: amino acids

Q.53: The __________ and __________ are absorbed by cells in their original form.

Ans: minerals and vitamins

Q.54: The process of absorption occurs in ____________.

Ans: small intestine

Q.55: The inner wall of stomach has finger like projections known as ___________.

Ans: villi

Published by Priya Prakash

In the midst of winter, i found there was within me an invincible summer ~ Albert Camus

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