Answer the following:
Q.1: How many steps are there in the process of nutrition in animals ?
Q.2: The process by which food is taken inside the body of an organism is called _______________.
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 ______________.
Q.4: The process in which the simple, soluble digested food substances are absorbed into the blood is called _______________.
Q.5: The process in which undigested food is removed from the body is called _______________.
Q.6: Paramecium has fine hair-like structures called ____________ all over its body.
Q.7: Hydra has large number of _________ around its mouth which entangle small aquatic animals and kill them.
Q.8: Frog captures its prey with its long, sticky _____________.
Q.9: The mouthparts of insects are modified to form a feeding tube called _______________.
Q.10: _____________ begins at the buccal cavity and ends at the anus.
Ans: alimentary canal
Q.11: Human beings have _____________ for ingestion of food.
Q.12: Chewing mixes the pieces of food with __________.
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 _____________.
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 _____________.
Q.17: The teeth are differentiated on the basis of ___________ and _________.
Ans: structure, functions
Q.18: ______________ are also known as “cutting” teeth.
Q.19: _____________ are also known as “tearing” teeth.
Q.20: ________ and __________ are also known as “grinding” teeth.
Ans: molars and premolars
Q.21: The milk teeth are __________ in number.
Q.22: There are __________ permanent teeth.
Q.23: The bacteria in our mouth reacts with the leftover food and saliva, and forms a thin sticky layer called __________.
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.
Q.27: _________ helps in pushing and swallowing of food into the food pipe.
Q.28: ___________ enables us to speak.
Q.29: The saliva contains an enzyme called ____________.
Q.30: The salivary amylase breaks down the ___________ present in the food into sugars.
Q.31: ____________ are biochemical catalysts which hasten certain metabolic reactions taking place in the body without undergoing any change.
Q.32: The pushing down of food by the walls of the oesophagus in a wave-like is called ______________.
Q.33: The another name of oesophagus is _______________.
Ans: food pipe
Q.34: The stomach is a _________ shaped thick-walled organ.
Q.35: The __________ glands in stomach secrete digestive juices.
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.
Q.38: The _________ protect the inner lining of stomach from the action of enzymes and acid.
Q.39: The food gets converted into a partially digested semi-solid food called _________.
Q.40: The ____________ is the longest part of the alimentary canal.
Ans: small intestine
Q.41: The length of small intestine is ______ metres.
Q.42: The small intestine receives secretions from ________ and _______.
Ans: liver, pancreas
Q.43: __________ is the largest gland in the body.
Q.44: Liver secretes _________ juice.
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.
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 ______________.
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 ___________.