NUTRITION IN ANIMALS
REVISION
(a) The alimentary canal stretches from ______________ to __________________________ .
(b) Teeth are rooted in separate in
between the .
(c) Digestion of food starts in____________ and gets
completed in __________________ .
(d)________________ is the largest gland in the human body.
2.Boojho took some grains of boiled rice in test tube ‘A’ and
Paheli took boiled and chewed rice in test tube ‘B’. Both of
them poured 1 – 2 drops of iodine solution into the test tube
and observed the colour change. What colour change would
they have observed? Give reasons for your answer.
3.‘A’ got her gall bladder removed surgically as she was diagnosed
with stones in her gall bladder. After the surgery, she faced
problems in digestion of certain food items when consumed in
bulk. Can you tell which kind of food items would they be and
why?
4.Fill in the blanks using the words listed below.
water, front, intestinal, salts, pseudopodia, back, vacuole
(a) The digestion of all food components is completed by
the ____________ juice.
(b) Large intestine absorbs ___________ and some __________
from the undigested food.
(c) Tongue is attached at the _____________ to the floor of
the mouth cavity and is free at the _____________.
(d) Amoeba pushes out _____________ around the food and
traps it in a food _____________.
5.Read the following passage carefully and answer the questions
that follows it.
Bile juice is stored in a sac called, gall bladder, located near its
organ of secretion, liver. The gall bladder releases the bile juice
into the small intestine whenever food reaches there. Though
bile juice is devoid of any digestive enzymes, it is required for
the digestion of fats. The fats cannot be digested easily because
they are insoluble in water and are present as large globules.
Bile juice breaks down big fat droplets into smaller droplets.
These are then easily digested by the enzymes released from
the pancreas.
(a) Which organ secretes the bile juice?
(b) Why is digestion of fats difficult as compared to that of
other nutrients?
(c) How does bile juice help in digestion of fat?
(d) Where is the digestion of fat completed?
(e) Does bile juice digest fat completely?
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