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प्रश्न
Answer in detail.
Liver does not secrete any enzymes yet it helps indigestion. How?
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उत्तर
The liver does not secrete any enzyme yet it helps in digestion it secretes bile which helps in digestion of fats by breaking down fats into tiny droplets to provide a larger surface area for the enzymes to act. This process is called the emulsification of fats. Bile secreted by the liver is stored in the gall bladder. Bile provides an alkaline medium in the duodenum for the action of enzymes of the pancreatic juice
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संबंधित प्रश्न
If the teeth are not cleaned regularly, they become covered with a sticky yellowish layer W of food particles and bacteria. Since layer W covers the teeth, the alkaline liquid X secreted by glands Y inside the mouth cannot reach the teeth surface to neutralise the acid formed by the action of organisms Z on sugary food, and hence tooth decay sets in.
(a) What is W known as?
(b) What is (i) X, and (ii) Y?
(c) What are organisms Z?
(d) State one way of removing layer W from the teeth.
The partially digested food coming from the stomach of a person enters a long and narrow organ A in his body. The organ A receives the secretion of two glands : liver and pancreas. Liver secretes a greenish-yellow liquid B which is normally stored in the organ C. Pancreas secretes pancreatic juice which contains three digestive enzymes D, E and F. The intestinal juice completes the process of digestion of food. The inner wall of organ A has millions of tiny finger-like projections G which help in the rapid absorption of digested food into blood stream. The undigested part of food then passes into wider tube H which absorbs most of the water from undigested food. The last part of tube H called I stores this undigested food (or waste) for some time. The undigested food is then passed out though opening J as faeces in the process known as K.
(a) Name the organ A.
(b) Name (i) liquid B, and (ii) organ C.
(c) What are the digestive enzymes D, E and F?
(d) Name the projections G present on the inner wall of organ A.
(e) Name (i) tube H (ii) part I (iii) opening J, and (iv) process K.
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Describe the digestion of food in small intestine.
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Secretions of ____________ lubricate the lumen of the alimentary canal.
What will happen if the mucus is not secreted by the gastric glands?
Label the following parts in Figure and name them.
- The largest gland in our body.
- The organ where protein digestion starts.
- The organ that releases digestive juice into the small intestine.
- The organ where bile juice gets stored.
