Tag: digestion of food
Questions Related to digestion of food
As one moves up an ecological pyramid, in general ________________.
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The biomass increases
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Photosynthesis increases
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Energy levels decreases
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Productivity increases
Which one of the following is not used for construction of ecological pyramids?
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Number of individuals
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Rate of energy flow
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Fresh weight
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Dry weight
Fresh weight of organisms and their body parts comprises of water content along with the actual dry weight. The fresh weight is deviating w.r.t metabolism and availability in the same organism or different organisms taken under observation. This makes the standard comparison difficult. Hence, fresh weight is not used for the construction of the ecological pyramid.
The pyramid of energy in terrestrial ecosystem is
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Upright
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Inverted
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Spindle shaped
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Irregular
An example of one way ecological cycle is
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carbon dioxide cycle
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water cycle
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energy cycle
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oxygen cycle
Maintaining ecological balance in future will mainly depend on :
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nature's own process of changes and interaction
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adaptation of all living species to changes in climate
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man's caution and ability to allow nature's own balance to continue
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man's ability to maintain and develop species according to his needs.
Find the odd out and state category of rest ;
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Thymine, Cytosine, Adenine, Pepsin
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Cortisone , Somatotropin, Adrenocorticotropic hormone, Vasopressin
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Cerebrum, Cerebellum, Thalamus, Hypothalamus
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Urea, Creatinine, Ammonia, Uric acid
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Neutrophils, Eosinophils, Basophils, Lymphocytes
(A)Pepsin is not a nitrogenous base.
The undigested, semisolid food is called
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Anus
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Faeces
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Rectum
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Villi
- The human digestive system consists of a long muscular tube and several accessory organs such as the salivary glands, pancreas and gall bladder.
- It is responsible for food ingestion and digestion, absorption of digestion products and the elimination of undigested materials.
- Undigested semi-solid food remaining in the large intestine is called faeces which are eliminated through the anus.
The longest part of the alimentary canal is
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Oesophagus
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Large intestine
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Small intestine
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Stomach
- The alimentary canal includes the mouth, pharynx, oesophagus, stomach, small intestine, large intestine, and anus.
- The longest part of the alimentary canal is small intestine because it is the main organ of absorption and digestion of food.
- The surface area of the small intestine gets increased because of the presence of villi which gives food plenty of time to break down properly. Hence, the longest part of the alimentary canal is a small intestine.
Stomach secretes
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Dilute hydrochloric acid
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Dilute sulphuric acid
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Dilute citric acid
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Dilute nitric acid
- Parietal cells in the stomach contain an extensive secretory network from which the dilute hydrochloric acid is secreted into the lumen of the stomach.
- This dilute Hydrochloric acid activates pepsinogen into the enzyme pepsin, which then helps digestion by breaking the bonds linking amino acids, a process known as proteolysis. Hence, Stomach secretes Dilute hydrochloric acid'
Bile is secreted by
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Stomach
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Small intestine
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Pancreas
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Liver
- Bile is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, that helps in the digestion of lipids in the small intestine.
- In humans, bile is produced continuously by the liver, and stored and concentrated in the gallbladder. Hence, Bile is secreted by the liver.