Multiple Choice QuestionsFood is move along the alimentary canal by the contraction known as
peristalsis
epiglottis
osmosis
cyclosis
A.
peristalsis
Peristalsis is a involuntary movements of gut by which food bolus is moved backword. It is least in rectum.
In horses, rabbits, hares the cellulose gets digested in the
caecum
stomach
appendix
rumen
A.
caecum
Caecum is a small, pouch-like structure which ends into a tubular structure called vermiform appendix.
Villi are present in
large intestine
small intestine
colon
stomach
B.
small intestine
Villi are present in small intestine. They increase surface area which is helpful in absorption.
Below freezing point, the pepsin
becomes over activated
gets destroyed
remains unaffected
gets inactivated
D.
gets inactivated
Pepsin is a non- specific protease. It gets activated at acidic pH (2.0) and is deactivated at neutral or alkaline pH. This is because pepsin moves from the stomach into the duodenum.
The freezing temperature is a temperature at which liquid becomes solid. Pepsin gets inactivated below freezing point because low temperature inactivates the enzymes and increase the frequency of collisions and the formation of enzyme- substrate complex.
The intestinal juice, succus entericus is secreted by
Brunner's gland
Kupffer cells
crypts of Leiberkuhn
goblet cells
C.
crypts of Leiberkuhn
Crypts of Leiberkuhn are multicellular, simple, tubular glands. The secretion of glands collectively called intestinal juices or succus entericus.
Brunner's glands are compound tubular sub- mucosal glands found in the portion of the duodenum.
Kupffer cells are the specialised macrophages loacted in the liver, lining the walls of the sinusoids.
In Pteridium meiosis takes place at the time of
spore formation
organ formation in prothallus
spore germination
gamete formation
A.
spore formation
Spore formed by meiotic division in spore mother cell is the first gametophytic structure in Pteridium.
The pylorous is the constricted part of the alimentary canal which is situated between
stomach and duodenum
oesophagus and stomach
duodenum and ileum
ileum and rectum
A.
stomach and duodenum
Pylorous is constricted part of the alimentary canal present between stomach and duodenum. It is a cone- shaped constriction in the gastro- intestinal tract that connects to the duodenum.
Fatty acids are absorbed by the
lacteals
pylorous
colon
capillaries
A.
lacteals
Lacteals are present in villus absorbed the fatty acids and glycerol molecules.
Pylorus is the opening from the stomach into the duodenum. It prevents intestinal contents from re- entering the stomach.
Colon is a part of large intestine. Its function is to reabsorb fluids and process waste products.
Capillary is a small blood vessel. They are the sites of transfer of oxygen and other nutrients from the bloodstream to other tissues in the body.
Hydrochloric acid in the stomach is secreted by some special type of cells called
peptic cells
goblet cells
oxyntic cells
gastric cells
C.
oxyntic cells
Parietal cells or oxyntic cells are the epithelial cells that secrete hydrochloric acid and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and in the cardia of the stomach.
These cells produce gastric acids.
Peptic cell is a cell in the stomach that releases pepsinogen and chymosin.
Goblet cells are found in the epithelium of many organs. Their main role is to secrete mucus in order to protect the mucous membranes.
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