Digestive Tract

Which one of the following is incorrect for Aves? A Heart is four-chambered and animals are oviparous B The presence of air cavities in bones and the presence of feathers on the body С Digestive tract has additional chambers and animals are homeothermal D The forelimbs are not modified into wings

Select the set of correct statement for given figure :- (A) Oil gland present at the base of tail. (B) Crop and gizzard are present in digestive tract. (C) It is cold blooded animal (D) Air sacs connect to lungs to supplement the respiration.

Given below are some general characters of a chordate . (A) skin is dry without glands, except oil gland at the base of the tail. (B) warm-blooded (homeothermic) animal. (C) The heart is completely four-chambered with right systemic arch. (D) The digestive tract has additional chambers , the crop and gizzard . Identify the animal on the basis of these characters.

Constitute of 50% of lymphoid tissue which located within the major respiratory, digestive & urogenital tract is known as :-

(a) Draw a labelled diagram of the human digestive system. With the help of this diagram, describe the process of digestion of food in man (humans). (b) Describe one way in which the small intestine is adapted for the absorption of digested food. (c) What is the special name of the contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal) ?

Assertion : Gastrin is a hormone that is released from the gastrointestinal tract and helps in digestion Reason : It promotes secretion of HCl and trypsinogen

Consider the following statements (A-C) each with two blanks. A. Animals like Hydra and jelly fis depict ul((i)) symmetry whereas earthworm and leech show ul((ii)) symmetry. B. In ul((iii)) and ul((iv)) digestive tract has only single opening (mouth) and is said to be incomplete. C. Trichinella (Trichina worm) is a cosmopolitan ul((v)) parasite whereas Fasciola (live fluke) lives in the bile ducts of the liver of ul((vi)) Which one of the following options, correctly fills any two statements?

Assertion: Endocrine cells present in different parts of the gastro-intestinal tract secrete four major peptide hormones namely gastrin, secretin, CCK and GIP. Reason: These hormones regulates the secretion of digestive juices and help in digestion.