Structural Organisation in Animals and Plants
- Identify the cells whose secretion protects the lining of gastro-intestinal tract from various enzymes. Answer: 2. Goblet Cells Key idea: Mucus protects the gut lining, and goblet cells secrete mucus. Chief cells secrete pepsinogen, oxyntic (pa... 1
- Match the following structures with their respective location in organs :(a) Crypts of Lieberkühn (i) Pancreas(b) Glisson's Capsule (ii) Duodenum(c) Islets of Langerhans (iii) Small intestine(d) Brunner's Glands (iv) LiverSelect the correct option fr… Answer: 3. (a) (iii) (b) (iv) (c) (i) (d) (ii) Match each structure with its organ. Crypts of Lieberkuhn: glands in the small intestine, so... 1
- The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in : Answer: 4. Bronchioles and Fallopian tubes Ciliated epithelium moves mucus and particles in one direction. In humans it lines the bronchiole... 1
- Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth : Answer: 1. Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum The cockroach alimentary canal runs: mouth, pharynx, oesophagus, c... 1
- Which of the following features is used to identify a male cockroach from a female cockroach ? Answer: 3. Presence of caudal styles Key idea: Male and female cockroaches differ in the last abdominal segments. Males have a pair of threa... 1
- Frog's heart when taken out of the body continues to beat for sometime.Select the best option from the following statements.(a) Frog is a poikilotherm.(b) Frog does not have any coronary circulation.(c) Heart is "myogenic" in nature.(d) Heart is auto… Answer: 3. (c) and (d) An isolated frog heart keeps beating because it is myogenic (the beat starts in the heart muscle itself) and autoexci... 1
- Select the correct route for the passage of sperms in male frogs : Answer: 3. Testes → Vasa efferentia → Kidney → Bidder's canal → Urinogenital duct → Cloaca In a male frog, sperms travel: testes → vasa effe... 1
- Which of the following options best represents the enzyme composition of pancreatic juice ? Answer: 3. lipase, amylase, trypsinogen, procarboxypeptidase Key idea: Pancreatic juice contains inactive and active digestive enzymes for a... 1
- Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme ? Answer: 1. Paneth cells Key idea: The crypts of Lieberkuhn in the intestine hold several cell types. Paneth cells secrete lysozyme and defen... 1
- Smooth muscles are Answer: 4. involuntary, fusiform, non-striated Smooth muscles are involuntary, spindle-shaped (fusiform), uninucleate and non-striated. They... 1
- In the stomach, gastric acid is secreted by the : Answer: 2. parietal cells The parietal (oxyntic) cells of the gastric glands secrete HCl and intrinsic factor. Peptic (chief) cells secrete... 1
- Which of the following guards the opening of hepatopancreatic duct into the duodenum ? Answer: 4. Sphincter of Oddi The sphincter of Oddi guards the opening of the hepatopancreatic duct into the duodenum. The pyloric sphincter... 1
- Which type of tissue correctly matches with its location ?Tissue | Location(1) Smooth muscle | Wall of intestine(2) Areolar tissue | Tendons(3) Transitional epithelium | Tip of nose(4) Cuboidal epithelium | Lining of stomach Answer: 1. Smooth muscle - Wall of intestine Smooth (visceral) muscle forms the walls of hollow organs such as the intestine. 2: Areolar tis... 1