Animal Kingdom
Which one of the following pairs of the kind of cells and their secretion is correctly matched
Oxyntic cells | a secretion with pH between 2.0 and 3.0 |
Alpha cells of islets of Langerhans | secretion that decreases blood sugar level |
Kupffer cells | a digestive enzyme that hydrolyses nucleic acids |
Sebaceous glands | a secretion that evaporates for cooling |
D.
Sebaceous glands | a secretion that evaporates for cooling |
Oxyntic (or parietal) cell is present in the wall of the stomach that produce HCI which forms the part of gastric juice. Oxyntic cell also produce intrinsic factor which is involved in the absorption of vitamin B12 in the small intestine. The pH of gastric acid is 2-3 in the stomach of the lumen. The acidity being maintained by the proton pump, a H+/ K+ ATPase.
Alpha cell ofislets of langerhans secrete glucagon hormone which raises blood glucose level by stimulating liver to convert glycogen to glucose and by stimulating the conservation of fatty acids and amino acids to glucose.
Kupffer cells arc specialized macrophages that disposes of old blood cells and particulate matter. Kupffer cells, named after Karl Wilhem Von Kupffer, are found in the bloodstreams and in the liver, attached to the walls of the sinusoids.
Sebaceous gland is a simple or branched glands in the skin that secrete an oily substance, sebum which is fatty mildly antiseptic material that protects, lubricates, and waterproofs the skin and hair and help prevent dessication.
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Distinguish between intracellular and extracellular digestion?
What is the difference between direct and indirect development?
What are the peculiar features that you find in parasitic platyhelminthes?
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Water vascular system is the characteristic of which group of the following:
“All vertebrates are chordates but all chordates are not vertebrates”. Justify the statement.
How important is the presence of air bladder in Pisces?
What are the modifications that are observed in birds that help them fly?
Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Why?
Segmentation in the body is first observed in which of the following
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