31) Chemicals associated with digestion are NOT produced in the a) pancreas b) l

Question

31) Chemicals associated with digestion are NOT produced in the a) pancreas b) liver c) gallbladder d) intestinal mucosa e) chemical s associated with digestion are produced in all of these testine? 32) Which of these facilitates nutrient absorption in the in a) villi b) microvilli c) circular folds d) lymphatic lacteals e) all of these 33) The colon is primarily associated with a) Water reabsorption b) Vitamin synthesis and absorption c) Mechanical digestion d) Both A and B e) A, B, and C 34) The excretory system is responsible for regulating a) Nitrogenous wastes b) Water concentration c) Electrolyte concentration d) Both A and B e) All of these 35) Which of these is NOT derived from the metanephric duct in amniotes? a) ureter b) renal pelvis c) major calyx d) collecting duct e) all of these are derived from the metanephric duct of amniotes epithelium 6) The bladder and ureters of mammals are lined with a) Stratified squamous b) Pseudostratified columnar c) Transitional d) Stratified cuboidal e) Stratified columnar

Explanation / Answer

31] Option [ c] gall bladder

Gall bladder is a small spherical structure associated with the liver. It stores bile juice produced by the liver and secretes it into the duodenum through a duct. It doe not produce bile juice, it only stores it.

All the others produce digestive juices which help in digestion.

32] Option [ e] all of these

Villi are folds in the internal lining of the small intestine walls which have a rich supply of blood vessels. They facilitate absorption of nutrients by increasing the surface area of the inner walls and also by the rich blood supply.

Microvilli are microscopic cellular membrane protrusions on the villi which also help in absorption of nutrients.

The circular folds , also called valve of Kerckring , are large valvular flaps projecting into the small intestinal lumen and help in absorption.

Lacteals are lymphatic cappillaries that absorb dietary fats in the villi of the small intestine.

33] Option [a] water reabsorption

The undigested waste matter moves from the small to the large intestine. The colon is the lowermost part of the large intestine. Here, excess water is reabsorbed from the waste matter and the faeces is formed. The faeces moves to the rectum where it is stored and excreted out as solid waste matter.

34] Option [e] All of these when the blood is filtered in the bowman's capsule, the filterate moves into the urinary tubule. As it passes through a proximal tubule and the Henle's loop, much of the water useful proteins and electrolytes are reabsorbed. Urea is not reabsorbed and is excreted out as urine.

35] Option [e] All of these are derived from thr metanephric duct in amniotes as all of these are a part of the uniary tract.

36] Option [c] Transitional Epithelium. Because transitional epithelial tissue are able to stretch significantly to acomodate large volume of urine in the bladder. It also provides protection to the underlying tissues from acidic or alkaline urine.

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