{"id":15875,"date":"2022-05-13T23:00:29","date_gmt":"2022-05-13T17:30:29","guid":{"rendered":"https:\/\/cbselibrary.com\/?p=15875"},"modified":"2023-11-10T12:08:11","modified_gmt":"2023-11-10T06:38:11","slug":"selina-icse-solutions-class-10-biology-excretory-system-elimination-body-wastes","status":"publish","type":"post","link":"https:\/\/cbselibrary.com\/selina-icse-solutions-class-10-biology-excretory-system-elimination-body-wastes\/","title":{"rendered":"Selina Concise Biology Class 10 ICSE Solutions The Excretory System (Elimination of Body Wastes)"},"content":{"rendered":"
APlusTopper.com provides step by step solutions for Selina Concise ICSE Solutions for Class 10 Biology Chapter 8 The Excretory System (Elimination of Body Wastes). You can download the Selina Concise Biology ICSE Solutions for Class 10 with Free PDF download option. Selina Publishers Concise Biology for Class 10 ICSE Solutions all questions are solved and explained by expert teachers as per ICSE board guidelines.<\/p>\n
Download Formulae Handbook For ICSE Class 9 and 10<\/a><\/p>\n ICSE Solutions<\/a>Selina ICSE Solutions<\/a><\/p>\n Selina ICSE Solutions for Class 10 Biology Chapter 8 The Excretory System (Elimination of Body Wastes)<\/strong><\/p>\n Exercise 1<\/strong><\/span><\/p>\n Solution A.1.<\/strong><\/span> Solution A.2.<\/strong><\/span> Solution A.3.<\/strong><\/span> Solution A.4.<\/strong><\/span> Solution B.1.<\/strong><\/span> Solution B.2.<\/strong><\/span> Solution B.3.<\/strong><\/span> Solution C.1. Solution C.2.<\/strong><\/span> Solution C.3.<\/strong><\/span> Solution C.4.<\/strong><\/span> Solution C.5.<\/strong><\/span> Solution C.6.<\/strong><\/span> Solution C.7.<\/strong><\/span><\/p>\n (a) Bowman’s capsule<\/strong>\u00a0is a thin walled cup containing the glomerulus. This Bowman’s capsule along with the glomerulus is known as\u00a0malpighian capsule<\/strong>.<\/p>\n (b) The\u00a0renal cortex<\/strong>\u00a0is the outer darker region of the kidney whereas the\u00a0renal medulla<\/strong>\u00a0is the inner lighter region of the kidney.<\/p>\n (c) Renal pelvis<\/strong>\u00a0is the expanded front end of the ureter in the kidney whereas the\u00a0renal papilla\u00a0<\/strong>is the apex of the renal pyramid which projects into the pelvis.<\/p>\n (d) Urea<\/strong>\u00a0is the chief excretory product which is excreted in the form of urine whereas\u00a0urine<\/strong>\u00a0is the filtrate left after reabsorption and tubular secretion which contains 95% water and 5% solid wastes.<\/p>\n (e) Excretion<\/strong>\u00a0is the process of removal of chemical wastes especially nitrogenous wastes from the body. Solution C.8.<\/strong><\/span> Solution C.9.<\/strong><\/span><\/p>\n
\n(c) Removal of nitrogenous wastes<\/p>\n
\n(a) Proximal convoluted tubule<\/p>\n
\n(c) Sweating<\/p>\n
\nLiver<\/p>\n
\n(a) Liver
\n(b) Cortex
\n(c) Glomerulus
\n(d) Collecting duct
\n(e) Renal artery (Renal vein has urea but renal artery has higher concentration of urea as compared to renal vein).<\/p>\n
\n(a) Afferent arteriole, glomerulus, efferent arteriole, capillary network, renal vein
\n(b) Renal artery, kidney, ureter, urinary bladder, urethra<\/p>\n
\n(a) Ultrafiltration
\n(b) Excretion
\n(c) Osmoregulation
\n(d) Excretion<\/p>\n
\n<\/strong><\/span>(a) Glomerulus<\/strong>\u00a0is involved in the process of ultrafiltration.The liquid part of the blood which is plasma including urea, salts, glucose filters out from the glomerulus into the renal tubule.
\n(b) Henle’s loop<\/strong>\u00a0is involved in reabsorption of water and sodium ions.
\n(c) Ureter<\/strong>\u00a0carries urine to the urinary bladder by ureteral peristalsis.
\n(d) Renal artery<\/strong>\u00a0supplied blood to the kidney.
\n(e) Urethra<\/strong>\u00a0is involved in the process of micturition i.e. expelling urine out of the body.<\/p>\n
\nExcretion helps in removing toxic wastes from our body and it also plays an important role osmoregulation i.e. the maintenance of the homeostasis of the body.
\nCarbon dioxide, water, nitrogenous compounds such as urea, uric acid and excess salts are some common excretory products.<\/p>\n
\nA uriniferous tubule also known as the kidney tubule is the structural and functional unit of the kidney.
\nIt takes in impure blood from the renal artery and removes wastes in the form of urine. It also provides a larger surface area for reabsorption of salts and water.<\/p>\n
\nMaintaining a normal osmotic concentration in the body means regulating the percentage of water and salts. If this regulation mechanism fails we either end up losing vital salts and water or may accumulate unwanted salts and excess water in our body.<\/p>\n
\nIf one kidney is donated to a needy patient, the other kidney alone is sufficient for removing wastes or excretion. Thus, the donor can live a normal life.<\/p>\n
\nDuring summer, a considerable part of water is lost through perspiration so the kidneys have to reabsorb more water from the urine. This makes the urine thicker in summer than in winters.<\/p>\n
\nCatabolism\u00a0<\/strong>on the other hand is the set of metabolic pathways which break down molecules into smaller units and release energy.<\/p>\n
\nUrea, creatinine, uric acid<\/p>\n