Biology
Define the following terms:
(a) Excretion
(b) Kidney
(c) Micturition
(d) Osmoregulation
Excretory System
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Answer
(a) Excretion — Excretion is the passing out of substances that have no further use in the body or are harmful.
(b) Kidney — The kidneys are a pair of organs that are found on either side of the spine, just below the rib cage in the back. The Kidneys are powerful chemical factories that perform the following function of removing waste products from the body, filter waste materials out of the blood and pass them out of the body as urine. It also regulates blood pressure and the levels of water, salts and minerals in the body.
(c) Micturition — Urine is expelled from the urinary bladder through the urethra by relaxation of the sphincter muscles located at the opening of the urinary bladder into the urethra under impulse from the nervous system. This process is called micturition.
(d) Osmoregulation — The regulation of osmotic pressure of the blood by regulating its composition (water and electrolyte) is called osmoregulation.
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Related Questions
Write full forms of the following abbreviations:
(a) PCT: ……………
(b) DCT: ……………
(c) ADH: ……………
(d) ORS: ……………
Write the exact location of each of the following:
(a) Kidney
(b) Uriniferous tubule
(c) Malpighian capsule
(d) Loop of Henle
Differentiate between :
(a) Ureter and Urethra (function)
(b) Diabetes mellitus and Diabetes insipidus (hormones involved)
(c) Glycosuria and Albuminuria (abnormal constituents)
(d) Diuresis and Uremia (problem)
(e) Malpighian capsule and Loop of Henle (location)
Give reason/explain:
Excretion is a necessary process of our body.