Excretion
Telangana Board · Class 10 · Biology
Flashcards for Excretion — Telangana Board Class 10 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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What is excretion? Define this life process.
Answer
Excretion is the biological process involved in the separation and removal of wastes or non-useful products from the body. It comes from Latin words 'ex' meaning 'out' and 'crenere' meaning 'shift'. I…
List the main components of the human excretory system.
Answer
The human excretory system consists of: 1) A pair of kidneys 2) A pair of ureters 3) Urinary bladder 4) Urethra. These organs work together to filter blood and remove waste products from the body.
What is a nephron and why is it called the functional unit of the kidney?
Answer
A nephron is the structural and functional unit of the kidney. Each kidney contains 1.3-1.8 million nephrons. It's called the functional unit because it performs the actual work of filtration, reabsor…
Name the parts of a nephron in correct sequence.
Answer
The parts of nephron in sequence are: 1) Bowman's capsule (containing glomerulus) - forms Malpighian body 2) Proximal Convoluted Tubule (PCT) 3) Loop of Henle (U-shaped) 4) Distal Convoluted Tubule (D…
Explain the four stages of urine formation.
Answer
The four stages are: 1) Glomerular filtration - blood is filtered under high pressure in glomerulus, forming primary urine 2) Tubular reabsorption - essential substances and water are reabsorbed from …
Why is the diameter of efferent arteriole smaller than afferent arteriole?
Answer
The efferent arteriole has a smaller diameter than the afferent arteriole to create high pressure in the glomerulus. This pressure difference is essential for effective filtration of blood. The high p…
What is the composition of normal human urine?
Answer
Normal urine contains: 96% water, 2.5% organic substances (urea, uric acid, creatinine, water-soluble vitamins, hormones), and 1.5% inorganic solutes (sodium, chloride, phosphate, sulfate, magnesium, …
What is dialysis and when is it needed?
Answer
Dialysis (hemodialysis) is an artificial method of filtering blood using a dialysis machine when kidneys fail completely. It's needed when both kidneys are damaged and cannot remove waste products, le…
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