Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
The primary role of Henle's loop (HL) in the kidney is to:
The NCERT text states: 'HL primarily helps to maintain osmolar gradient (300 mOsmolL$^{–1}$-1200 mOsmolL$^{–1}$) within the kidney interstitium.'
Which part of the renal tubule is characterized by simple cuboidal brush border epithelium, increasing the surface area for reabsorption?
As per NCERT: 'Proximal Convoluted Tubule (PCT): PCT is lined by simple cuboidal brush border epithelium which increases the surface area for reabsorption.'
The process where tubular cells secrete substances like H$^+$, K$^+$, and ammonia into the filtrate is known as:
The NCERT text states: 'During urine formation, the tubular cells secrete substances like H$^+$, K$^+$ and ammonia into the filtrate. Tubular secretion is also an important step in urine formation...'
The afferent arteriole forms a tuft of capillaries called the:
The NCERT text says: 'Glomerulus is a tuft of capillaries formed by the afferent arteriole – a fine branch of renal artery.'
The urine released per day is approximately 1.5 litres, while the filtrate formed per day is 180 litres. This suggests that nearly what percentage of the filtrate is reabsorbed?
The NCERT text explicitly states: 'A comparison of the volume of the filtrate formed per day (180 litres per day) with that of the urine released (1.5 litres), suggest that nearly 99 per cent of the filtrate has to be reabsorbed by the renal tubules.'
How do DCT and collecting duct contribute to osmoregulation?
According to the NCERT text: 'DCT and collecting duct allow extensive reabsorption of water and certain electrolytes, which help in osmoregulation...'
The collecting duct contributes to the medullary interstitium's osmolarity by allowing passage of small amounts of:
The NCERT text states: 'This segment [collecting duct] allows passage of small amounts of urea into the medullary interstitium to keep up the osmolarity.'
Which of the following is NOT secreted into the filtrate by the renal tubules to maintain ionic balance and pH of body fluids?
The NCERT text mentions: 'H$^+$, K$^+$ and NH$_3$ could be secreted into the filtrate by the tubules to maintain the ionic balance and pH of body fluids.' Glucose is reabsorbed, not secreted, in healthy individuals.
Which of the following is true regarding filtration in the glomerulus?
The NCERT text states: 'Filtration is a non-selective process performed by the glomerulus using the glomerular capillary blood pressure.' It forms 125 ml of filtrate per minute, not urine, and plasma proteins are generally not filtered.
Which of the following factors is NOT considered a probable reason for the alarming growth rate of the Indian population as per the provided text?
The text states: 'A rapid decline in death rate, maternal mortality rate (MMR) and infant mortality rate (IMR) as well as an increase in number of people in reproducible age are probable reasons for this.' An increased maternal mortality rate would generally lead to a decrease, not an increase, in population growth.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every Zoology question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.