Zoology NEET Questions — Free MCQ Practice

Zoology MCQs for NEET — Practice Questions with Answers

Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.

● ● ● ● ●

Which one of the following is correct regarding the excretion?

Large amount of water from renal filtrate is reabsorbed in DCT and a less amount is reabsorbed by PCT.

The descending limb of loop of Henle is completely impermeable to salts.

Malpighian corpuscle is found in medulla region of kidney

The colour of urine is pale yellow and is slightly alkaline in nature.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(b) In descending limb of loop of Henle, the water is reabsorbed from filtrate flowing in it due to increasing osmolarity of interstitial fluid. Sodium and other solutes are not reabsorbed here. The filtrate becomes hypertonic to blood plasma. All nephrons have their renal Malpighian corpuscles in the cortex. Cortical nephrons have their loop of Henle in the renal medulla near its junction with the renal cortex, while the loop of Henle of juxtamedullary nephrons is located deep in the renal medulla; they are called juxtamedullary because their renal corpuscle is located near the medulla (but still in the cortex).

● ● ● ● ●

Which of the following is true for excretion in humans?

Glucose and amino acids are reabsorbed in PCT by simple diffusion.

DCT is impermeable to water.

On an average, 25-30 gm of urea is excreted out per day.

Maximum reabsorption occurs in the loop of Henle.

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(c) Glucose and amino acids are reabsorbed in PCT by secondary active transport. Water, sodium and chloride ions are reabsorbed in DCT. It is permeable to water. Maximum reabsorption takes place within the PCT. Humans are ureotelic and excrete out 25-30 gm of urea per day.

● ● ● ● ●

Which part of the nephrons is impermeable to water?

Proximal convoluted tubule

Distal convoluted tubule

Ascending limb of loop of Henle

Descending limb of loop of Henle

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(c) : Ascending limb of loop of Henle is impermeable to water. It does not reabsorb water rather sodium, potessium, magnesium and chloride are reabsorbed and therefore the filtrate becomes hypotonic to blood plasma.

● ● ● ● ●

Which of the following process of urine formation takes place all along the renal tubule and collecting duct?

Ultrafiltration and tubular reabsorption

Ultrafiltration and tubular secretion

Tubular reabsorption and secretion

Anti-current mechanism and reabsorption

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

(c) Tubular reabsorption and tubular secretion takes place all along the renal tubule and collecting duct while ultrafiltration takes place in renal corpuscle. Anti-current mechanism helps in concentration of urine.

● ● ● ● ●

Hypothalamus is stimulated by osmoreceptors and make the neurohypophysis to release

A. ADH B. Vasopressin C. Both A or B D. Oxytocin

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

● ● ● ● ●

ADH has no effects over

A. Latter parts of tubules B. Kidney C. Blood vessels D. Liver

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

● ● ● ● ●

ADH cannot cause

A. Blood pressure increase B. Glomerular Blood Flow increase C. Increase in GFR D. Loosening of Glomerular capillary

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

● ● ● ● ●

Which of the following is a powerful vasoconstrictor?

A. Angiotensinogen B. Angiotensin I C. Angiotensin II D. Rennin

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

● ● ● ● ●

Angiotensin II has effects over

A. Adrenal medulla B. Adrenal cortex C. Blood vessels D. Both B and C

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

● ● ● ● ●

Aldosterone causes reabsoption of

A. Na+ B. Water C. Na+ and water D. Na+, urea, water

You've reached today's free limit of 20 questions. Log in to keep practising for free.

Explanation

NCERT page number 297

19.5 Regulation of Kidney Function

Excretory Products And Their Elimination

Ready to ace NEET?

Free access · No credit card required

Browse All Questions Create Free Account

Frequently Asked Questions

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.