11th Standard Syllabus & Materials

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11th Standard Zoology - Excretion Book Back Questions

Published on: 12/09/2019

Zoology - Excretion

Download Tamil Nadu 11th Standard Biology question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.

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Std: 11th Standard - Biology

chapter: - Model Question paper

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Questions:

Generic 2

7 x 2 = 14

Name the three main hormones that are involved in the regulation of the renal function?

Differentiate cortical from medullary nephrons

How is urea formed in the human body?

Differentiate protonephridia from metanephridia

What is the function of antidiuretic hormone? Where is it produced and what stimuli increases or decreases its secretion?

What solute is normally present in the body to estimate GFR in humans?

What forces promote glomerular filtration? What forces opposes them? What is meant by net filtration pressure?

Multiple Choice Question

4 x 1 = 4

Malpighian tubules remove excretory products from _____.

(a)

mouth

(b)

oesophagus

(c)

haemolymph

(d)

alimentary canal

Kidney stones are produced due to deposition of uric acid and ______.

(a)

Silicates

(b)

Minerals

(c)

Calcium carbonate

(d)

Calcium oxalate

10.

The end product of Ornithine cycle is _____.

(a)

carbon dioxide

(b)

uric acid

(c)

urea

(d)

ammonia

11.

Concentration of urine depends upon which part of the nephron ______.

(a)

Bowman's capsule

(b)

Length of Henle's loop

(c)

P.C.T.

(d)

Network of capillaries arising from glomerulus

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Answers Key:

Generic 2

7 x 2 = 14

Renin, aldosterone and ADH.

Cortical nephrons	Medullary nephrons
Bowman's capsule malpighian capsule is present.	Tubular part of nephrons is present.
Glomerular filtration occurs.	Absorption, re-absorption and secretion occurs.

The nitrogenous waste formed as a result of breakdown of amino acids is converted to urea in the liver by the Ornithine cycle or urea cycle

S.N	Protonephridia	Metanephridia
1.	Primitive	Advanced
2.	Commonly found in primitive chordates (aquatic).	Commonly found in advanced terrestrial animals.
3.	NH₃ is the excretory product.	NH₃ or urea may be the excretory product.
4.	Originated /derived from invertebrates.	Originated/ derived from primitive chordates.

ADH promotes the absorption re-absorption and secretion occurs in nephrons of Kidneys.

All the blood plasma components without corpuscles.

1. Hydrostatic/Hydrostatic / Colloidal osmotic pressure maintains ultrafiltration of glomerulus.
2. The Efferent arteriole pressure opposes them.
3. Net filtration pressure = 55 mmHg - 30 mmHg + 15 mmHg = 10mmHg.

Multiple Choice Question

4 x 1 = 4