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1.

Part of nephron impermeable to salt isA. descending limb of loop of HenleB. ascending limb of loop of HenleC. Distal convoluted tubuleD. collecting ducts

Answer» Correct Answer - C
2.

Part of nephron impermeable to salt isA. Proximal convoluted tubule B. distal convoluted tubuleC. Ascending limb of loop of HenleD. descending limb of loop of henle

Answer» Correct Answer - C
Loop of Henle is connected with excretory system.
3.

Which part of nephron is impermeable to waterA. collecting tubleB. ascending limb of Henle loopC. distal convoluted tubuleD. descending limb of Henle loop

Answer» Correct Answer - B
4.

Select the incorrect statement regarding mechanism of urine formation in man.A. Tubular secretion takes place in the PCT alsoB. Aldosterone induces greater reabsorption of sodiumC. The counter current systems contrivute in diluting the urineD. The glomerular filtration rate is about 125 mL per minute

Answer» Correct Answer - D
5.

Part of nephron impermeable to salt isA. Proximal convoluted tubuleB. Distal convoluted tubleC. Descending limb of loop of HenleD. Ascending limb of loop of Henle

Answer» Correct Answer - C
6.

A portion of uric acid is changed into urea and ammonia by intestinalA. UrogenolysisB. UreolysisC. UricolysisD. Ureotolysis

Answer» Correct Answer - C
7.

There are three organisms A, B, C. A has to excrete Urea B has to excrete Uric acid C has to excrete Ammonia Which out of these 3 organisms will have the maximum urine output?A. C will produce more urine than BB. B will produce more urine than CC. B will produce more urine than AD. C will produce less urine than A

Answer» Correct Answer - A
8.

Find the correct match of site and function of nephronA. `{:("SITE","FUNCTION"),("DCT","Reabsorption of "Na^(+)" and "K^(+)" from filtrate"):}`B. `{:("SITE","FUNCTION"),("Descending of loop of Henle","Impermeable to water"):}`C. `{:("SITE","FUNCTION"),("PCT",HCO_(3)^(-)" absorption of filtrate"):}`D. `{:("SITE","FUNCTION"),("DCT","Massive reabsorption of "H_(2)O" & "H^(+)","K^(+)" ions"):}`

Answer» Correct Answer - B
9.

Vasopressin stimulates reabsorption of water and reduction of urine secretion. Hence vasopressin is otherwise calledA. Synovial fluidB. NeurotransmitterC. Antidiuretic hormoneD. Growth regulating substance

Answer» Correct Answer - C
10.

Liver secretes bile containing substances like bilirubin, biliverdin, cholesterol, degraded steroid hormones, vitamins and drugs. Most of these substances ultimately pass out along with A. Urine B. Digestive wastes C. SweatingD. Secretion of sebum

Answer» Correct Answer - B
Liver secretes bile-containing substances like bilirubin, biiiverdin, cholesterol, degraded steroid hormones, vitamins and drugs. Most of these substances ultimately pass out alongwith digestive wastes.Â
11.

Volume of urine is regulated byA. AldosteroneB. Aldosterone, ADH and testosteroneC. Aldosterone and ADHD. ADH alone

Answer» Correct Answer - C
( c) water is reabsorbed in DCT under the influence of ADH secreted by posterior lobe of blood plasma and aldosterone is associated with the excretion of `K^(+)` and `H^(+)` ions same `Cl^(-)` ions are also reabsorbed.
12.

Volume of urine is regulated byA. aldosteroneB. aldosterone and ADHC. alodsterone, ADH and testosteroneD. ADH

Answer» Correct Answer - B
Volume of urine is regulated by aldosterone and ADH.Â
13.

Glomeruli are confined toA. CortexB. MedullaC. PelvisD. Pyramids

Answer» Correct Answer - A
14.

Which determines the abiltiy of a mammal to concentrate its urineA. Number of nephronsB. Length of proximal convoluted tubulesC. Length of collecting ductsD. Size of gomerulus

Answer» Correct Answer - C
15.

Volume of urine is regulated byA. AldosteroneB. Aldosterone and ADHC. Aldosterone, ADH and testosteroneD. ADH

Answer» Correct Answer - D
16.

Match the colums A. `a-2, b-1, c-3, d-4, e-5`B. `a-3, b-5, c-2, d-1, e-4`C. `a-5, b-3, c-4, d-2, e-1`D. `a-5, b-3, c-2, d-4, e-1`

Answer» Correct Answer - D
17.

Kidney stone is produce due toA. depostition of sand particlesB. precipitation of proteinsC. crystallisation of oxalatesD. blockage of fat

Answer» Correct Answer - C
Kindney stone is produced due to crystallisation of oxalates.
18.

Concentration of urine is controlled byA. ACTHB. MSHC. ADHD. Oxytocin

Answer» Correct Answer - C
19.

Concentration of urine in organisms depends uponA. length of loop of henleB. PCTC. DCTD. intake of water

Answer» Correct Answer - A
20.

A kidney stone isA. Blockage by fatsB. Deposition of sand in kidneyC. A salt such as oxalate crystallised in pelvisD. Blockage by proteins

Answer» Correct Answer - C
(c)Kidney stone is a crystallized chemicals like uric acid, calcium oxalate and calcium phosphate.
21.

A kidney stone isA. depostition of sand particlesB. precipitation of proteinsC. crystallisation of oxalatesD. blockage of fat

Answer» Correct Answer - C
Kindney stone is produced due to crystallisation of oxalates.
22.

Ammonia is excretory material inA. Cartilaginous fishesB. Fresh water/bony fishesC. WhaleD. Camel

Answer» Correct Answer - B
23.

Which one is not present in nephric filtrate ?A. PencillinB. Amino acidC. VitaminsD. None of the above

Answer» Correct Answer - A
24.

Find out the correct labelling A. a- nephron, b-cortex, c-medulla, d-pelvis, e-ureterB. a- cortex, b-nephron, c-pelvis, d- medulla, e- ureterC. a - cortex, b- medulla, c- nephron, d- pelvis, e- ureterD. a - nephron, b- cortex, c- medulla, d - ureter, e- pelvis

Answer» Correct Answer - A
25.

Green glands present in some arthropods help inA. RespirationB. ExcretionC. DigestionD. Reproduction

Answer» Correct Answer - B
26.

The major reabsorption of `Na^(+)` takes place in which part of kidneyA. ascetiding limb of loop of HenleB. descending limb of loop of HenleC. collecting tubuleD. None of the above

Answer» Correct Answer - A
27.

A kidney stone isA. Deposition of sand particlesB. Precipitation of proteinsC. Crystallisation of oxalatesD. Blockage of fat

Answer» Correct Answer - C
28.

Concentration of urine is controlled byA. VasopressinB. AldosteroneC. InsulinD. Adrenaline

Answer» Correct Answer - A
29.

Urine is excreted out of the body throughA. PelvisB. UreterC. Urinary bladderD. Urethra

Answer» Correct Answer - D
30.

Which of the following is excreted in human urine ?A. AmmoniaB. UreaC. uric acidD. amino acid

Answer» Correct Answer - B
31.

Ureotelic animals are those in which the main nitrogenous waster product isA. Amino acidB. UreaC. Uric acidD. Ammonia

Answer» Correct Answer - B
32.

The urine excreted by mammals isA. isotonicB. hypotonicC. hypertonicD. None of those

Answer» Correct Answer - C
33.

Hilum of the kidney leads toA. renal pelvisB. meduliaC. cortexD. adrenal gland

Answer» Correct Answer - A
34.

In living beings ammonia is converted into urea throughA. arginine cycleB. ornithine cycleC. fumarine cycleD. citrulline cycle

Answer» Correct Answer - D
35.

In living beings ammonia is converted into urea throughA. ornithine cycleB. citrulline cycleC. fumarine cycleD. arginine cycle

Answer» Correct Answer - A
Ornithine combines with one molecule of `NH_(3)andCO_(2)` to produce citrulline. Citrulline combines with another molecule of `NH_(3)` to form arginine. Arginnine is broken down into urea and ornithine which repeats the cycle. This is called Ornithine cycle or urea cycle of Krebs-Henseleit cycle.
36.

What do you mean by uricotelism?

Answer» The process of excerting uric acid is known as uricotelism.
37.

In which organ ammonia is converted into urea ?

Answer» Correct Answer - Liver
38.

The part through which arteries and veins enter or leave the kidney is calledA. HilusB. Renal papillaC. Major claycesD. Minor calyces

Answer» Correct Answer - A
39.

The excretory structure of Amphioxus (Cephalochordate) isA. Flame cell/ SolenocyteB. Coxal glandC. Malpighian tubulesD. Green gland

Answer» Correct Answer - A
40.

Name the most toxic nitrogenous waste.

Answer» Correct Answer - Ammoni
41.

Least toxic nitrogenous waste among the following isA. UreaB. Uric acidC. AmmoniaD. More than one option is correct

Answer» Correct Answer - B
42.

Almost all aquatic animals excrete ammonia as nitrogenous waste. Which is wrongA. Ammonia is highly toxic and requires elimination when formedB. Ammonia is easily soluble in waterC. Ammonia is converted into less toxic form called ureaD. Ammonia is released from body in gaseous state

Answer» Correct Answer - C
43.

Birds excrete nitrogenous waste asA. Uric acidB. UreaC. `NH_(3)`D. Guanine

Answer» Correct Answer - A
44.

Almost all aquatic animals excrete ammonia as nitrogenous waste. Which is wrongA. Ammonia is highly toxic and requires elimination as and when formedB. Ammonia is easily soluble in waterC. Ammonia is converted into less toxic form called from called ureaD. Ammonia is resealed from body in gaseous stateÂ

Answer» Correct Answer - D
45.

Most toxic nitrogenous waste material is

Answer» Correct Answer - Ammonia
46.

Least toxic nitrogenous waste among the following isA. UreaB. Uric acidC. Ammonia D. More than one option is correct

Answer» Correct Answer - B
47.

Almost all the aquatic animals excrete ammonia as the nitrogenous waste product. Which of the following statement is not in agreement with this situationA. Ammonia is easily soluble in waterB. Ammonia is released from the body in a gaseous stateC. Ammonia is highly toxic and needs to be eliminated as and when formedD. Ammonia gets converted into a less toxic from called urea

Answer» Correct Answer - B
48.

Which of the following nitrogenous substance is highly toxic or If liver from body is removed then which component of blood increasesA. UreaB. Uric acidC. Amino acidD. Ammonia

Answer» Correct Answer - D
(d)The ammonia is highly toxic because it has high pH, So, it must either be metabolised or expelled immediately out of bady, so its concentration remains low in the blood.
49.

What will happen if the stretch receptors of the urinary bladder wall are totally removedA. There will be no micturition B. Urine will not collect in in bladderC. micturition will continueD. urine will continue to collect normally in bladder

Answer» Correct Answer - A
There will be no micturition if stretch receptors of urianary bladder wall are totally removed.
50.

Maintenance of body potassium level is primarily by tubularA. Absorption in PCTB. Secretion in DCTC. Absorption of DCTD. Secretion in PCT

Answer» Correct Answer - B