CBSE Class 11 Biology Excretory Products and Their Elimination MCQs

Question : Proximal and distal convoluted tubules are parts of

a) Nephron

b) Oviduct

c) Vas deferens

d) Seminiferous tubules

Answer : Nephron

Question : Antidiuretic hormone

a) All the above

b) Is secreted by nerve cells with their cell bodies in hypothalamus

c) Increases permeability of renal collecting duct cells to water

d) Secretion is determined by plasma osmolarity

Answer : All the above

Question : Which one of the following is correctly matched pair of the given secretion and its primary role in human physiology?

a) Sweat — Thermoregulation

b) Saliva — Tasting food

c) Tears — Excretion of salts

d) Sebum — Sexual attraction

Answer : Sweat — Thermoregulation

Question : A person who is one along hunger strike and is surviving only on water, will have

a) less urea in his urine

b) more sodium in his urine

c) more glucose in his blood

d) less amino acids in his urine

Answer : less urea in his urine

Question : Uricotelism is found in

a) Birds, reptiles and insects

b) Fishes and fresh water protozoans

c) Mammals and birds

d) Frogs and toads

Answer : Birds, reptiles and insects

Question : If Henle’s loop were absent from mammalian nephron which of the following is to be expected?

a) The urine will be more dilute

b) The urine will be more concentrated

c) There will be no urine formation

d) None of these

Answer : The urine will be more dilute

Question :  The basic functional unit of the human kidney is

a) nephron

b) pyramid

c) nephridia

d) Henle’s loop

Answer : nephron

Question : Reabsorption of water in distal parts of kidney tubules/urine formation is controlled by

a) vasopressin

b) calcitonin

c) relaxin

d) oxytocin

Answer : vasopressin

Question : In mammals, the urinary bladder opens into

a) Urethra

b) Uterus

c) Vestibule

d) Ureter

Answer : Urethra

Question : Urea from the blood can be removed by

a) Dialysis

b) Uremia

c) Diuresis

d) Micturition

Answer : Dialysis

Question : Which of the following components of blood does not enter into the nephron?

a) plasma protein

b) water

c) urea

d) glucose

Answer : plasma protein

Question : The condition of excess urea in blood is known as

a) Uraemia

b) Polyuria

c) Haematuria

d) None of these

Answer : Uraemia

Question : Atrial natriuretic factor (ANF) is released in response to the increase in blood volume and blood pressure. Which of thefollowing is not the function of ANF?

a) Stimulates aldosterone secretion

b) Inhibits the release of renin from JGA

c) Stimulates salt loss in urine

d) Inhibits sodium reabsorption from collecting duct

Answer : Stimulates aldosterone secretion

Question : Reabsorption of chloride ions from glomerular filtrate in kidney tubule occurs by

a) Diffusion

b) Brownian movement

c) Osmosis

d) Active transport

Answer : Diffusion

Question : Metanephric kidneys are found in

a) All of these

b) Birds only

c) Reptiles only

d) mammals only

Answer : All of these

Question : In Prawn, excretion is carried out by

a) Green glands

b) Malpighian tubules

c) Nephrons

d) Flame cells

Answer : Green glands

Question : By definition, an ectotherm

a) obtains most of its heat from its environment.

b) derives most of its heat from its own metabolism

c) is warm-blooded

d) is cold-blooded

Answer : obtains most of its heat from its environment.

Question : Which region of the kidney nephron is the main site of amino acid reabsorption?

a) proximal convoluted tubule

b) distal convoluted tubule

c) Bowman’s capsule

d) glomerulus

Answer : proximal convoluted tubule

Question : The sole mechanism for water reabsorption by the renal tubules is

a) osmosis.

b) active tansport

c) cotransport with sodium ions

d) cotransport with bicarbonate ions

Answer : osmosis.

Question : The appearance of albumin in the urine is most likely due to

a) Damage to the Malpighian corpuscles

b) Decrease in the blood osmotic corpuscles

c) Increase in the blood pressure

d) Damage to the proximal convoluted tubules

Answer : Damage to the Malpighian corpuscles