class 10 bio chapter 2 mcqs

class 10 bio chapter 2 mcqs

Homeostasis—Class 10 Biology Chapter 2 MCQs

What is homeostasis?
a) Process of growth
b) Maintenance of internal conditions
c) Movement of body parts
d) Digestion of food
Answer: b
Which organ is responsible for filtering blood in humans?
a) Heart
b) Liver
c) Kidney
d) Lung
Answer: c
The functional unit of the kidney is
a) Alveolus
b) Nephron
c) Neuron
d) Glomerulus
Answer: b
Homeostasis is essential for:
a) Energy production
b) Cell survival
c) Movement
d) Respiration
Answer: b
The main excretory product in humans is:
a) Urea
b) Glucose
c) Oxygen
d) Fat
Answer: a
Which part of the nephron is responsible for filtration?
a) Loop of Henle
b) Bowman’s capsule
c) Collecting duct
d) Renal pelvis
Answer: b
Which hormone controls water reabsorption in kidneys?
a) Insulin
b) ADH
c) Glucagon
d) Aldosterone
Answer: b
Which system is directly involved in osmoregulation?
a) Skeletal
b) Respiratory
c) Excretory
d) Circulatory
Answer: c
Which organ in plants helps in water loss?
a) Root
b) Leaf
c) Stem
d) Stomata
Answer: d
Thermoregulation is the control of
a) Water balance
b) Body temperature
c) Blood pressure
d) Growth hormones
Answer: b
Which is not a function of the kidney?
a) Blood filtration
b) Urea production
c) Water balance
d) Oxygen absorption
Answer: d
Excretion in unicellular organisms occurs by:
a) Kidney
b) Contractile vacuole
c) Skin
d) Nephron
Answer: b
What is osmoregulation?
a) Control of oxygen levels
b) Regulation of glucose
c) Balance of water and salts
d) Hormone secretion
Answer: c
What is the outer region of the kidney called?
a) Medulla
b) Cortex
c) Pelvis
d) Glomerulus
Answer: b
Which structure carries urine from kidneys to the bladder?
a) Urethra
b) Loop of Henle
c) Ureter
d) Nephron
Answer: c
Sweat is secreted by:
a) Liver
b) Kidney
c) Sweat glands
d) Salivary glands
Answer: c
Which organ plays a role in detoxifying harmful substances?
a) Kidney
b) Heart
c) Liver
d) Lungs
Answer: c
The main excretory organ in insects is
a) Nephridia
b) Malpighian tubules
c) Skin
d) Gills
Answer: b
A sudden drop in body temperature is called:
a) Hyperthermia
b) Hypothermia
c) Fever
d) Thermogenesis
Answer: b
In humans, urea is formed in the:
a) Kidney
b) Liver
c) Bladder
d) Intestine
Answer: b
Homeostasis is maintained by which system?
a) Circulatory
b) Endocrine
c) Digestive
d) Skeletal
Answer: b
Which structure in the brain regulates temperature?
a) Cerebellum
b) Medulla
c) Hypothalamus
d) Cerebrum
Answer: c
Excretion helps remove:
a) Undigested food
b) Hormones
c) Metabolic waste
d) Blood cells
Answer: c
In humans, urine is stored in the:
a) Ureter
b) Bladder
c) Urethra
d) Kidney
Answer: b
Dialysis is used when:
a) Liver fails
b) Heart fails
c) Kidney fails
d) Brain fails
Answer: c

The tube that carries urine out of the body is
a) Ureter
b) Nephron
c) Urethra
d) Loop of Henle
Answer: c
Which one is an example of a negative feedback mechanism?
a) Sweating during exercise
b) Blood clotting
c) Growth in height
d) Reflex action
Answer: a
Which part of the nephron is involved in reabsorption?
a) Glomerulus
b) Loop of Henle
c) Bowman's capsule
d) Collecting duct
Answer: b
The fluid filtered from blood in the glomerulus is called:
a) Plasma
b) Urine
c) Filtrate
d) Lymph
Answer: c
Urine is made up of
a) Urea, salts, water
b) Glucose, amino acids, salts
c) Blood, proteins, enzymes
d) Starch, salts, water
Answer: a
Which part of the brain controls kidney function via hormones?
a) Cerebrum
b) Cerebellum
c) Hypothalamus
d) Medulla
Answer: c
The kidney regulates blood.
a) Oxygen
b) Glucose
c) pH and salt
d) Red cells
Answer: c
The process of removal of metabolic wastes is called
a) Ingestion
b) Excretion
c) Digestion
d) Absorption
Answer: b
Which structure collects urine from the nephron?
a) Glomerulus
b) Bowman’s capsule
c) Collecting duct
d) Ureter
Answer: c
Sweating helps regulate:
a) Blood sugar
b) Body temperature
c) Water intake
d) Blood pressure
Answer: b
In plants, excess water is lost mainly by:
a) Absorption
b) Photosynthesis
c) Transpiration
d) Respiration
Answer: c
Which hormone increases reabsorption of water?
a) Insulin
b) ADH
c) Estrogen
d) Glucagon
Answer: b
Malfunctioning kidneys cause:
a) Dehydration
b) Uremia
c) Fever
d) Tuberculosis
Answer: b
Which of the following organs do NOT excrete waste?
a) Kidneys
b) Lungs
c) Liver
d) Stomach
Answer: d
Nephrons are found in:
a) Liver
b) Lungs
c) Kidney
d) Brain
Answer: c
Which organ excretes carbon dioxide?
a) Kidney
b) Skin
c) Lungs
d) Liver
Answer: c
Homeostasis controls:
a) External temperature
b) Internal body balance
c) Blood formation
d) Digestion speed
Answer: b
Thermoregulation prevents:
a) Heart attack
b) Dehydration
c) Overheating
d) Digestion
Answer: c
A rise in body temperature causes:
a) Shivering
b) Sweating
c) Vasoconstriction
d) Insulin release
Answer: b
Vasoconstriction occurs:
a) In hot temperature
b) When hydrated
c) In cold temperature
d) During digestion
Answer: c
Ureters connect:
a) Kidney to urethra
b) Kidney to bladder
c) Bladder to liver
d) Urethra to kidney
Answer: b
Homeostasis in plants includes:
a) Oxygen production
b) Chlorophyll absorption
c) Water balance
d) Glucose digestion
Answer: c
What is the major nitrogenous waste in humans?
a) Uric acid
b) Ammonia
c) Urea
d) Nitrate
Answer: c
ADH is secreted by:
a) Thyroid
b) Adrenal
c) Pituitary
d) Pancreas
Answer: c
Dialysis is an artificial process of:
a) Urine formation
b) Blood filtration
c) Muscle contraction
d) Hormone secretion
Answer: b
Which condition results in loss of water and salts?
a) Constipation
b) Diarrhea
c) Fever
d) Asthma
Answer: b
Liver helps in homeostasis by:
a) Making hormones
b) Breaking down toxins
c) Filtering blood
d) Forming urea
Answer: b
Which organ plays a major role in water regulation?
a) Liver
b) Heart
c) Kidney
d) Pancreas
Answer: c
Hypothalamus responds to:
a) Glucose levels
b) Water levels
c) Internal temperature
d) Food intake
Answer: c
Urea is carried from the liver to the kidney by
a) Nerve cells
b) Veins
c) Blood
d) Lymph
Answer: c
What is the urine-producing structure?
a) Bowman’s capsule
b) Loop of Henle
c) Glomerulus
d) Nephron
Answer: d
Reabsorption of useful materials occurs in:
a) Collecting duct
b) Loop of Henle
c) Bowman’s capsule
d) Glomerulus
Answer: b
The skin regulates:
a) Blood pH
b) Water level only
c) Body temperature
d) Urine production
Answer: c
Plant leaves lose water by:
a) Translocation
b) Photosynthesis
c) Transpiration
d) Germination
Answer: c
Homeostasis is disrupted in:
a) Fever
b) Digestion
c) Excretion
d) Metabolism
Answer: a

What happens during dehydration?
a) Increase in glucose
b) Decrease in water level
c) Increase in red blood cells
d) Increase in blood volume
Answer: b
When body temperature drops, the body responds by:
a) Sweating
b) Vasodilation
c) Shivering
d) Urination
Answer: c
Which one is an example of excretion in plants?
a) Translocation
b) Shedding of leaves
c) Photosynthesis
d) Germination
Answer: b
The urine is finally excreted through the:
a) Ureter
b) Collecting duct
c) Bladder
d) Urethra
Answer: d
Which part of nephron forms filtrate?
a) Glomerulus
b) Loop of Henle
c) Collecting duct
d) Renal artery
Answer: a
The opening through which urine passes out of the body:
a) Ureter
b) Urethra
c) Nephron
d) Bladder
Answer: b
The failure of kidneys may lead to accumulation of:
a) Water
b) Urea
c) Salts
d) Glucose
Answer: b
Kidney stones are formed due to:
a) Hormonal imbalance
b) Excess urea
c) Crystallization of salts
d) Dehydration only
Answer: c
Osmoregulation in humans is mainly regulated by:
a) Lungs
b) Liver
c) Kidneys
d) Intestines
Answer: c
Which plant hormone closes stomata during water shortage?
a) Cytokinin
b) Auxin
c) Gibberellin
d) Abscisic acid (ABA)
Answer: d
Which of the following helps in heat loss from the body?
a) Shivering
b) Vasoconstriction
c) Vasodilation
d) Sweating
Answer: d
Homeostatic imbalance may result in:
a) Healthy state
b) Disease
c) Growth
d) Reproduction
Answer: b
Which organ eliminates bile pigments?
a) Lungs
b) Liver
c) Skin
d) Kidney
Answer: b
Thermoreceptors detect:
a) Blood pressure
b) Temperature changes
c) Water concentration
d) Glucose level
Answer: b
The renal artery carries:
a) Oxygen-poor blood
b) Blood with urea
c) Urine
d) Oxygenated blood with waste
Answer: d
What is the role of liver in homeostasis?
a) Stores water
b) Filters CO₂
c) Converts ammonia to urea
d) Regulates temperature
Answer: c
Filtration of blood occurs in:
a) Renal pelvis
b) Bowman’s capsule
c) Collecting duct
d) Bladder
Answer: b
Excretory products of plants may include:
a) Amino acids
b) Toxins, gums, and resins
c) Enzymes
d) Starch
Answer: b
Which process is passive and does not require energy?
a) Active transport
b) Diffusion
c) Reabsorption
d) Filtration
Answer: b
Increased ADH secretion causes:
a) More urine production
b) Less urine production
c) Dehydration
d) Loss of ions
Answer: b
Homeostasis in aquatic animals is challenging due to:
a) Oxygen levels
b) Water pollution
c) Salt concentration
d) Food availability
Answer: c
Hyperthermia is:
a) Normal body temperature
b) Below-normal temperature
c) Abnormally high temperature
d) Balanced internal heat
Answer: c
Dialysis removes:
a) Blood proteins
b) Urea and excess salts
c) Hormones
d) Enzymes
Answer: b
Loss of skin function may affect:
a) Digestion
b) Excretion and temperature regulation
c) Movement
d) Reproduction
Answer: b
The kidneys are located:
a) In front of the liver
b) Behind the stomach
c) On either side of the spine
d) Inside the lungs
Answer: c
Glucose is reabsorbed in:
a) Collecting duct
b) Bowman’s capsule
c) Proximal tubule
d) Loop of Henle
Answer: c
Homeostasis maintains:
a) Constant environment
b) Energy levels
c) Oxygen flow
d) Genetic structure
Answer: a
Which plant part excretes waste?
a) Root
b) Stem
c) Leaf
d) Bark
Answer: d
Ammonia is the main nitrogenous waste in:
a) Mammals
b) Birds
c) Amphibians and fish
d) Reptiles
Answer: c
The part of nephron where urine becomes concentrated:
a) Loop of Henle
b) Glomerulus
c) Bowman’s capsule
d) Renal artery
Answer: a
The effect of ADH on kidneys is:
a) Increased filtration
b) Decreased reabsorption
c) Increased water reabsorption
d) More urea production
Answer: c
Which gland secretes hormones for homeostasis?
a) Pituitary
b) Adrenal
c) Pancreas
d) All of these
Answer: d
The pigment bilirubin is excreted via:
a) Urine
b) Sweat
c) Bile
d) Breath
Answer: c
Uric acid is the main waste in:
a) Humans
b) Amphibians
c) Birds
d) Fish
Answer: c
Blood enters the glomerulus through:
a) Efferent arteriole
b) Renal vein
c) Afferent arteriole
d) Loop of Henle
Answer: c
The kidney structure collecting urine:
a) Ureter
b) Renal pelvis
c) Glomerulus
d) Cortex
Answer: b
Loop of Henle is mainly involved in:
a) Filtration
b) Secretion
c) Reabsorption
d) Hormone release
Answer: c
An example of a homeostatic mechanism in plants is:
a) Leaf fall in winter
b) Closing stomata under water stress
c) Flowering
d) Root elongation
Answer: b
Which type of feedback opposes change?
a) Positive
b) Negative
c) Forward
d) Reverse
Answer: b
Which waste is removed by lungs?
a) Urea
b) Carbon dioxide
c) Bile pigments
d) Ammonia
Answer: b

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