Homeostatis Class 12 MCQ: Class 12 Biology MCQ Questions and Answer. Students get here all Important MCQ on Homeostatis Class 12.
Homeostatis Class 12 MCQ with Answers:
(1) The mechanism which eliminates nitrogenous Waste is referred as-
(a) Homeostasis
(b) Osmoregulation
(c) Excretion
(d) thermoregulation
Ans: (c) Excretion
(2) What factor disturbs the homeostasis?
(a) Social environment
(b) Internal environment
(c) External environment
(d) All of the above
Ans: (d) All of the above
(3) What is controlled condition
(a) In receives the input
(b) Disruptions Caused in homeostasis
(c) Variable which is monitored
(d) receives output
Ans: (c) Variable which is monitored
(4) The condition of Equilibrium in the body is known as?
(a) Hemostasis
(b) homeostasis
(c) translation
(d) transcription
Ans: (b) homeostasis
(5) What factors comes under social environment which disturb homeostasis
(a) temp
(b) lack of 02
(c) blood glucose level
(d) none of the above
Ans: (d) none of the above
(6) The more concentrated external environment is termed as
(a) isotonic
(b) Hyotonic
(c) Hypertonic
(d) No of the above
Ans: (c) Hypertonic
(7) Which adaptations for reduced rate of transpiration?
(a) Hydrophytes
(b) Mesophytes
(c) Xerophytes
(d) Osmoregulation
Ans: (c) Xerophytes
(8) ____ have moderate water availability
(a) Hydrophytes
(b) Homeostasis
(c) Xerophytes
(d) Mesophytes
Ans: (d) Mesophytes
(9) Which type of adaptation the surface area of leaves is very lage to transpire water excessive
(a) Xerophytes
(b) mesophytes
(c) Hydrophytes
(d) No of above
Ans: (c) Hydrophytes
(10) In Paramoecium, Osmoregulation is a function of
(a) Cytostome
(b) Contractile Vacuole
(c) Cytopyge
(d) Trichocysts
Ans: (b) Contractile Vacuole
(11) Osmoregulator’s carry out excretion of salt through
(a) gills
(b) fins
(c) Scales
(d) bladder
Ans: (a) gills
(12) Without restoration, if excess water passes out from the tissues of kidney, the cells would
(a) Shrivel & die
(b) burst open & die
(c) not get affected at all
(d) take water from plasma
Ans: (c) not get affected at all
(13) This is used as an osmolytes in humans to increase medullary interstitial osmolality during concentration of urine
(a) Urea
(b) TMAO
(c) a & b both
(d) Uric acid
Ans: (a) Urea
(14) A person on a long hunger strike, Surviviry only on water will have
(a) less amino acids in his urine
(b) more sodium in his urine
(c) less urea in his urine
(d) more glucose in his blood
Ans: (c) less urea in his urine
(15) Mechanism of regulation, typically between entities & it’s environment of solutes & the loss & gain of water is known as
(a) Homeostatis
(b) Thermoregulation
(c) Homostasis
(d) Osmoregulation
Ans: (d) Osmoregulation
(16) Most of the marine invertebrates are
(a) Osmoregulator’s
(b) Osmocon formers
(c) both depends on sea water concentrate
(d) None of above
Ans: (b) Osmocon formers
(17) Kidney matrix retains some quantity of urea to maintain
(a) metabolism
(b) Micturition
(c) desired Osmolarity
(d) balance of the body
Ans: (c) desired Osmolarity
(18) This is not a Primary function of Protonephridia
(a) excretion
(b) Osmoregulation
(c) fluid volume regulation
(d) ionic volume regulation
Ans: (a) excretion
(19) This is both osmoregulator & a nitrogenous product
(a) Uric acid
(b) Urea
(c) NH3
(d) All of the above
Ans: (b) Urea
(20) Homeostasis is best described by which of the following statements?
(a) Maintaining a stable & unaltered state of the body
(b) Stable equilibrium
(c) Keeping the internal environment to meet the body’s near constant
(d) Changing the external environment to meet the body requirements
Ans: (a) Maintaining a stable & unaltered state of the body
(21) What are the two types of Osmoregulation are
(a) Osmonconformers
(b) Osmoregulators
(c) both (a) & (b)
(d) None of above
Ans: (c) both (a) & (b)
(22) Which Organ help to Osmoregulation
(a) Kidney
(b) Lungs
(c) Liver
(d) None of above
Ans: (a) Kidney
(23) Removal of metabolic waste in the form of urea is called
(a) Ureotelism
(b) Uricotelism
(c) Aminotelism
(d) Ammonitelism
Ans: (a) Ureotelism
(24) The means which is used by fresh water organisms to prevent net water gain or loss of body salt is
(a) Lonoytes
(b) Contractile Vacuole
(c) Large volume of dilute urire
(d) All of these
Ans: (d) All of these
(25) The Smallest functional unit of kidney is
(a) Bowman’s capsule
(b) Collective tube
(c) Nephron
(d) Glomerulus
Ans: (c) Nephron
(26) Which one of the following produced in the kidney
(a) Uricase
(b) Arginase
(c) Rennin
(d) Renin
Ans: (d) Renin
(27) fresh water fish maintain Osmoregulation by
(a) Taking both – water & salt from the environment
(b) Continuously tacking in water & elimination excess of salt
(c) Eliminating excess of water & taking up salts from the environment
(d) Eliminating both salt & water into environment
Ans: (c) Eliminating excess of water & taking up salts from the environment
(28) The metabolic path way’s involved in the production of urea are termed as
(a) excretion
(b) Citrulline
(c) Urea cycle
(d) None of above
Ans: (c) Urea cycle
(29) The ornithine cycle removes two waste products from the blood in liver these products are
(a) Co2 & ammonia
(b) Ammonia & Urea
(c) Co2 & Urea
(d) Ammonia & Uric acid
Ans: (a) Co2 & ammonia
(30) In ureotelic animals, urea is formed by
(a) Krebs cycle
(b) EM path way
(c) Ornithin cycle
(d) Covi’s cycle
Ans: (c) Ornithin cycle
(31) A condition of failure of kidney to form urine is called
(a) Anuria
(b) Deamination
(c) Uremia
(d) none of these
Ans: (a) Anuria
(32) The basic functional unit of human kidney is
(a) Neptridia
(b) Henle’s loop
(c) nephron
(d) Pyramid
Ans: (c) nephron
(33) Conversion of ammonia to urea is done by
(a) Ornithine Cycle
(b) arginine Cycle
(c) fumeric Cycle
(d) Citrullire Cycle
Ans: (a) Ornithine Cycle
(34) Animals exacting ammonia are called as
(a) Uricotelic
(b) ammonotelic
(c) ureotelic
(d) Protonephridium
Ans: (b) ammonotelic
(35) Animals ecreating urea & uric acid are called as ____ & ___ respectively
(a) Ureotelic & uricotelic
(b) ammonia & ammontelic
(c) both (a) & (b)
(d) None of these
Ans: (a) Ureotelic & uricotelic
(36) Which is does not have specialized excretory structure in it wast products simply diffuse into isocratic Surrounding
(a) Protone phridium
(b) Hydra
(c) flam cell
(d) Planaria
Ans: (b) Hydra
(37) Earth warm is a
(a) terrestrial vertebrate
(b) aquatic vertebrate
(c) aquatic invertebrate
(d) terrestrial invertebrate
Ans: (d) terrestrial invertebrate
(38) Which of the following statements about earth warm is true?
(a) They are vertebrate
(b) They do not live in burrows
(c) They can be traced by fe cal deposites
(d) They inhibits the lower layers of the soil
Ans: (c) They can be traced by fe cal deposites
(39) Which of the following statements is true about Prostomium?
(a) It is present in the posterior end of the earthworm
(b) It acts as a wedge to open cracks in the soil
(c) It is the mouth of the earth warm
(d) It does not have a wedge to open cracks in the soil
Ans: (b) It acts as a wedge to open cracks in the soil
(40) The first body segment of the earth warm is the
(a) Male genital aperture
(b) Female genital aperture
(c) Peristomium
(d) Clitellum
Ans: (c) Peristomium
(41) What are the pores present on the surface of the body of the earth warm called?
(a) Polypore
(b) Exospore
(c) Nephridiopore
(d) Zoospore
Ans: (c) Nephridiopore
(42) The tubular system opens to the exterior through several
(a) Nephridiopore
(b) nephrostome
(c) Protonephiridium
(d) Protophrostome
Ans: (a) Nephridiopore
(43) The suspended tubular structure which collect excretory products from hemo lymph are called
(a) Protone Phiridium
(b) Metane phiridium
(c) Metane phiridium
(d) Malpighion tubules
Ans: (d) malpighion tubules
(44) The network of closed tubules without internal opening are called?
(a) Protone Phiridium
(b) metanephiridium
(c) malpighion tubules
(d) exoluticus tubules
Ans: (a) Protone Phiridium
(45) In insects, there is no structural or functional relationship between excretory or digestive system expect in
(a) earth warm
(b) Cockroach
(c) Lizards
(d) ants
Ans: (b) Cockroach
(46) Which of the following is not accumulated by the body of living organisms?
(a) Ammonia
(b) Carbon dioxide
(c) Urea
(d) Oxygen
Ans: (d) Oxygen
(47) Which of the following the most toxic form of nitrogenous waste
(a) Guanine
(b) Ammonia
(c) Urea
(d) Uric acid
Ans: (b) Ammonia
(48) Which of the following organisms is not ureotellic
(a) Bony fishes
(b) mammals
(c) Terrestrial amphians
(d) mavine fishes
Ans: (a) Bony fishes
(49) Which of the following is not a uricotellic organism
(a) mammals
(b) Reptiles
(c) Birds
(d) Land Snails
Ans: (a) mammals
(50) The homeostatic thermostatic which facilitates the process of thermoregulation in man is present in
(a) Cereburm
(b) thalamus
(c) hypothalamus
(d) medulla
Ans: (c) hypothalamus
(51) The animal which uses saliva & urire for cooling is
(a) lizard
(b) cats
(c) bears
(d) bats
Ans: (d) bats
(52) The heat transfer mechanism that occurs between the sun & the outer layer of the skin is called what?
(a) Conduction
(b) convection
(c) Radiation
(d) Evaporation
Ans: (c) Radiation
(53) What is the major heat source to retain body temperature or a nude 65 kg about person in 09°C/84.2°F environment
(a) Brain
(b) Brown adipose
(c) Liver
(d) Skeletal muscle
Ans: (d) Skeletal muscle
(54) Which of the following is a human thermoregulatory response controlled by cholinergic sympathetics
(a) Brown adipose tissue thermogenesis
(b) Hand Vasomotion
(c) Shivering thermogenesis
(d) Sweat secretion
Ans: (d) Sweat secretion
(55) The principle physical mechanism that accounts for the transfer of heat within the body up what
(a) Conduction
(b) Convection
(c) Radiation
(d) Evaporation
Ans: (b) Convection
(56) The rate of heat production is increased by increased muscle contraction by movements or Shivering so called as
(a) Thermoregulation
(b) Shivering thermogenesis
(c) non shivering thermogenesis
(d) none of the above
Ans: (b) Shivering thermogenesis
(57) The compensation techniques uses
(a) transformers
(b) inductors
(c) diodes
(d) Capacitor’s
Ans: (c) diodes
(58) Which of the following has a negative temperature coefficient or resistance
(a) Thermistor
(b) Capacitor
(c) Sensistor
(d) diode
Ans: (a) Thermistor
(59) Which type of temperature dependent resistor exhibits a positive temperature coefficient of resistivity?
(a) Thermistor
(b) Sensistor
(c) Varistor
(d) Photoresistor
Ans: (b) Sensistor
(60) Which of the following is not a progeny test
(a) LAL test
(b) Rabbit test
(c) Sham test
(d) All of the above
Ans: (c) Sham test
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