81 + Interview Questions in Breathing And Exchange Of Gases in Biology

51.	Which one of the following changes takes place during inspiration?(a) Decrease in thoracic cavity(b) Relaxation in diaphragm(c) Relaxation in external intercostal muscles(d) Sternum moves towards ventral and anterior directionThe question was asked in unit test.This interesting question is from Mechanism of Breathing-1 topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Right CHOICE is (d) Sternum moves towards ventral and anterior direction Best explanation: During inspiration, thoracic volume INCREASES. Sternum moves towards ventral and anterior direction, diaphragm contracts, ribs move towards OUTSIDE and ventral side.

Discussion

52.	Inspiration occurs when there is ___________(a) no pressure gradient(b) negative pressure in the lungs(c) positive pressure in the lungs(d) more pressure in lungs than atmosphereThis question was posed to me in an online interview.Query is from Mechanism of Breathing-1 topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» RIGHT OPTION is (b) negative pressure in the lungs Easy explanation: Inspiration can occur if the pressure WITHIN the lungs is LESS than the atmospheric pressure. So, there is a negative pressure in the lungs than the atmospheric pressure.

Discussion

53.	Alveoli is derived from the__________(a) endoderm(b) ectoderm(c) mesoderm(d) ecto-mesodermThe question was posed to me in quiz.I'm obligated to ask this question of Human Respiratory System in division Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct answer is (a) endoderm Explanation: Endoderm is one of the primary germ layers of embryo. It GIVES RISE to epithelium of pharynx including the eustachian TUBE, the tonsils, the thyroid gland, parathyroid glands, and thymus gland; the LARYNX, trachea, and lungs; GIT, the URINARY bladder, the vagina, and urethra. Alveoli is derived from the endoderm of the embryo.

Discussion

54.	Diaphragm increases volume of thoracic cavity in _________(a) dorsal-ventral axis(b) anterior posterior axis(c) lateral regions(d) side waysThis question was addressed to me in quiz.Question is from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (b) anterior posterior axis For EXPLANATION I would say: Radial muscles are PRESENT in diaphgram. By the contraction in these muscles, DIAPHRAGM becomes FLATTENED in shape, so, VOLUME of thoracic cavity increases in anterior posterior axis.

Discussion

55.	Hyaline cartilage is not found in_________(a) thyroid cartilage(b) cricoid cartilage(c) arytenoid cartilage(d) cartilage of santoriniI had been asked this question during an interview for a job.I'm obligated to ask this question of Human Respiratory System topic in section Breathing and Exchange of Gases of Biology – Class 11
Answer» The CORRECT choice is (d) cartilage of santorini To ELABORATE: Hyaline cartilage is glass like and found MAINLY in ribs, NOSE, larynx and trachea. Cartilage of Santorini is made up of elastic cartilage, while thyroid, cricoid, arytenoid cartilages are made up of hyaline cartilage.

Discussion

56.	What is the concentration of oxygen in expired air?(a) 19%(b) 4%(c) 10%(d) 16%This question was posed to me in an online quiz.I need to ask this question from Exchange of Gases in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Right OPTION is (d) 16% The explanation: INSPIRED air contains 19.6% oxygen and expired air has 15.7% oxygen. So approximately 4% oxygen goes to blood from air. In the same way inspired air contains CARBON dioxide 0.04% and expired air has 3.6% carbon dioxide so approximately 3.56% carbon dioxide goes to air from blood.

Discussion

57.	Contraction in diaphgram causes increase in thoracic volume in the _____(a) dorso-ventral axis(b) antero-posterior axis(c) dorso-posterior axis(d) antero-ventral axisI have been asked this question in a job interview.Asked question is from Mechanism of Breathing-2 topic in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (b) antero-posterior axis The best I can explain: At the time of inspiration diaphgram contracts leading to increase in THORACIC VOLUME in the anterior posterior axis. Whereas MOVEMENT of sternum causes INCREMENT in antero-ventral DIRECTION.

Discussion

58.	Air that remains in lungs after most powerful expiration is _______(a) inspiratory air(b) residual air(c) dead space air(d) tidal airThis question was addressed to me by my college director while I was bunking the class.My doubt stems from Mechanism of Breathing-2 topic in section Breathing and Exchange of Gases of Biology – Class 11
Answer» The correct choice is (b) residual air The explanation is: Residual air is the VOLUME of air remaining in the lungs even after most forceful expiration. It cannot be expelled out of the lungs. Its value on an average in adult MAN is approximately 1200 ML.

Discussion

59.	Which of the following part is known as the soundbox of our body system?(a) Vocal gland(b) Pharynx(c) Larynx(d) NasopharynxThis question was addressed to me in examination.This is a very interesting question from Human Respiratory System topic in section Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (C) Larynx To EXPLAIN: Larynx is known as the soundbox of our body system. It is made of cartilage and HELPS in production of sound, hence the name soundbox. The larynx is guarded by epiglottis. Also, larynx helps in REGULATION of our pitch and volume.

Discussion

60.	________ prevents the food from entering into the glottis during swallowing.(a) Larynx(b) Peri glottis(c) Post glottis(d) EpiglottisThis question was addressed to me by my school principal while I was bunking the class.I want to ask this question from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» The correct choice is (d) EPIGLOTTIS Easy explanation: Epiglottis prevents the FOOD from entering into glottis during swallowing. It is a THIN ELASTIC cartilaginous flap. And if the food enters into the glottis, then it can lead to severe coughing or CHOKING.

Discussion

61.	Aquatic arthropods and mollusks use which organ for respiration?(a) Lungs(b) Gills(c) Eyes(d) NoseThis question was addressed to me during an interview.My doubt is from Respiration in Animals in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» Right choice is (b) Gills The explanation is: Since aquatic arthropods and mollusks are mainly in WATER, they USE gills for respiration. These gills are present as outgrowths to their skin, which is covered by the EXOSKELETON. The exchange of GASES TAKES place through these gills.

Discussion

62.	The signal for voluntary muscle for forced breathing starts in ______(a) medulla(b) cerebrum(c) pons(d) cerebellumThis question was addressed to me during an internship interview.Enquiry is from Mechanism of Breathing-2 topic in division Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (b) CEREBRUM Best EXPLANATION: The signal for voluntary muscle for FORCED breathing STARTS in cerebrum. Cerebrum is the control center of all the voluntary actions of the body. In forceful inspiration or EXPIRATION, signals are generated through this.

Discussion

63.	Dead space air is _______(a) 150 CC(b) 350 CC(c) 500 CC(d) 1500 CCThis question was posed to me in an online interview.This question is from Mechanism of Breathing-2 topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» The CORRECT choice is (a) 150 CC The BEST I can explain: Dead space air is 150 CC. Dead space air represents the VOLUME of air that does not participate in the gaseous EXCHANGE and remains in the lungs. It can’t be expired or inspired or altered.

Discussion

64.	Strength of inspiration and expiration can be increased with the help of_______(a) abdominal muscles(b) external intercoastal muscle(c) diaphragm(d) internal intercoastal muscleThis question was posed to me during an internship interview.My doubt is from Mechanism of Breathing-2 in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct option is (a) ABDOMINAL muscles The best explanation: Abdominal muscles can increase the strength of inspiration and expiration. This type of breathing is ALSO known as FORCEFUL breathing and can be FOUND in pregnant women.

Discussion

65.	Which muscles can help in increasing the strength of breathing?(a) Arm muscle(b) Chest muscles(c) Abdominal muscles(d) Facial muscleThis question was addressed to me in an online interview.I need to ask this question from Mechanism of Breathing-1 topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct ANSWER is (C) Abdominal muscles To explain I would say: We have the ability to increase the strength of inspiration and EXPIRATION with the help of additional muscles called abdominal muscles. This is called as FORCEFUL BREATHING.

Discussion

66.	Where are Bowman’s glands found?(a) Olfactory epithelium(b) Cortical nephrons(c) Juxtamedullary nephrons(d) Anterior pitutaryI had been asked this question in a national level competition.I want to ask this question from Human Respiratory System in division Breathing and Exchange of Gases of Biology – Class 11
Answer» RIGHT option is (a) Olfactory epithelium The best explanation: Olfactory REGION of nassal passage is lined by nuero sensory epithelium known as ‘Olfactory epithelium or Schneidarian membrane’. They secrete chemoreceptive SUBSTANCES which help in SENSING SMELL.

Discussion

67.	Carbon dioxide is harmful to the body.(a) True(b) FalseThe question was asked during an interview.This is a very interesting question from Respiration in Animals in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» CORRECT answer is (a) True For EXPLANATION I WOULD say: True statement. Carbon DIOXIDE is a by-product in our body which is harmful to beings. It has to be removed systematically, which is carried out through respiration.

Discussion

68.	Human lungs are made up of _____(a) 2 right lobes and 3 left lobes(b) 2 right lobes and 3 left lobes(c) 3 right lobes and 2 left lobes(d) 3 right lobes and 3 left lobesI have been asked this question in an internship interview.Question is from Human Respiratory System topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Right answer is (C) 3 right LOBES and 2 left lobes Best explanation: Human LUNGS are made up of 3 right lobes and 2 left lobes. Right lung includes right anterior lobe, MIDDLE lobe, right posterior lobe. Left lung is made up of left anterior and left posterior lobe.

Discussion

69.	Tracheal tubes are present for which type of organisms?(a) Birds(b) Worms(c) Frogs(d) InsectsThis question was addressed to me in exam.My question is from Respiration in Animals in division Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (d) Insects For explanation I would say: Insects respire using an organ called trachea. SEVERAL tubes are present for trachea that is UNIFORMLY DISTRIBUTED inside the body of the organism. The trachea divides into tracheoles through which the OXYGEN is supplied to the body parts.

Discussion

70.	The respiration mechanism of an organism mainly depends on which of the following?(a) Survival instincts(b) Habitats(c) Levels of situation(d) HabitsI have been asked this question in semester exam.The doubt is from Respiration in Animals in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Right option is (b) Habitats Best EXPLANATION: The mechanism of an organism mainly depends on two things. It is their HABITAT and level of organization. Small ANIMALS have less complex mechanisms, whereas higher ORGANISMS have more complex mechanism for respiration. It ALSO depends on where they live.

Discussion

71.	Where is the respiratory rhythm center is located?(a) Medulla region(b) Aortic arch(c) Pons region(d) Carotid arteryI had been asked this question in unit test.Origin of the question is Mechanism of Breathing-2 in section Breathing and Exchange of Gases of Biology – Class 11
Answer» The correct OPTION is (a) Medulla region Explanation: The respiratory rhythm center in the Medulla is primarily responsible for the regulation. Dorsal respiratory GROUP(DRG) GENERATE the basic respiratory rhythm WHEREAS the ventral respiratory(VRG) which remains inactive during normal respiration.

Discussion

72.	On which of the following factors diffusion does not depend?(a) Solubility of gases(b) Thickness of the respiratory membrane(c) Partial pressure difference(d) Molecular weight of gasesThe question was asked during an interview for a job.This question is from Exchange of Gases topic in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Right answer is (d) Molecular WEIGHT of gases Easy EXPLANATION: Diffusing capacity depends on solubility of gases, thickness of the respiratory MEMBRANE, partial pressure difference. These all factors play an important role in the EXCHANGE of gases through the process of SIMPLE diffusion.

Discussion

73.	A fish which is taken and brought to land dies within a few minutes because of _____(a) global warming(b) high temperature(c) pressure absence(d) inability to respireI got this question in my homework.My doubt is from Respiration in Animals in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct option is (d) inability to respire The best explanation: Fishes respire through their gills in WATER and have no other means for BREATHING on land. So, when taken out of the water, they die DUE to the absence of oxygen. Fishes live in water because of the presence of dissolved oxygen PRESENT in water BODIES.

Discussion

74.	Decrease in thoracic volume is marked by________(a) diaphragm relaxed(b) diaphragm contracted(c) sternum moving towards ventral and anterior direction(d) ribs moving outThis question was addressed to me in an online quiz.My question is from Mechanism of Breathing-1 in portion Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct choice is (a) diaphragm relaxed The explanation: Decrease in thoracic volume is NECESSARY for expiration and is MARKED by relaxation in diaphragm and external intercostal MUSCLE. Decrease in thoracic volume is necessary in order to build more PRESSURE than atmospheric pressure.

Discussion

75.	Vital capacity = ________(a) ERV + RV(b) IRV + TV(c) IRV + TV + ERV + RV(d) IRV + ERV + TVI had been asked this question during an internship interview.I would like to ask this question from Mechanism of Breathing-1 topic in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» The correct choice is (d) IRV + ERV + TV The BEST explanation: VITAL capacity is the amount of AIR that can be expired by most forceful expiration after a deepest INSPIRATION. Inspiratory RESERVE volume, expiratory reserve volume and tidal volume are included in it.

Discussion

76.	What is the primary site for exchange of gases in lungs?(a) Larynx(b) Trachea(c) Alveoli(d) BronchiThis question was addressed to me in an interview for internship.This is a very interesting question from Exchange of Gases topic in section Breathing and Exchange of Gases of Biology – Class 11
Answer» Right CHOICE is (c) Alveoli The best I can EXPLAIN: Alveoli are the primary SITE for exchange of gases in lungs. Exchange of gases is found only in respiratory zone of the lungs, as they are covered by simple SQUAMOUS epithelium.

Discussion

77.	The amount of air inspired or expired during normal breathing is_________ ml.(a) 500(b) 500-1000(c) 1000-1100(d) 2100I got this question in final exam.This is a very interesting question from Mechanism of Breathing-1 in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» The correct option is (a) 500 The explanation: Tidal volume is the amount of air inspired or EXPIRED during normal breathing. Its value for man is 500ML, out of which 150ml is dead space volume which remains in the RESPIRATORY tract.

Discussion

78.	Pleura is _______ layered.(a) Not(b) Single(c) Double(d) TripleThis question was posed to me in exam.Enquiry is from Human Respiratory System in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» Right answer is (C) Double The best I can explain: PLEURA is doubled LAYERED. It protects the lungs. ALSO, there is a fluid called pleural fluid present between the pleura. It reduces the friction between the SURFACES of the lungs.

Discussion

79.	In which respiratory part does the diffusion of gas take place?(a) Alveoli(b) Bronchi(c) Bronchioles(d) TracheaThis question was addressed to me in class test.Query is from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» RIGHT option is (a) ALVEOLI To explain: Alveoli is the part where the diffusion of gases takes PLACE. It exchanges oxygen and carbon DIOXIDE between the bloodstream. They are arranged as small balloon CLUSTERS throughout the lungs.

Discussion

80.	Which of the following is not a characteristic of alveoli?(a) Thick(b) Thin(c) Irregular walled(d) VascularizedI got this question in an internship interview.My doubt stems from Human Respiratory System in chapter Breathing and Exchange of Gases of Biology – Class 11
Answer» Correct option is (a) Thick Explanation: Alveoli is a thin, irregular walled and vascularized bag-like structure. It is the main site for DIFFUSION of gases. Terminal bronchioles give rise to alveoli. Lungs without alveoli is a dead lung as they PLAY a MAJOR role in respiration.

Discussion

81.	Trachea is a straight tube extending up to the ________(a) end of pharynx(b) middle of larynx(c) posterior of the thoracic cavity(d) anterior of the thoracic cavityThe question was posed to me in an international level competition.My query is from Human Respiratory System topic in division Breathing and Exchange of Gases of Biology – Class 11
Answer» Right CHOICE is (d) anterior of the thoracic CAVITY Explanation: Trachea is a straight tube extending up to the anterior part of the thoracic cavity. It is also KNOWN as the windpipe. The trachea connects the soundbox to the bronchi. Also, it provides the PASSAGE for air.

Discussion

Explore topic-wise InterviewSolutions in .

Alveoli is derived from the__________(a) endoderm(b) ectoderm(c) mesoderm(d) ecto-mesodermThe question was posed to me in quiz.I'm obligated to ask this question of Human Respiratory System in division Breathing and Exchange of Gases of Biology – Class 11

Diaphragm increases volume of thoracic cavity in _________(a) dorsal-ventral axis(b) anterior posterior axis(c) lateral regions(d) side waysThis question was addressed to me in quiz.Question is from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11

What is the concentration of oxygen in expired air?(a) 19%(b) 4%(c) 10%(d) 16%This question was posed to me in an online quiz.I need to ask this question from Exchange of Gases in portion Breathing and Exchange of Gases of Biology – Class 11

Aquatic arthropods and mollusks use which organ for respiration?(a) Lungs(b) Gills(c) Eyes(d) NoseThis question was addressed to me during an interview.My doubt is from Respiration in Animals in chapter Breathing and Exchange of Gases of Biology – Class 11

The signal for voluntary muscle for forced breathing starts in ______(a) medulla(b) cerebrum(c) pons(d) cerebellumThis question was addressed to me during an internship interview.Enquiry is from Mechanism of Breathing-2 topic in division Breathing and Exchange of Gases of Biology – Class 11

Dead space air is _______(a) 150 CC(b) 350 CC(c) 500 CC(d) 1500 CCThis question was posed to me in an online interview.This question is from Mechanism of Breathing-2 topic in portion Breathing and Exchange of Gases of Biology – Class 11

Carbon dioxide is harmful to the body.(a) True(b) FalseThe question was asked during an interview.This is a very interesting question from Respiration in Animals in chapter Breathing and Exchange of Gases of Biology – Class 11

Tracheal tubes are present for which type of organisms?(a) Birds(b) Worms(c) Frogs(d) InsectsThis question was addressed to me in exam.My question is from Respiration in Animals in division Breathing and Exchange of Gases of Biology – Class 11

Where is the respiratory rhythm center is located?(a) Medulla region(b) Aortic arch(c) Pons region(d) Carotid arteryI had been asked this question in unit test.Origin of the question is Mechanism of Breathing-2 in section Breathing and Exchange of Gases of Biology – Class 11

Vital capacity = ________(a) ERV + RV(b) IRV + TV(c) IRV + TV + ERV + RV(d) IRV + ERV + TVI had been asked this question during an internship interview.I would like to ask this question from Mechanism of Breathing-1 topic in chapter Breathing and Exchange of Gases of Biology – Class 11

What is the primary site for exchange of gases in lungs?(a) Larynx(b) Trachea(c) Alveoli(d) BronchiThis question was addressed to me in an interview for internship.This is a very interesting question from Exchange of Gases topic in section Breathing and Exchange of Gases of Biology – Class 11

The amount of air inspired or expired during normal breathing is_________ ml.(a) 500(b) 500-1000(c) 1000-1100(d) 2100I got this question in final exam.This is a very interesting question from Mechanism of Breathing-1 in chapter Breathing and Exchange of Gases of Biology – Class 11

Pleura is _______ layered.(a) Not(b) Single(c) Double(d) TripleThis question was posed to me in exam.Enquiry is from Human Respiratory System in chapter Breathing and Exchange of Gases of Biology – Class 11

In which respiratory part does the diffusion of gas take place?(a) Alveoli(b) Bronchi(c) Bronchioles(d) TracheaThis question was addressed to me in class test.Query is from Human Respiratory System topic in chapter Breathing and Exchange of Gases of Biology – Class 11

Which of the following is not a characteristic of alveoli?(a) Thick(b) Thin(c) Irregular walled(d) VascularizedI got this question in an internship interview.My doubt stems from Human Respiratory System in chapter Breathing and Exchange of Gases of Biology – Class 11