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651.

In hurdle race, which of the following is accumulated in the leg muscleA. Performed ATPB. GlycolysisC. LactateD. Oxidative metabolism

Answer» Correct Answer - b
652.

Which one of the following statements is incorrect?A. The residual air in lungs slightly decreases the efficiency of respiration in mammalsB. The presence of non-respiratory air sacs, increases the efficiency of respiration in birdsC. In insects, circulating body fluids serve to distribute oxygen to tissuesD. The principle of countercurrent flow facilitates efficient respiration in gills of fishes

Answer» Correct Answer - C
653.

Which one of the following is the correct statement for respiration in humans ?A. Neural signals form peneumotoxic centre in poins region of brain can increaseB. worker in grinding and stone breaking industries may suffer from lung fibrosisC. about 90% of carbon dioxide `(CO_(2))` is carried by haemoglobin as carbamino haemoglobinD. cigarette smoking may lead to inflammation of bronchi

Answer» Correct Answer - B
option (4) is also a correct answer as smoking chronic bornchities but per NECRT (2) seems to be a better choice
654.

Name the organs of respiration in the following organisms. (a) Flatworm .........`" "` (b) Birds ......... (c) Frog .........`" "` (d) Cockroach ........ .

Answer» (a) body surface
(b) Lungs
(c ) Skin , buccopharyngeal lining lungs
(d ) Tracheae.
655.

How do the epiglottis and uvula differ in their role ?

Answer» Epiglottis closes the glottis and uvula covers the internal nares during swallowing so that the food enters the oesophagus only .
656.

How do the words oxygenation and oxidation differ ?

Answer» Oxygenation means combination of `O_(2)` with haemoglobin in the respiratory organs . Oxdation is a chemical process in which molecular oxygen is added to a compound or hydrogen atoms or electrons are remove from it .
657.

How are marine mammals able to make long underwater dives ? Explain.

Answer» Marine mammals (e.g. whales seals ) can make long underwater dives as they have
(i) more blood per kg of body weight ,
(ii) can store more oxygen in blood and muscles,
(iii) have a large spleen with a considerable stockpile of blood and
(iv) can reduce `O_(2)` consumption rate when under water .
658.

Which of the following is false ?A. Blood from the right side of heart is carried to lungs by pulmonary artery.B. Pleura is double covering of kidney .C. Pancreas is both exocrine and endocrine gland.D. Scurvy is due to vitamin C deficiency.

Answer» Correct Answer - B
659.

Respiratory system is derived fromA. EndodermB. MesodermC.  Ectoderm D. None of the above

Answer» Correct Answer - A
Respiratory system is derived by endoderm.Â
660.

What is silicosis ? In which way affects the respiratory system ?

Answer» Silicosis is an occupational disease which occurs due to continuous exposure of persons to silica dust .
As a result of chromic exposure. Fibrosis of upper part of lung occurs causing inflammation.
661.

Pneumonia can be caused byA. Bacteria ( Streptococcus penumoniae )B. ProtozoanC. FungiD. All of these

Answer» Correct Answer - D
662.

Respiratory system is derived fromA. EndodermB. MesodermC. EctodermD. None of these

Answer» Correct Answer - A
663.

Assertion: The first step of gas exchange occurs through body surface in some animals. Reason: Body surface or membrane of amphibia is thick in nature.A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.B. If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion.C. If Assertion is true, but Reason is falseD. If both Assertion and Reason are false.

Answer» Correct Answer - C
664.

A person met with an accident and died instantly without and injury to heart, brain, stomach and kidney. One of the following is a reason for his death.A. Intestine got twistedB. RBCs became coagulatedC. Stomach stopped digestionD. Diaphragm got punctured

Answer» Correct Answer - D
665.

The Drosal Respiratory group (DRG) is locatedA. dorsal portion of ponsB. ventral portion of ponsC. dorsal portion of medulla oblongataD. ventral portion of medulla oblongata

Answer» Correct Answer - C
666.

Leat amount of `CO_(2)` is carried out in____

Answer» Correct Answer - dissolved state through plasma
667.

Exchange of gases in lungs is byA. simple diffusionB. active transportC. passive transportD. osmosis

Answer» Correct Answer - A
668.

Match the following columns : A. 2,1,4,3B. 1,4,2,3C. 1,3,2,4D. 1,2,4,3

Answer» Correct Answer - B
669.

Match the following columns : A. 2,4,1,3B. 3,4,1,2C. 3,2,1,4D. 2,4,3,1

Answer» Correct Answer - B
670.

which among the following has the maximum affinity to combine with oxygen ?A. Adult haemoglobinB. MyoglobinC. Foetal haemoglobinD. Hemocyanin

Answer» Correct Answer - B
671.

Ventilation rate may be expressed asA. inspiratory reserve volume `xx` frequency of respirationB. expiratory reserve volume `xx` frequency of respirationC. tidal volume ` xx` frequency of respirationD. vital capacity `xx` frequency of respiration

Answer» Correct Answer - C
672.

Dead space air is theA. amount of air remaining in the alveoliB. amount of air left behind lungs at the end of deep expirationC. amount of air taken and outD. air left in the bronchial tree

Answer» Correct Answer - D
673.

If a large number of people are enclosed in a room thenA. oxygen decreases and carbon dioxide increasesB. oxygen increases and carbon dioxide decreasesC. both oxygen and carbon dioxide decreasesD. both oxygen and carbon dioxide increases

Answer» Correct Answer - A
674.

Air moves into the lungs when atmospheric pressure isA. less than pressure within the lungsB. greater than pressure within the lungsC. equal to the pressure within the lungsD. None of the above

Answer» Correct Answer - B
675.

Artificial respiration at the rate of 10-15 times per minute is being given to a man saved from drowning. This is because .A. the water in the respiratory passage is cleared fast at this rateB. it is the normal rate of breathingC. choking is least at this rateD. the lungs are ventilated best at this rate

Answer» Correct Answer - A
676.

What is the role of carbonic anhydrase enzyme in the transport of gases during respiration ?

Answer» Correct Answer - See text.
677.

The apparatus shown is used to investigate gas exchange during breathing. Which one of the following would occur when a preson blows through tube M ?A. the solutions in X and Y both turn cloudyB. The solution in X remains clear, but that in Y turns cloudyC. The solution in X turns cloudy,but that in Y remains cloudy .D. The solution in X is forced out through the tube T.

Answer» Correct Answer - B
678.

Ptessure within the lungs is calledA. Ptessure within the lungs is calledB. Ptessure within the lungs is calledC. Interstitial pressureD. Alveolar pressure

Answer» Correct Answer - B
Pressure within the lungs is called intra-pulmonary pressure.Â
679.

Complete the follwing sentence by selectring the correct option. the breathing rhythm is geneerated in the `overset((i))"______"` and is influenced by variation in levels of `overset((ii))"______"` in the blood.A. `{:("(i)",(ii)),("medulla",CO_(2)):}`B. `{:("(i)",(ii)),("medulla",O_(2)):}`C. `{:("(i)",(ii)),("frontal lobe",CO_(2) and O_(2)):}`D. `{:("(i)",(ii)),("frontal lobe",CO_(2)):}`

Answer» Correct Answer - A
The basic rhythm of respiration is generated mainly in the dorsal respiratory group in the medulla. Changes in blood carbon dioxide is believed to stimulate the neurons in chemosensitive area which affect the rhythm centre. `CO_(2)` acts by forming carbonic acid which dissociates into `H^(+)` and `HCO_(3)^(-)` `H^(+)` has direct effect on this. Oxygen does ot have a significant direct effect on rhythm centre.
680.

Normal breathing rate of a healthy human is

Answer» Correct Answer - 12-16 times/min
681.

Define tidal volume

Answer» It is the volume of air inspired or expired during a normal breathing
682.

Match column I with column II and select the correct option from the given codes. `{:(,"Column I",,"Column II"),(A.,"Tidal volume",(i),2500-3000 mL "of air"),(B.,"Inspiratory reserve volume",(ii),1000 mL "of air"),(C.,"Expiratory reserve volume",(iii),500mL "of air"),(D.,"Residual volume",(iv),3400-4800mL "of air"),(E.,"Vital capacity",(v),1200mL "of air"):}`.A. A-(iii), B-(iv), C-(ii), D-(i), E-(v)B. A-(iii), B-(i), C-(ii), D-(v), E-(iv)C. A-(iii), B-(i), C-(iv), D-(iv), E-(ii)D. A-(v), B-(i), C-(ii), D-(iii), E-(iv)

Answer» Correct Answer - B
683.

Blood analysis of a patient reveals an unusually high quantity of carboxyhemoglobin content. Which of the following conclusion is the most likely to be correct? The patient has been inhaling poliuted air containing unusually high content ofA. carbon disulphideB. chloroformC. carbon dioxideD. carbon monoxide

Answer» Correct Answer - D
684.

Blood analysis of a patient reveals an ususually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct ?A. carbon disulphideB. chloroformC. carbon dioxide reacts with water to form carbonic acid that lowers the pH in tissueD. carbon monoxide.

Answer» Correct Answer - D
685.

Oygen in lungs ultimately reaches inA. AlveoliB. tracheaC. BronchusD. bronchioles

Answer» Correct Answer - a
686.

Apnoea isA. Decreased ventilationB. Absence of breathingC. Laboured breathingD. Increased ventilation

Answer» Correct Answer - B
Apnoea is absence of breathing.Â
687.

Apnoea isA. absence of breathingB. decreased ventilationC. increased ventilationD. laboured breathing

Answer» Correct Answer - A
688.

The decompression sickness isA. respiration under depressionB. sickness develops after coming the sea surface from a great depthC. sickness develops after attaining a high altitudeD. sickness develops after coming on earth surface from the mines

Answer» Correct Answer - B
689.

in man and mammals , air passes from outside into the lungs throughA. Nasal cabity, larynx, pharynx, trachea, bronchi, alveoliB. Nasal cavity, larynx, pharyx, trachea, bronchioles, alveoliC. Nasal cavity, pharynx, larynx, trachea, bronchioles, bronchi, alveoliD. Nasal cabity, pharynx, larynx, trachea, bronchi bronchioles, alveoli

Answer» Correct Answer - D
690.

in man and mammals , air passes from outside into the lungs throughA. Nasal cavity , larynx , pharynx, trachea bronchi , alveoliB. Nasal cavity , larynx , pharynx , trachea , bronchioles, alveoliC. nasal cavity , pharynx , larynx , trachea , bronchioles , bronchi , alveoliD. Nasal cavity ,pharynx , larynx , trachea, bronchi , bronchioles , alveoli

Answer» Correct Answer - d
691.

in man and mammals , air passes from outside into the lungs throughA. nasal cavity , larynx, pharynx, trachea, bronchi, alveoliB. nasal cavity, larynx, pharynx, trachea, bronchioles , alveoliC. nasal cavity , pharynx, larynx, trachea, bronchioles, bronchi , alvoliD. nasal cavity, pharynx, larynx, trachea, bronchioles, alveoli

Answer» Correct Answer - D
692.

Inspiratory centre is located inA. cerebellumB. cerebrumC. hypothalamusD. medulla oblongata

Answer» Correct Answer - D
693.

Identify the correctly matched option from below :A. Eupnoea - Increased breathing rateB. Dyspnea - Normal breathing rateC. Tachypnea - Rapid shallow breathingD. Hypercapnia - painful breathing

Answer» Correct Answer - C
694.

Emphysema is aA. Cardiovascular diseasB. Pulmonary diseasC. Renal diseaseD. Neural dlsease

Answer» Correct Answer - B
Emphysema is a pulmonary disease.Â
695.

Cyanosis isA. Lack of oxygen in body fluidsB. Difficult or heavy breathingC. Excess of carbon dixode in the body fluidsD. Skin turning blue due to excessive amount of deoxygenated haemoglobin in the skin blood vessels

Answer» Correct Answer - d
Cyanosis is blueness of skin and occurs due to large amount fo deoxygenated hemoglobin in cutaneous vessels.
696.

Given in the box are certain disorders of human body. Asthma, Cyanosis, Blue baby syndrome, Atelectasis , jaundice , Anthracosis , Epilepsy , Asbestosis How many disorders from above are associated with human respiratory system ?A. ThreeB. FourC. FiveD. Six

Answer» Correct Answer - C
697.

which of the following can cause atelectasis ?A. Blockage of small bronchi with mucusB. Obstruction of a major bronchusC. Lack of surfactant in fluids lining the alveoliD. All of the above

Answer» Correct Answer - D
698.

A child was killed through asphyxiation. Postmortem confmned it because a piece of lung put in waterA. Settled downB. Kept floating C.  Had blood spotsD. None of the above

Answer» Correct Answer - B
A child was killed through asphyxiation. Post mortem confirmed it because a piece of lung put in water kept floating.Â
699.

the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and main function and / or characteristic A. A- Trachea-long tube supported by complete cartilaginous rings for conducting inspired airB. B- Pleural membrane - surround ribs on both sides to provide cushion against rubbingC. C-Alveoli-thin- walled vascular bag-like structure for exchange of gasesD. D-Lower end of lungs - diaphragm pulls it down during inspiration.

Answer» Correct Answer - C
C-Alveoli are thin -walled vascular bag-like structures for exchange of gases. A -trachea on windpipe is an air conducting tube through which trasport of gases takes place. B- pleural membrane is double layered, which reduces frication on the lung surface. D-diaphragm is involved in the inspiration and expiration process of breathing .
700.

the figure shows a diagrammatic view of human respiratory system with labels A, B , C and D . Select the option which given correct identification and main function and / or characteristic A. B-Pleural membrane - Surrounds ribs on both sides to provide cushion against rubbing.B. C-Alveoli -Thin-walled vascular bag-like structures for exchange of gases.C. D-Lower end of lungs -Diaphragms pulls it down during inspiration.D. A- Trachea-Long tueb supported by complete cartilaginous rings for conducting inspired air.

Answer» Correct Answer - B