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551.

Which energy is consumed in breathing?A. MechanicalB. ChemicalC. BioelectricalD. Physical

Answer» Correct Answer - B
552.

Name two animals which carry on anaerobic respiration.

Answer» Tapeworm , A scaris
553.

Respiratory organs of scorpions areA. GillsB. Book lungsC. SkinD. Book gills

Answer» Correct Answer - B
554.

What are the respiratory organs of fishes.

Answer» Gills (branchiae)
555.

Where are conchae located ?

Answer» Nasal chambers.
556.

Where does the exchange of gases occur?

Answer» Lung alveoli and tissue cells .
557.

Give the vital capacity of the lungs of a normal adult person.

Answer» 3.5 to 4.5 litres.
558.

What are choanae?

Answer» Internal nares.
559.

Name the cavities which are separated by palate.

Answer» Nasal chambers and oral cavity
560.

Give the name of the partition between thorax and abdomen.

Answer» Correct Answer - Diaphragm.
561.

Which of the following would have the same `O_(2)` content?A. Blood entering the lungs and blood leaving the lungsB. Blood entering the right side of the heart and blood leaving the right side of the heartC. Blood entering the right side of the heart and blood leaving the left side of the heartD. Blood entering the tissue capillaries and blood leaving the tissue capillaries

Answer» Correct Answer - B
Blood entering the right side of the heart i.e., right atrium is a deoxygenated blood having partial pressure of 40 mm Hg. Blood leving the right side of the heart i.e., right ventricle will also have almost same partial pressure as the blood is moving from right atrium to right ventricle and also no exchange of gases occurs blood it is `40 mm` Hg.
562.

Consider the following statement each with two blanks. (i) Diaphragm contrects to help in `overset((1))"_____"` while the contraction of abdominal muscles help in `overset((2))"_______"`. (ii) Vital capacity of trained atheles is `overset((3))"______"` than that of non-athletes while the vital capacity of non-smokers is `overset((4))"______"` than that of smokers. Which of the follwoing options gives the correct fill ups for the respective blanks numbered from (1) to (6) in the above statements ?A. `(1)`-expiration, `(2)`-inspiration, `(5)`-higher, `(6)`-lowerB. `(3)`-higher, `(4)`-lower, `5`-lower `(6)`-higherC. `(1)`-inspiration, `(2)`-forced expiration, `(3)`-higher, `(4)`-higherD. `(1)`-expiration, `(2)`-forced expiration, `(5)`-higher, `(6)`-lower

Answer» Correct Answer - C
563.

Fill in the blanks with correct words : (a) Diaphragm contracts to help in `"........."` while the contraction of abdominal muscles helps in `"........."` (b) vital capacity of trained athletes is `"........."` than that of non-athletes while the vital capacity of non- smokers is `"........."` than that of smokers. ( c) Leeches `Po_(2)` is `"........."` than the venous `Po_(2)` while arterial `Po_(2)` is `"........."` than the alveolar `Po_(2)` ( e ) The volume of air left in the lungs after a maximum expiration is called `"........."` while the volume of air breathed out during a normal restful respiration is called `"........."`

Answer» (a) Inspiration forced expiration ., (b) Higher , higher , (c ) Skin gills , (d) Higher , lower , (e ) Residual volume tidal volume .
564.

Assertion: Abdominal muscles is related with respiration in animals. Reason: Relaxation of abdominal muscles draws in air.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 - A
565.

About 1200 mL of air is always known to remain inside the human lungs it is described asA. functional residual capactiyB. residual volumeC. expiratory reserve volumeD. inspiratory reserve volume

Answer» Correct Answer - B
566.

The amount of air remaining in the air passages and alveloi at the end of quiet respiration isA. tidal volumeB. residual volumeC. inspirting reserve volumeD. functin residual capacity

Answer» Correct Answer - D
567.

Mark the true statement among the following with reference to normal breathing.A. Inspiration is a passive process where as expiration is activeB. Inspiration is a active process where as expiration is passiveC. Inspiration and expiration are active processesD. Inspiration and expiration are passive processes

Answer» Correct Answer - B
568.

The number of RBCs in main incrases if he lives at a higher altitude becauseA. there is less oxygen in mountainsB. there is more oxygen at the mountainsC. there are no germs in the sair in mountainD. more heat is required to be produced in the body for keeping warm

Answer» Correct Answer - A
569.

If a person living at sea level migrates to about 8000 feet high hill his blood after abuot fifteen days will mainlyA. have fewer wbcsB. have more plasmaC. have increase in volume o fserumD. have greater number of rvcs and more haemoglobin

Answer» Correct Answer - D
570.

Lack of breathing isA. apneaB. eupneaC. dyspneaD. asphyxia

Answer» Correct Answer - A
571.

When some food particle enters the winpipe instead of oesphagus it is expelled by the process ofA. sneezingB. coughingC. yawningD. hiccupping

Answer» Correct Answer - B
572.

The maximum amount of air that our lung can normally hold isA. vital capacityB. tidal capacityC. total lund capactiyD. pulmonary capacity

Answer» Correct Answer - C
573.

The total lung capacity is rpresented byA. tidal volume + vital capacityB. tidal volume + functional residual capacityC. vital capacity + residual volumeD. inspiratory and expiratiory reservbe volumes

Answer» Correct Answer - C
574.

Write the names of the respiratory organs present in human beings

Answer» External nares or nostrils nasal cavity nasopharynx, larynx, trachea , bronchi bronchiole and
575.

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

Answer» for efficient exchange of geses respiratory surface must have certain characteristics such as (i) it must be thin . Moist and permeable to respiratory gases (ii) it must be very large (iii) it must be highly vascular. Only alveolar region has these characteristics . Thus diffusion of gases occurs in this region only.
576.

Which of the following statements about the mechanism of ventilation/breacthing is incorrect ?A. As the diaphragm relaxes, air is expelled from the respiratory system.B. During inspration the lungs act as suction pump.C. Inspiration is a passive and expiration is an active process.D. For quiet breathing, external intercostal muscles and diaphragm play an important role.

Answer» Correct Answer - C
Inspiration is an active and expiration is a passive process.
577.

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 dioxideB. carbon monoxideC. carbon disulphideD. chloroform

Answer» Correct Answer - B
578.

The alveolar epithemlium in the lung isA. cilitate columnarB. cilitated squamousC. nonciliated squamousD. noncillated columnar

Answer» Correct Answer - C
579.

Lungsalveoli of mammals have a thin wall composed ofA. simple cuboidal epitheliumB. simple squamous epitheliumC. stratified cuboidal epitheliumD. stratified squammous epithelium

Answer» Correct Answer - B
580.

Which one of the following has the samllest diamter?A. tracheaB. secondary bronchioleC. respiratory bronchioleD. left primary bronchus

Answer» Correct Answer - C
581.

The epithelium of bronchioles isA. Pseudostratified and columnarB. Sqamous and sensoryC. Pseudostratified and sensoryD. Cuboidal and columnar .

Answer» Correct Answer - B
582.

Terminals bronchioles brach to fromA. alveoliB. bronchilesC. alveolar ductD. respeiratory bronchiole

Answer» Correct Answer - D
583.

Increased asthmatic attacks in certain seasons are related toA. Hot and humid environmentB. Eating fruits preserved in tin containersC. Inhalation of seasonal pollenD. Low temperature

Answer» Correct Answer - c
becouse plants release pollen grain a fix time and it is generally March - April or Aug- sep .
584.

The state during which the respiratory centre is inhibited is termed asA. AsphyxiaB. SuffocationC. AnoxiaD. Chocking

Answer» Correct Answer - c
585.

Which of the following is not pollution related disorder?A. SilicosisB. PneumoconiosisC. FlourosisD. Leprosy

Answer» Correct Answer - D
586.

The state during which the respiratory centre is inhibited is termed asA. asphyxiaB. chokingC. anoxiaD. suffocation

Answer» Correct Answer - A
587.

Brochitis is related withA. inflammation of the bronchi and bronchiolesB. discolouration of skinC. allergic reaction in nasal liningD. excess of oxygenated Hb

Answer» Correct Answer - A
588.

Haemoglobin is aA. Vitamin B. Skin pigment C. Blood carrierD. Respiratory pigment

Answer» Correct Answer - D
Haemoglobin is a respiratory pigment.Â
589.

Compound soluble in water which does not impede oxygen transporation isA. `SO_(2)`B. `SO_(3)`C. COD. NO

Answer» Correct Answer - A
`SO_(2)` is soluble in water but does not impede oxygen transportation.
590.

If alveolar ventilation is `4200 mL//min`, respiratory frequency is `12` breaths per minute, and tidal volume is `500` mL, what is the anatomical-dead-space ventialtion ?A. `1800 "mL"//"min"`B. `6000 "mL"//"min"`C. `350 "mL"//"min"`D. `1200 "mL"//"min"`

Answer» Correct Answer - A
Total minute ventilations is comprised of dead space plus alveolar ventilation. Minute ventilation is respiratory frequnecy (`12` breaths per minue) multipled by tidal pressure `(500 "mL"//"breath") = 6000 "mL"//"min")`. Subtract alveolar ventilation `(4200 "mL"//"min")` from that i.e., `6000-4200 = 1800 "mL"//"min"`.
591.

What is dead space air ?

Answer» During normal breathing about 500 ml of air is inspired (tidal volume ) by an average adult human being.
Only about 350 ml of air enters the lungs alveoli for the exchange of gases and remaining 150 ml fills the respiratory passage . The latter is often called dead air space.
592.

thyroid is a cartilgenous plate inA. skull of rabbitB. larynx of rabbitC. Vertebrace of rabbitD. sternum of rabbit

Answer» Correct Answer - b
593.

what is true about haemoglobinA. it is dipeptide and present in red blood corpuscles in earthwormB. it is present in the dissolved state in blood plasma in earthwormC. it is dipeptide in mammals and localised in red blood corpusclesD. it is present in dissolved state in blood plasma in scorpions

Answer» Correct Answer - b
594.

lung ventilation movements are due toA. costal muscles and diaphragmB. costal musclesC. diaphragmD. wall of the lungs

Answer» Correct Answer - a
595.

Given these lung volumesA. 3500 mLB. 2000 mLC. 6000 mLD. 3000 mL

Answer» Correct Answer - B
596.

In human, oblique fissure is present inA. Right lungB. Lft lungC. Both of theseD. None of these

Answer» Correct Answer - C
597.

In human, oblique fissure is present inA. Right lungB. Left lungC. Both of theseD. None of these

Answer» Correct Answer - C
598.

Which of the following prevent collaspsing of trachea ?A. MusclesB. DiaphragmC. RibsD. Catilaginous rings.

Answer» Correct Answer - D
599.

The number of alveoli in the human lungs has been estimated to be approximatelyA. 100 millionB. 300 millionC. 125 millionD. 300 billion

Answer» Correct Answer - B
600.

Trachea is lined with incomplete rings ofA. Fibrous cartilageB. Calcified carilageC. Elastic cartilageD. Hyaline cartilage

Answer» Correct Answer - D