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751.

The carbon dioxide is transported via blood to lungs mostlyA. In combination with haemogleobin onlyB. Dissolved in blood plasma onlyC. In the form of carbonic acid onlyD. As carbaminohaemoglobin and as bicarbonates

Answer» Correct Answer - D
752.

The carbon dioxide is transported via blood to lungs mostlyA. in the form of carbonic acid onlyB. as biscarbonatesC. in combination with haemoglobin onlyD. dissolved in blood plasma

Answer» Correct Answer - B
753.

The carbon dioxide is transported via blood to lungs mostlyA. in combination with haemoglobin onlyB. dissolved in blood plasmaC. in the form of bicarbontesD. as carbaminohaemoglobin.

Answer» Correct Answer - C
754.

Assertion . Aerobic respiration is bioenergetically more efficient than anaerobic respiration. Reason. Aerobic respiration takes place in mitochondria whereas anaerobic respiration occurs in the cytoplasm.A. If both A and R are true and R is the correct explanation of A.B. If both A and R are true but R is not the correct explanation of AC. if A is true but R is false.D. If both A and R are false.

Answer» Correct Answer - B
755.

Which enzyme is most abundantly found in RBC ?A. Carbonic anhydraseB. HemoglobinC. AlbuminD. Thrombinase

Answer» Correct Answer - A
756.

SARS is caused by the variant ofA. Pneumococcus pneumoniaB. Common cold coronavirusC. AsthmaD. Brochitis

Answer» Correct Answer - B
757.

Combination of haemoglobin with `O_(2)` in lungs can be promoted byA. Decreasing `O_(2)` concentration in bloodB. Increasin `O_(2)` concentration in airC. Increasing `CO_(2)` concentration in airD. Decreasing `CO_(2)` concentration in air.

Answer» Correct Answer - B
758.

Which of the following gases makes the most stable combination with the haemoglobin of RBCs?A. `CO_(2)`B. `CO`C. `O_(2)`D. `N_(2)`

Answer» Correct Answer - B
759.

Combination of haemoglobin with `O_(2)` in lungs can be promoted byA. increasing carbon dioxide concentration in bloodB. increasing oxygen concentration in bloodC. decreasing oxygen concentration in bloodD. introducing carbon monoxide in blood

Answer» Correct Answer - C
760.

Oxygen content reduction makes the glycolyse (glycogenesis) intensity increased due toA. Increse of ADP concentration in cellB. Increase of `NAD^(+)` concentration in cellC. Increase of ATP concentration in cellD. Increase of concentration of peroxides and free radicals

Answer» Correct Answer - a
761.

Read the following statements and select the correct oneA. The `H^(+)` relased form carbonic acid combines with haemoglobin to form heamoglobinic acidB. oxyheamoglobin of erthrocytes is alkalineC. more than 70 % of carbon dioxide is transferred from tissues to the lungs in the form of carbamino compoundsD. in a healthy person , the haemoglobin content is more than 25 gms per 100 ml

Answer» Correct Answer - a
762.

the haeme - protein complexes which act is oxidising agents are known asA. haemoglobinB. myoglobinC. ChlorophyllD. Cytochrome

Answer» Correct Answer - d
763.

Which of the following option is incorrect about the larynx (sound box) ?A. It is a bony boxB. Glottis is the opening into the larynx.C. During swallowing of food glottis is covered by epiglottis to prevent food entry into the larynx.D. All of these

Answer» Correct Answer - A
Larnx is a cartilaginous box containing nine pieces of cartilages.
764.

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled becauseA. Pressure in the lungs is higher than the atmospheric pressureB. There is a negative pressure in the lungsC. There is a negative intrapleural pressure pulling at the lung wallsD. There is a positive intrapleural pressure

Answer» Correct Answer - c
765.

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled becauseA. There is a negative pressure in the lungsB. There is a negative intrapleural pressure pulling at the lung wallsC. There is a positive intrapleural pressureD. Pressure in the lungs in higher than the atmospheric pressure

Answer» Correct Answer - B
766.

Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled becauseA. there is a negative pressure in the lungsB. there is a negative intrapleural pressure pulling at the lung wallsC. there is a positive intrapleural pressureD. pressure in the lungs is higher than the atmospheric pressure

Answer» Correct Answer - B
767.

Go through the following statements (i) haemoglobin is 50% satruated at arund 40-50 mm gh (ii) maternal haemolgobin has greater afinity for `O_(2)` as compared to foetal haemoglobib (iii) olfactory epithelium of nose is called scheniderian membrane (iv) the level of `CO_(2)` has stronger effect on regulation of breathing as compard to `O_(2)` level which of these are correct ?A. I , iii & ivB. ii & iiiC. I,ii & iiiD. iii & iv

Answer» Correct Answer - D
Hb is 50% saturated at 25-30 mm of Hg foetalHb has higher affinity for `O_(2)` as compared to maternal Hb
768.

The hemoglobin of a human fetus.A. Has higher affinity for oxygen than that of an adultB. Has a lower affinity for oxygen than that of an adultC. Has same affinity for oxygen as that of an adultD. Has two protein sub- units instead of four.

Answer» Correct Answer - A
769.

In which form iron is present hemoglobin ?A. IonicB. UnionicC. `Fe^(2+)`D. `Fe^(3+)`

Answer» Correct Answer - A
770.

`CO_(2)` is transported mainly as `:-`A. Respiratory pigmentB. Dissolution of gasesC. `O_(2)` taken by tissuesD. Bicarbonates

Answer» Correct Answer - D
771.

The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately byA. `200` timesB. `1000` timesC. `2` timesD. `20` times

Answer» Correct Answer - A
772.

The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately byA. 2 timeB. 20 timesC. 2000 timesD. 200-300 times

Answer» Correct Answer - D
773.

Which of the following structure is not supported by in complete cartilaginous rings.A. TracheaB. Secondary bronchiC. Terminal bronchiolesD. Primary bronchi

Answer» Correct Answer - C
774.

A: Normal expiration during quiet breathing, unlike inspiration, is a passive process because on muscular contractions are involved. R: Normal expiration results from the elastic recoil of the chest wall and lungs.A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)B. If both Assertion & Reason are trye but the reason is not the correct explanation of the assertion , then mark (2)C. If Assertion is true statement but Reason is fakse, then mark (3)D. If both Assertion and Reason are false statements, then mark (4)

Answer» Correct Answer - A
775.

Most abundant, harmful and universal waste product of metabolism isA. `Co_(2)`B. uric acidC. `H_(2)O`D. none of these

Answer» Correct Answer - A
776.

The respiratory system in humans and other lung-breathing vertebrates can be divided into I. conducting portion II. Respiratory portion III. Upper portion IV. Lower portionA. Only IB. III and IVC. Only IID. I and II

Answer» Correct Answer - D
777.

Study the following diagram and consider the statements following in regard to the labels . I. A is lined by pseudostratified ciliated columnar epithelium bearing glandular cells and cartilaginous ring. II. B is the part of lung where major exchange of gases takes place. III. C decreases both in diameter and thickness as it gets take place. IV. D is part of lung where exchange of gases do not take place. Choose the correct set of statements.A. I , II and IIIB. II, III and IVC. I and IIID. II and IV

Answer» Correct Answer - C
778.

Certain bacteria that cause bronchities are I. Streptococcus pneumoniae II. Haemophilus influenzae III. Yersinia pestis IV. Clostridium tetaniA. I and IIB. III and IVC. Only IVD. Only I

Answer» Correct Answer - A
779.

The structrue which does not contribute to the breathing movements in mamals sA. ribB. larynxC. diaphragmD. intercostal muscles

Answer» Correct Answer - B
780.

What is the medium of transport for `O_(2) and CO_(2)` ?

Answer» Correct Answer - Blood
781.

What is `O_(2)` -dissociation curve ?

Answer» A graphic representation between the relationship between `pO_(2)` and percentage saturation of Hb
with `O_(2)` .
782.

What is the percentage of `O_(2)` transported in bound from ?

Answer» Correct Answer - About 97 %
783.

What is the percentage of `O_(2)` transported in dissolved form through the plasma?A. About 7%B. About 3%C. About 20-25%D. About 15%

Answer» Correct Answer - B
784.

During transport of `CO_(2)`, blood does not becom due to A. Neutralisation of `H_(2)CO_(3)" by "Na_(2)CO_(3)`B. Absorption by leucocytesC. Blood buffersD. Non-accumulation

Answer» Correct Answer - C
During transport of `CO_(2)`, blood km not become acidic due to blood buffers.
785.

At the time of inspiration, the diaphragmA. ExpandsB. ContractsC. RelaxesD. Does not undergo any change

Answer» Correct Answer - B
At the time of inspiration, the diaphragm contracts.Â
786.

Vital capacity of lungs is A. 4.5-5.5 lB. 3.5-4.5 lC. 2.5-3.9 lD. 1.5-2.5 I

Answer» Correct Answer - B
Vital capacity of lungs is 3.5-4.5 L.
787.

`CO_(2)` concentration is A. More in expired air than in alveolar airB. More in alveolar air than in expired airC. More in inspired air than in alveolar airD. More in inspired air than in expired air

Answer» Correct Answer - B
The percentage of `O_(2)` in inspired air is 21 % (20.9%) while in expired air it is 1600.
`CO_(2)` content in atmosphere is 0.04% while in expired air it is 4.5%. In alveolar air, `CO_(2) is 6% O_(2) is 14%" and "N_(2)` is 80%.
788.

 Inner/ahzleolar surface area of human lungs is A. `1 m^(2)`B. `10 m^(2)`C. `100 m^(2)`D. `1000 m^(2)`

Answer» Correct Answer - C
 Inner/ alveolar surface area of human lungs is `100 m^(2)`.Â
789.

Arrange the following in the order of increasing volume 1) Tidal volume 2) Redidual volume 3) Expiratory reserve volume 4) Vital capacityA. 1lt2lt3lt4B. 1lt4lt3lt2C. 1lt3lt2lt4D. 1lt4lt2lt3

Answer» Correct Answer - C
See Answer for Q.55 from topic-2
1. Tidal volume lt 3. Expiratory reserve volume lt 2. Residual volume lt 4. Vital capacity
790.

The process of oxidation of glucose during which `CO_(2), H_(2)O` and energy are produced is known asA. BreathingB. InspirationC. RespiratonD. Expiration

Answer» Correct Answer - C
791.

A large proportion of oxygen is left unused the human blood even after its uptake by the body tissue. This `O_(2)`A. Helps in releasing more `O_(2)` to the epithelium tissuesB. Acts as a reserve during muscular exerciseC. Raises the `pCO_(2)` of blood to 75 mm of HgD. Is enough to keep oxyhaemoglobin saturation at 96%

Answer» Correct Answer - b
our tissues are able to utilise only 25 % of `O_(2)` carried bt artetrial blood. Our venous blood is still 75 % saturated with `O_(2)` . This `O_(2)` acts as a resebve during muscular exercise.
792.

The two waste products of oxidation in cells areA. `CO_(2) " and " N_(2)`B. C and OC. `CO_(2)` and waterD. Water and `N_(2)`

Answer» Correct Answer - c
Respiration is the process of xodation by which food material are oxidized and produce `CO_(2)` and water as waste exercise.
793.

Oxygen carrying capacity of blood is reduced byA. `CO_(2)`B. COC. `SO_(2)`D. `O_(3)`

Answer» Correct Answer - B
CO is a poisonous gas which binds with Hb more rapidly than `O_(2)` to form carboxyhaemoglobin.
CO makes the most stable combination with the Hb of blood. CO has 200-250 times more affinity for Hb as compared to `O_(2)`.
When inhaled air contains CO gas then persoii suffers from suffocation because product cannot dissociate so decreases free oxygen.
794.

Amount of oxygen present in one gram of haemoglobin isA. 20 mlB. 1.340 mlC. 13.4 mlD. none of the above

Answer» Correct Answer - B
795.

Amount of oxygen present in one gram of haemoglobin isA. 1.34mLB. 13.4 mLC. 134 mLD. 20 mL

Answer» Correct Answer - A
796.

`CO_(2)` is carried in blood asA. sodium bicarbonateB. sodium carbonateC. potassium carboateD. magnesium carbonate

Answer» Correct Answer - A
797.

Bicarbonate ion is produced insideA. LymphocytesB. NeutrophilC. BasophilD. RBCs

Answer» Correct Answer - D
798.

Bicarbonate ions are genergated inA. RBCsB. basphilC. neutrophilD. lymphocytes

Answer» Correct Answer - A
799.

Respiratory pigment in cockroach isA. HarmozionB. haemocyaninC. HaemoglobinD. Absent

Answer» Correct Answer - d
Haemolympy is found in insect blood which is colourless.
800.

The process by which chloride ions pass into R.B.C. and bicarbonate ions pass out is calledA. bicarbonate shiftB. chloride shiftC. buffer shiftD. enezyme shift

Answer» Correct Answer - B