MCQ ON REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM class 11 for NEET | REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM class 11| MCQ REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM with Answer | Check the below NCERT MCQ question for class 11Biology based on the with Answers.
MCQ on REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM class 11Biology with answers were prepared based on the latest pattern.We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.
MCQ ON REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM class 11 for NEET
MCQ ON REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024 ,2025
INTRODUCTION:-
REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM.
Human beings have a significant ability to maintain and moderate the respiratory rhythm to suit the demands of the body tissues.
This is done by the neural system. Specialised centre present in the medulla region of the brain called respiratory rhythm center is primarily responsible for this regulation.
Another center present in the pons region of the brain called pneumotaxic centre can moderate the functions of respiratory rhythm centre. Neural signal from the centre can reduce the duration of inspiration and thereby altered respiratory rate.
Disorders of respiratory systems:-
Asthma:-it is difficulty in breathing of causing wheezing due to inflammation of bronchi and bronchioles.
Emphysema:- It is a chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased.
TRANSPORT OF GASES:-
Blood is the medium of transport for Oxygen and Carbon dioxide. About 97% of oxygen is transported by RBC in the blood. The remaining 3% of oxygen is carried in a dissolve state through the plasma. Nearly 20 to 25% of carbon dioxide is transported by RBCs where is 20% of it is carried as bicarbonate. About 7% of carbon dioxide is carried in a dissolve state through plasma.
TRANSPORT OF OXYGEN :-
Hemoglobin is red color iron containing pigment present in the RBCs. Oxygen can bind with hemoglobin in reversible manners to form oxyhemoglobin. Each hemoglobin molecule can carry a maximum of for molecules of oxygen. Binding of oxygen with hemoglobin is primarily related to partial pressure of oxygen molecule.
Partial pressure of carbon dioxide, hydrogen ions concentration, and temperature are the orther factors which can interfere with this binding.
Sigmoid curve is obtained when percentage saturation of hemoglobin with oxygen is plotted against the pO2.This curve is called the oxygen dissociation curve .
And is highly useful in studying the effect of factors like pressure of carbon dioxide hydrogen ions concentration on binding of oxygen molecule with hemoglobin.
TRANSPORT OF CARBON DIOXIDE:-
Carbon dioxide is carried by hemoglobin as Carbamino-haemoglobin . This binding is related to the partial pressure of carbon dioxide.
po2 is a major factor which could affect this binding. When pco2 is high and po2 is low as in tissues, more binding of Carbon dioxide occurs whereas , when the pco2 is low and po2 is high as in the alveoli, dissociation of CO2 from carbamino-haemoglobin takes place.
MCQ REGULATION OF RESPIRATION AND DISORDERS OF RESPIRATORY SYSTEM class 11 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024,2025
1. Human beings have a significant ability to maintain and moderate the respiratory rhythm to suits the demands of the body tissues. This is done by the
(a) neural system
(b) physiology
(c) myogenic system
(d) large intestine
Ans (a) neural system
2. Specialised for respiratory rhythm centre is
(a) medulla region
(b) cerebrum
(c) cerebellum
(d) spinal cord
Ans. (a) medulla region
3. Another centre present in the ponus region of the brain can moderate the function of the respiratory rhythm centre.
(a) pneumotaxic centre
(b) cerebellum
(c) association centre
(d) Corpus callosum
Ans. (a) pneumotaxic centre
4. A……………are is situated adjacent to the rhythm centre which is highly sensitive to CO2 and hydrogen ions.
(a) chemosensitive area
(b) olfactory centre
(c) optic nerve centre
(d) visual sites
Ans.(a) chemosensitive area
5. It is difficulty in breathing causing wheezing due to inflammation of bronchi and bronchioles
(a) Asthma
(b) Emphysema
(c) silicosis
(d) all the above
Ans.(a) Asthma
6. A chronic disorder in which alveolar walls are damaged due to which respiratory surface is decreased.
(a) Asthma
(b) Emphysema
(c) silicosis
(d) pneumonia
Ans.(b) Emphysema
7. One of the main cause of Emphysema is
(a) chewing tobacco
(b) cigarette smoking
(c) drugs
(d) alcohol
Ans.(b) Cigarette smoking
8. Emphysema is a chronic disorder in which…….are damaged.
(a) alveolar walls
(b) heart
(c) spleen
(d) bones
Ans.(a) alveolar walls
9. Long exposure to dust can give arise to inflammation leading to
(a) fibrosis
(b) silicosis
(c) emphysema
(d) all the above
Ans. (a) fibrosis
10. Fibrosis can causing serious damaged to…..
(a) lung
(b) heart
(c) liver
(d) all the above
Ans. (a) lung
11. A pneumotaxic centre is present in the
(a) medulla region of the brain
(b) pons region of the brain
(c) cerebellum
(d) all the above
Ans.(b) pons region of the brain
12. A chemosensitive area is present in the ………..after respiratory mechanism.
a) medulla
b) cerebellum
c) cerebrum
(d) optic nerve
Ans . (a) medulla
13.Which is the occupational respiratory disorders ?
(a) emphysema
(b) fibrosis
(c) asthma
(d) plasma
Ans.(b) fibrosis
14. Proliferation of fibrous tissue can cause
(a) fibrosis
(b) silicosis
(c) emphysema
(d) Asthma
Ans. (a) fibrosis
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15. The role of oxygen in the regulation of respiratory rhythm is quite
(a) significant
(b) insignificant
(c) meaningful
(d) all the above
Ans.(b) insignificant
16. Receptors associated with aortic arch and ……….also can recognise change in carbon dioxide and hydrogen ions concentration and send necessary signals to the rhythm centre for remedial actions.
(a) carotid arch
(b) pneumotaxic centre
(c) medulla
(d) all the above
Ans.(a) carotid arch
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