21. Larynx open into pharynx by

A Gullet
B Glottis
C Epiglottis
D None of the above
Answer :   Glottis
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22. How oxygen enters in blood from alveoli of lungs

A Pressure of CO2
B Simple diffusion
C By Hb
D None of the above
Answer :   Simple diffusion
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23. Residual air mostly occurs in

A Alveoli
B Bronchus
C Nostrils
D Trachea
Answer :   Alveoli
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24. Dissociation curve shifts to the when

A CO2 concentration decreases
B CO2 concentration increases
C O2 concentration decreases
D Noneof the above
Answer :   CO2 concentration increases
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25. Expiratory muscles contract at the time of

A Deep inspiration
B Normal inspiration and expiration
C Forceful expiration
D X-rays
Answer :   Forceful expiration
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26. In the process of transport of CO2 which phenomenon occurs between RBSs and plasma

A Osmosis
B Adsorption
C Chloride shift
D Absorption
Answer :   Chloride shift
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27. 'Body tissues obtain O2 from haemoglobin because of its dissociation in tissues caused by

A Low oxygen concentration and high CO2 concentration
B High O2 concentration
C Low CO2 concentration
D Pterygoid
Answer :   Low oxygen concentration and high CO2 concentration
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28. Wall of alveoli is composed of

A Simple squamous epithelium
B Simple cuboidal epithelium
C Pseudostratified epithelium
D Simple columnar epithelium
Answer :   Simple squamous epithelium
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29. Pneumotaxic centre is present in

A Pons
B Medulla
C Cerebrum
D Skull of frog
Answer :   Pons
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30. Vocal cords are attached with

A Cricoid
B Arytenoid
C Thyroid and arytenoid(
D Turgor pressure
Answer :   Thyroid and arytenoid(
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