RESPIRATION
1. At 20°C (most favourable condition) the frog respires through
a. Pulmonary respiration b. Cutaneous respiration
c.Buccopharyngeal respiration d. All of the above
2. Anaerobic respiration is like to occur in
a. ants b. earthworms c. tapeworms d. echinoderms
3. Respiratory quotient is not less than one in
a. Carbohydrates b. Proteins c. Fats d. Normal diet
4. During hibernation, frog respires by
a. External gills b. Lungs and buccopharyngeal lining c. External gills and lungs d. Moist skin only
5. The lungs are protected by
a. Breast bone b. Ribs on sides c. Vertebral column d. All the three.
6. Peripatus breathes by
a. Skin b. Book Lungs c. Trachea d. Gills
7. Which structures are end part of the branch of trachea and take part in the exchange of gases?
a. Tracheoles b. Respiratory branchioles c. Terminal branchiole d. Alveoli
8. In expiration, diaphragm becomes
a. Flattened b. Relaxed c. Straightened d. Arched
9. The function of tracheal hairs is to
a. Pass mucus out b. Pass mucus in c. Pass air out d. Pass air in
10. Which of the following yields minimum number of ATP?
a. Anaerobic respiration b. Aerobic respiration c. Both are equal d. None of the above
11. The lowest value is of a. Inspiratory reserve volume
b. Expiratory reserve volume c. Vital capacity d. Tidal volume
12. Carbondioxide is carried in the blood
a. As dissolved gas b. As bicarbonates c. In combination with haemoglobic d. All of the above
13. Haemoglobin oxygen dissociation curve is
a. hyperbolic b. sigmoid c. constant d. straight
14. Carbonic anhydrase is mostly found in
a. RBC b. WBC c. Blood plasma d. Blood platelets
15. Which energy is consumed in breathing?
a. Mechanicall b. Chemical c. Bioelectricity d. Physical energy
16. Common feature of human and insect trachae is
a. Noncollapsible wall b. Supporting rings c. Ectodermal origin d. Endodermal origin
17. Air is oreathed through a. Trachea ® larynx ® larynx ® pharyns ® alveoli
b. Nose ® larynx ® phyarynx ® bronchus ® alveoli ® bronchioles
c. Nostrils ® paryns ® larynx ® trachea ® bronchi ® bronchiles ® alveoli d. Nose ® mouth ® lungs.
18. At high altitude, RBCs of human blood will
a. Increase in number b. Decrease in number c. Decrease in size d. Increase in size
19. CO2 is transported as
a. Dissolved in blood plasma b. As carbonic acid c. In carbaminohaemoglobin and carbonic acid
20. During transport of CO2 blood does not become acidic due to
a. Neutralisation of H2CO3 by Na2CO3 b. Absorption by leucocytes c. Blood buffers d. Nonaccumulation
21. Carbon monoxide greater affinity for haemoglobin as compared to oxygen
a. 1000 times b. 200 times c. 20 times d. 2 times
22. Vocal cords occur in
a. Larynx b. Pharynx c. Glottis d. Bronchial tube
23. Oxygen and carbon dioxide are transported in blood through
a. Platelets and corpuscles b. RBCs and WBCs c. WBCs and serum d. RBCs and plasma
24. About 1500 ml of air left in lungs is called
a. Tidal volume b. Inspiratory reserve volume c. Residual volume d. Vital capacity
25. Which one connects glycolysis with Krebs cycle?
a. Malic acid b. Acetyl CoA c. NADH d. ATP
26. Exchange of gases in lung alveoli occurs through
a. Active transport b. Osmosis c. Simple diffusion d. Passive transport
27. Oxygen carried in inhalation ultimately reaches
a.Bronchioles b. Bronchus c. Trachea d. Alveoli
28. An average person not doing hard work requires energy per day about
a. 2000 kcal b. 1000 kcal c. 750 kcal d.2800 kcal
29. The respiratory centres which control inspiration and expiration, are located in
a. medulla oblongata b. diencephalon c. cerebellum d. spinal cord
30. In lungs, air is separated from venous blood by
a. Squamous epithelium + tunica externa of blood vessel
b. Squamous epithelium + endothelium of blood vessel
c. Transitional epithelium + tunica media of blood vessel
d. Columnar epithelium + e layered wall of blood vessel