Checked by:_______________ Rechecked by:_____________ Sign Invigilator:_____________
Q.1 Circle the correct answer. (10)
1.In human the process which occurs in Alveoli?
a) Reproduction b) Gaseous exchange c) Nutrition d) Transport
2.The majority of people diagnosed with chronic bronchitis are ___________ years of age or older?
a) 15 b) 25 c) 35 d) 45
3.Which gas reduces the oxygen carrying capacity of haemoglobin?
a) Carbon dioxde b) Carbon Monoxide c) Oxygen d) Nitrogen
4.Which gas is absorbed through stomata of plants during night?
a) carbon dioxide b) nitrogen c) oxygen d) hydrogen
5.A thick muscular layer beneath lungs is called _____________ ?
a) Kidney b) Diaphragm c) Bladder d) Ureter
6.Most of the gaseous exchange in a leaf occurs through?
a) Stomata b) General surface c) Cuticle d) Lenticels
7.Where does the gaseous exchange occur in humans?
a) Pharynx b) Trachea c) Bronchi d) Alveoli
8.Total chemicals in tobacco in smoke are?
a) 1000 b) 2000 c) 3000 d) 4000
9.The primary chemical stemulus for breathing in the concentration of _______________ in blood?
a) carbon dioxide b) oxygen c) nitrogen d) hydrogen
10.Taking on oxygen and giving out of carbon dioxide is called _______________ ?
a) Aerobic Respiration b) Anaerobic Respiration c) Gaseous Respiration d) Respiration
Q.2 Write short answers to these questions: (15 )
1.Define oxygenated blood?
2.Write two symptoms of Emphysema?
5.What are the modes of gaseous exchange in plants? Just give the names?