CBSE
Multiple Choice QuestionsThe function of surfactant is/are
facilitating lung expansion
maintaining the stable size of the alveoli
to reduce the surface tension on the alveoli
all of the above
Assertion : Excess of nitrates in drinking water are harmful for infants.
Reason : Nitrates are responsible for blue baby syndrome.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false
Assertion : Severe Acute Respiratory Syndrome (SARS) originated in China.
Reason : China is the most populated country of the world.
If both Assertion and Reason are true and the reason is the correct explanation of the assertion
If both Assertion and Reason are true but the reason is not the correct explanation of the assertion
If Assertion is true statement but Reason is false
If both Assertion and Reason are false statements
Chemosensitive area of respiratory centre in medulla is affected by
less CO2 and H+ ions
less O2 and H+ ions
excess CO2 and H+ ions
excess O2 and H+ ions
Select the correct statement.
Particulate matter of size 10 um can create severe damage to the lungs.
Particulate matter of size greater than 2.5 µm can get trapped in lungs and cause problems.
Particulate matter of size less than 2.5 µm penetrate deep into lungs.
None of the above.
Which of the following statements is incorrect regarding fermentation
Propionibacterium is used to ferment the cheese.
The puffed-up appearance of dough is due to the production of CO2 gas.
Fermentation in muscle produces ethanol.
Toddy is made by fermenting sap from palms.
Respiration is controlled by
medulla oblongata
cerebellum
hypothalamus
cerebrum
The process by which chloride ions pass into RBC and bicarbonate ions pass out is called
bicarbonate shift
Chloride shift
buffer system
enzyme shift
Assertion : Emphysema is a chronic disorder in which alveolar walls are damaged.
Reason : Emphysema is closely related to cigarette smoking.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false
If both assertion and reason are false.
Assertion: Ciliated epithelium is present in the inner lining of trachea and large bronchi.
Reason: Ciliary movement propel the mucus and foreign particle towards the larynx.
If both assertion and reason are true and reason is the correct explanation of assertion
If both assertion and reason are true but reason is not the correct explanation of assertion
If assertion is true but reason is false
If both assertion and reason are false.
