Respiration in Oganisms

During heavy physical exercise, the breathing rate of a person slows down. True/False?

• True

• False

__(i)__ respiration occurs in the presence of oxygen. In this process, the food is completely oxidised into __(ii)__ and water.

Select the correct option for (i) and (ii) respectively.

• Aerobic, Carbon dioxide

• Anaerobic, Ethanol

• Aerobic, Ethanol

• Anaerobic, Carbon dioxide

In muscle cells, the end product of anaerobic respiration is

• carbon dioxide

• lactic acid

• ethanol

• water

In humans, breathing rate is fastest during

• running

• walking

• sleeping

• talking

Breathing involves inhalation and exhalation processes. During inhalation, ribs moves

• downward and outward

• upward and inward

• downward and inward

• upward and outward

Which of the following organisms respires through tracheal system?

• Earthworm

• Cockroach

• Fish

• Frog

Which of the following organs are parts of human respiratory system?

I. Pharynx

II. Nostrils

III. Gullet

IV. Wind pipe

V. Lungs

• II and V only

• II, IV and V only

• I, II, IV and V only

• All of the above

Which of the following statements is incorrect?

• As a result of sneezing, unwanted particles are thrown out of the body.

• Trachea are divided into two bronchi which enter into respective lungs.

• The alveoli of lungs are not supplied with blood vessels.

• Breathing rate does not remain the same under all conditions.

Which of these is not true about cellular respiration?

• It releases energy.

• It occurs only during the day.

• It utilizes oxygen and liberates carbon dioxide.

• It occurs in most plants and animals.

Gaseous exchange in fish and earthworm occurs respectively through

• gills and spiracles

• lungs and gills

• gills and skin

• lungs in both