What is Respiration MCQs Quiz Online PDF Download

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MCQs on What is RespirationQuiz PDF Download

MCQ: Air pressure in thorax increases in

  1. anaerobic respiration
  2. inspiration
  3. expiration
  4. all of the above


MCQ: Blood entering lungs contain

  1. very little oxygen (O2)
  2. very high carbon dioxide (CO2)
  3. vary low carbon dioxide (CO2)
  4. both A and B


MCQ: In expiration

  1. the diaphragm relaxes and arches upwards
  2. air enters the lungs
  3. ribs move upwards
  4. sternum moves up and away from backbone


MCQ: Stimulus for breathing is

  1. lack of oxygen in blood
  2. excess of carbon dioxide in blood
  3. contraction of alveoli
  4. diaphragm movements


MCQ: In anaerobic respiration (without O2) in mammals, wastes are

  1. water
  2. ethanol
  3. lactic acid
  4. carbon dioxide