What is Respiration MCQs Quiz Online PDF Download

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IGCSE biology practice test MCQ: air pressure in thorax increases in with choices anaerobic respiration, inspiration, expiration and all of the above with online sample interview questions and answers, competitive tests preparation for jobs hiring. Free study guide is for online learning what is respiration quiz test with MCQs to practice test questions with answers.

MCQs on What is Respiration Quiz 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