What is Respiration MCQs Quiz Online Tests pdf Download

Practice what is respiration MCQs, biology MCQ for online test prep. Respiration in biology quiz has multiple choice questions (MCQ), what is respiration quiz questions and answers as air pressure in thorax increases in, answer key with choices as anaerobic respiration, inspiration, expiration and all of these for competitive exam prep. Free study guide is to learn what is respiration quiz online 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 these


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. diaphragm relaxes and arches upwards
  2. air enters 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