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Human Respiration MCQ App Download - IGCSE O Level Biology PDF e-Book

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What is Respiration MCQ (Multiple Choice Questions) PDF Download

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The MCQ: Air pressure in thorax increases in "What is Respiration" App Download [Free] with answers: anaerobic respiration, inspiration, expiration, and digestion to learn online courses. Practice What is Respiration Quiz Questions, download Apple e-Book (Free Sample) for ACT prep classes.

What is Respiration Questions and Answers PDF Download

MCQ: 1

Air pressure in thorax increases in

  1. anaerobic respiration
  2. inspiration
  3. expiration
  4. digestion
MCQ: 2

Blood entering the lungs contain very

  1. little oxygen (O2) only
  2. high carbon dioxide (CO2) only
  3. low carbon dioxide (CO2)
  4. little oxygen (O2) and high carbon dioxide (CO2)
MCQ: 3

In expiration in process of respiration

  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: 4

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: 5

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

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

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