IGCSE O Level Biology Online Tests
What is Respiration MCQ (Multiple Choice Questions) PDF Download
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The MCQ: Blood entering the lungs contain very; "What is Respiration" App Download (Free) with answers: Little oxygen (O2) only; High carbon dioxide (CO2) only; Low carbon dioxide (CO2); Little oxygen (O2) and high carbon dioxide (CO2); to study e-learning courses. Practice What is Respiration Quiz Questions, download Google eBook (Free Sample) for online college courses.
What is Respiration MCQs: Questions and Answers PDF Download
Air pressure in thorax increases in
- anaerobic respiration
- inspiration
- expiration
- digestion
Blood entering the lungs contain very
- little oxygen (O2) only
- high carbon dioxide (CO2) only
- low carbon dioxide (CO2)
- little oxygen (O2) and high carbon dioxide (CO2)
In expiration in process of respiration
- the diaphragm relaxes and arches upwards
- air enters the lungs
- ribs move upwards
- sternum moves up and away from backbone
Stimulus for breathing is
- lack of oxygen in blood
- excess of carbon dioxide in blood
- contraction of alveoli
- diaphragm movements
In anaerobic respiration (without O2) in mammals, the wastes are
- water
- ethanol
- lactic acid
- carbon dioxide
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