IGCSE Biology - Respiration and Gas
Exchange
Aerobic respiration - correct answer ✔✔The reaction in cells that releases energy from glucose using
oxygen
Anaerobic respiration - correct answer ✔✔A form of respiration that can occur without using oxygen. In
this reaction glucose is not completely broken down and less energy is released e.g. in yeast and muscle
cells
Aerobic respiration reaction - correct answer ✔✔Glucose + Oxygen react to release Carbon Dioxide +
Water (+Energy)
Oxygen debt - correct answer ✔✔The volume of oxygen needed to completely break down the lactic
acid build up produced in the body during anaerobic respiration
Lactic acid - correct answer ✔✔Produced in muscles when glucose is broken down anaerobically during
strenuous muscular activity
Ventilation - correct answer ✔✔The mechanism that moves air into and out of the lungs
Gas Exchange System - correct answer ✔✔The lungs and associated structures make up this system
Thorax - correct answer ✔✔The part of the human body between the neck and the abdomen, partially
enclosed by the ribs and containing the heart and lungs
Diaphragm - correct answer ✔✔A shallow dome-shaped, muscular partition separating the thorax from
the abdomen. Used in ventilation
Exchange
Aerobic respiration - correct answer ✔✔The reaction in cells that releases energy from glucose using
oxygen
Anaerobic respiration - correct answer ✔✔A form of respiration that can occur without using oxygen. In
this reaction glucose is not completely broken down and less energy is released e.g. in yeast and muscle
cells
Aerobic respiration reaction - correct answer ✔✔Glucose + Oxygen react to release Carbon Dioxide +
Water (+Energy)
Oxygen debt - correct answer ✔✔The volume of oxygen needed to completely break down the lactic
acid build up produced in the body during anaerobic respiration
Lactic acid - correct answer ✔✔Produced in muscles when glucose is broken down anaerobically during
strenuous muscular activity
Ventilation - correct answer ✔✔The mechanism that moves air into and out of the lungs
Gas Exchange System - correct answer ✔✔The lungs and associated structures make up this system
Thorax - correct answer ✔✔The part of the human body between the neck and the abdomen, partially
enclosed by the ribs and containing the heart and lungs
Diaphragm - correct answer ✔✔A shallow dome-shaped, muscular partition separating the thorax from
the abdomen. Used in ventilation
