Respiration: The biochemical process in which the readymade source of energy, i.e., glucose is oxidised or broken down to liberate energy.
ATP (adenosine triphosphate): The energy currency of the cell which acts as the immediate source of energy to carry out various life activities.
Aerobic respiration: The breakdown of glucose into carbon dioxide and water inside the cells by using oxygen to release energy.
Aerobes: Organisms that use oxygen for respiration.
Anaerobic respiration: The incomplete breakdown of glucose without the use of oxygen, yielding ethyl alcohol, carbon dioxide, and a small amount of energy.
Anaerobes: Animals and plants that can survive and obtain energy even in the absence of oxygen.
Lactic acid fermentation: The breakdown of glucose in the deficiency of oxygen in the muscles.
Fermentation: In yeast, the anaerobic respiration process which involves the breakdown of sugars into alcohol and carbon dioxide.
Breathing: A physical or mechanical process associated with the exchange of respiratory gases (
and
) between the atmosphere and the organism.
Cellular respiration: A biochemical process taking place with the help of enzymes inside the cell, involving the oxidation of glucose and release of energy.
Stomata: Tiny pores on leaves and young stems that open into air cavities to allow gaseous exchange.
Lenticels: Gaseous exchange structures that develop below the bark in old woody stems.
Photosynthesis: An endergonic process occurring in chloroplasts during the daytime where glucose is synthesised from carbon dioxide and water using solar energy.
Lactic acid: The end-product of anaerobic respiration in a muscle cell.
Exergonic reaction: A chemical or biochemical reaction, such as respiration, in which energy is produced or released.