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Apnea is the absence of breathing, but only for less than a few moments. If a patient has stopped breathing and does not restart breathing it is called respiratory arrest. Lack of spontaneous respiration is central apnea. Absence of spontaneous respiration means that the person's brainstem is not triggering them to take breaths. The medulla contains the respiratory center, and the respiratory center makes sure that the body is not ever breathing below 8 respirations per minute. A person with apnea is described as apneic.
Cellular Respiration is a three step process; Glycolysis, the Krebs Cycle, and the Electron Transport Chain. Effective cellular respiration is an aerobic cycle, meaning that it requires oxygen. The first step, glycolysis, is an anaerobic process, meaning it does not require oxygen. Therefore, glycolysis is always able to take place. The next step is the Krebs Cycle. This is an aerobic process and does not take place in the absence of oxygen. If there is an absence of oxygen, bodily toxins such as ethyl alcohol and lactic acid are produced and cellular respiration is not carried out. To answer your question, a lack of oxygen is what disrupts cellular respiration.
Aplasia is the medical term meaning absence of development.
Asplenia is the medical term meaning absence of the spleen.
A word meaning lasting and not temporary is "permanent."
Impromptu is the closest to spontaneous word. It is a word representing sudden action.
Athelia means absence of a nipple.
presence
Aphakia is the medical term meaning absence of the lens. This is often a result of cataract surgery.
Athelia is the medical term meaning absence of nipples.
-pnea is th medica; terminology root meaning respiration.
Aerobic respiration requires oxygen and Anaerobic respiration does not require oxygen!