1. : a class of immunoglobulins that include the most common antibodies circulating in the blood, that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus.2. a class of immunoglobulins including the most common antibodies circulating in the blood that facilitate the phagocytic destruction of microorganisms foreign to the body, that bind to and activate complement, and that are the only immunoglobulins to cross over the placenta from mother to fetus.
Not to be confused with Lactic acid fermentation. Anaerobic respiration is a form of respiration using electron acceptors other than oxygen. Although oxygen is not used as the final electron acceptor, the process still uses a respiratory electron transport chain; it is respiration without oxygen.In order for the electron transport chain to function, an exogenous final electron acceptor must be present to allow electrons to pass through the system.n aerobic organisms, this final electron acceptor is oxygen. Molecular oxygen is a highly oxidizing agent and, therefore, is an excellent acceptor. In anaerobes, other less-oxidizing substances such as sulfate (SO 4 2â), nitrate (NO 3 â), sulphur (S), or fumarate are used.
If oxygen does not get to the muscles fast enough for aerobic respiration, the muscles change to anaerobic respiration by processing only the first stage of glucose breakdown and making lactic acid instead. Glucose (sugar) only = carbon dioxide + lactic acid + some energy.In anaerobic respiration only the first stage of sugar breakdown occurs. Lactic acid builds up in the muscles and stops them working. The person breathes faster to take in more oxygen so that lactic acid can be broken down to carbon dioxide and water.his is called anaerobic respiration. Oxygen is needed to full break down the glucose and release all the energy stored in it. In anaerobic respiration glucose cannot be fully broken down and only a small amount of energy is released. Lactic acid stops muscle from working if it builds up.