Respuesta :
The correct answer is option (A.) mitochondria
If a cell is exposed to cyanide, most of the cyanide will be found within the mitochondria.
Heme-containing proteins include Fe3+, which cyanide binds to. As a result, the electron transport chain's terminal cytochrome complex IV is inhibited. Cyanide's blockade of complex IV depletes ATP, which leads to cell death. Cytochrome a3 that has been reduced cannot be reoxidized by oxygen. As a result, both cellular respiration and ATP generation are hindered, effectively depriving the cells, tissues, and ultimately the entire body of oxygen. Reduced oxygen saturation and metabolic acidosis develop as a result of hypoxia. The severity of cyanide poisoning is indicated by the degree of lactic acidosis. Plasma lactate is a sign of cyanide poisoning in a collapsed person. Up to 98% of the cyanide in the bloodstream in cases of severe cyanide poisoning is securely attached to red blood cells.
Myocardial depression and a decrease in cardiac output are the secondary responses. The development of VF and cardiovascular collapse follows bradycardia, hypotension, and cardiac arrhythmia.
The autonomic shock brought on by the production of biogenic amines plays a part in severe cyanide poisoning. The observed shock-like state is not due to cytochrome oxidase inhibition, but rather to coronary artery vasoconstriction, which increases central venous pressure. Rhodanese in the liver converts CN to thiocyanate, which is eliminated in the urine.
The complete question is:
Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the
a. mitochondria.
b. ribosomes.
c. peroxisomes.
d. Lysosomes.
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