_____ are lipopolysaccharide components of the membrane of Gram-negative bacteria that are heat stable and very toxic.

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Multiple Choice

_____ are lipopolysaccharide components of the membrane of Gram-negative bacteria that are heat stable and very toxic.

Explanation:
Endotoxins are lipopolysaccharide components of the outer membrane of Gram-negative bacteria that are heat-stable and very toxic. The toxic part, lipid A, sits in the membrane and, when released, triggers a powerful inflammatory response through immune receptors, leading to fever, hypotension, and potentially septic shock. This stability contrasts with exotoxins, which are secreted protein toxins and are typically heat-labile. Pyrogens describe fever-causing substances, and endotoxins are classic bacterial pyrogens, but the description here points specifically to the lipopolysaccharide portion. Lipoproteins are structural membrane components and are not toxins.

Endotoxins are lipopolysaccharide components of the outer membrane of Gram-negative bacteria that are heat-stable and very toxic. The toxic part, lipid A, sits in the membrane and, when released, triggers a powerful inflammatory response through immune receptors, leading to fever, hypotension, and potentially septic shock. This stability contrasts with exotoxins, which are secreted protein toxins and are typically heat-labile. Pyrogens describe fever-causing substances, and endotoxins are classic bacterial pyrogens, but the description here points specifically to the lipopolysaccharide portion. Lipoproteins are structural membrane components and are not toxins.

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