Final answer:
The systemic toxin described is a neurotoxin. b)Neurotoxins are types of exotoxins that are protein-based, highly specific in their action, and not heat stable.
Step-by-step explanation:
The toxin described, which has systemic effects rather than local, is characterized by being composed mostly of protein, having high toxicity, and by being not heat stable.
Considering the fact that exotoxins are protein molecules produced by pathogens, are specific in their action,
and are heat labile which makes them denature at temperatures above 41 °C (106 °F). Based on these characteristics, the correct answer is: b) Neurotoxins.
Endotoxins, in contrast, are associated with a general systemic inflammatory response, are stable at high temperatures, and are part of the lipid A component of the lipopolysaccharides (LPS) on the outer membrane of gram-negative bacteria.
Neurotoxins disrupt normal nerve function, and an example such as botulinum toxin targets specific cells to exert its toxic effects, which aligns with the described characteristics of the toxin in question—highly potent and protein-based affecting the liver cells systemically.