Examlex
_____ characteristics are those aspects of physiology that are necessary for sexual reproduction, such as the organs for the production of sperm or eggs.
Antibody
A protein produced by the immune system that recognizes and binds to specific foreign substances, such as pathogens, to help neutralize or destroy them.
Virus
A virus is a microscopic infectious agent that replicates only inside the living cells of other organisms, potentially causing disease.
Allergic Reaction
An allergic reaction is an immune system response to a usually harmless substance, resulting in symptoms ranging from mild irritation to severe anaphylaxis.
Allergen
A substance that can cause an allergic reaction by stimulating the immune response in susceptible individuals.
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Q47: The _ model suggests that the brain