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question 41

Multiple Choice

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Definitions:

Antagonist

A molecule that binds to a receptor but does not activate it, thereby blocking action of agonist molecules or inhibiting the function of an enzyme.

Curare

A plant extract used by South American indigenous peoples on arrows and darts for hunting, which acts as a muscle relaxant by blocking neurotransmission.

Physostigmine

Physostigmine is a reversible cholinesterase inhibitor used medically to increase acetylcholine levels in the treatment of certain disorders, such as glaucoma and myasthenia gravis.

Poison Arrowheads

Historical weapons used for hunting and warfare, often coated with natural toxins to incapacitate or kill the target.