Examlex
A person has his/her gall bladder removed and as a result ________.
Neurotransmitter
Chemical substances in the nervous system that transmit signals between neurons or from neurons to muscles.
Exogenous
Originating from outside an organism or system; external factors or influences that are not produced within an organism.
Agonist
An agonist is a chemical or drug that binds to receptors in the brain and causes a stimulatory effect.
Antagonist
A substance that acts against and blocks an action, often referring to a drug that binds to a receptor in a cell and prevents a response in the presence of an agonist.
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