Ch. 14 - Psychological Disorders

Question 1

Antagonist

Answer 1

-A drug that blocks a neurotransmitter

Question 2

Agonist

Answer 2

-A drug that mimics or increases the effects of a neurotransmitter

Question 3

Affinity

Answer 3

-A drug has an affinity for a receptor if it binds to it, like a key in a lock

Question 4

Efficacy

Answer 4

• A drug’s tendency to activate the receptor

- A drug that binds to a receptor but fails to stimulate it, has a high affinity, but a low efficacy

Question 5

Tolerance

Answer 5

-As an addiction develops, many of its effects, especially the enjoyable effects, decrease. That decrease is called TOLERANCE

Question 6

Withdrawal

Answer 6

-As the body comes to expect the drug under certain circumstances, it reacts strongly when the drug is absent. That reaction is called WITHDRAWAL