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Questions and Answers
Which of the following statements about histamine is true?
Which of the following statements about histamine is true?
- Histamine is not a neurotransmitter
- Histamine is recognized as a neurotransmitter (correct)
- Histamine receptors are only found in the brain
- Histamine receptors are not blocked by antihistamines
What is the main reason drowsiness-inducing antihistamines cause drowsiness?
What is the main reason drowsiness-inducing antihistamines cause drowsiness?
- They block histamine receptors (correct)
- They increase histamine production
- They decrease histamine receptor availability
- They have a sedative effect on the brain
Why do non-drowsy formulations of antihistamines not cause drowsiness?
Why do non-drowsy formulations of antihistamines not cause drowsiness?
- They do not block histamine receptors (correct)
- They increase histamine production
- They have a stimulant effect on the brain
- They decrease histamine receptor availability
