Histamine Formation and Function Quiz

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Which enzyme is responsible for the formation of histamine?

Histamine decarboxylase (correct)

Histidine synthase

Histidine oxidase

Histamine dehydrogenase

Which enzyme is responsible for the breakdown of histamine?

Histidine synthase

Histamine dehydrogenase

Histidine oxidase

Diamine oxidase (correct)

Which receptor couples to G to stimulate cyclic AMP?

H2 receptor

H3 receptor

H1 receptor (correct)

H4 receptor

Which receptor couples to G to inhibit cyclic AMP accumulation?

H4 receptor Signup and view all the answers

Where are H3 receptors mainly located in the body?

Thalamus Signup and view all the answers

Which of the following cells are NOT mentioned as sites of histamine forming cells?

Thalamus Signup and view all the answers

What is the main mechanism of action for H3 receptors?

Decrease in Ach, 5-HT & NE release in CNS Signup and view all the answers

Which receptor is targeted for its anti-ulcer properties?

H2 receptors Signup and view all the answers

Which enzyme is responsible for the breakdown of histamine?

Diamine oxidase Signup and view all the answers

What is the main use of H1 receptor antagonists according to the text?

Sleep disorders (sleep inducing) Signup and view all the answers

Histamine Formation and Function Quiz

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Questions and Answers

Which enzyme is responsible for the formation of histamine?

Which enzyme is responsible for the breakdown of histamine?

Which receptor couples to G to stimulate cyclic AMP?

Which receptor couples to G to inhibit cyclic AMP accumulation?

Where are H3 receptors mainly located in the body?

Which of the following cells are NOT mentioned as sites of histamine forming cells?

What is the main mechanism of action for H3 receptors?

Which receptor is targeted for its anti-ulcer properties?

Which enzyme is responsible for the breakdown of histamine?

What is the main use of H1 receptor antagonists according to the text?

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