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Histamine H1 receptor: Quiz


Question 1: The H1 receptor is linked to an intracellular ________ (Gq) that activates phospholipase C and the phosphatidylinositol (PIP2) signaling pathway.
Ras (protein)Plasma membrane Ca2+ ATPaseGTPaseG protein

Question 2: In the cortex, activation of H1 receptors leads to inhibition of cell membrane ________.
Ion channelLigand-gated ion channelSodium channelPotassium channel

Question 3: Histamine H1 receptors are activated by endogenous histamine, which is released by neurons that have their cell bodies in the tuberomamillary nucleus of the ________.
Pituitary glandPineal glandPosterior pituitaryHypothalamus

Question 4: The H1 receptor is a histamine receptor belonging to the family of ________.
Receptor (biochemistry)Olfactory receptorMembrane receptorG protein-coupled receptor

Question 5: This receptor which is activated by the biogenic amine histamine is expressed throughout the body, specifically in smooth muscles, on vascular endothelial cells, in the heart, and in the ________.
White matterNeuronGrey matterCentral nervous system


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