Extracellular Messengers Binding on Surface Receptors May Exert Effects on Cells

question 64

Multiple Choice

Extracellular messengers binding on surface receptors may exert effects on cells via all the following means, except:

• A) opening gated channels.
• B) opening a gated channel through activation of a G protein.
• C) activation of the adenylyl cyclase system.
• D) binding to sites and then being endocytized.
• E) ultimately activating protein kinases.

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