An Example of Convergent Signaling Mediated by Indirectly Coupled Receptors

question 4

Multiple Choice

An example of convergent signaling mediated by indirectly coupled receptors is…

• A) Phospholipase C cleaving PIP₂ to generate both DAG and IP₃.
• B) GABA and Norepinephrine receptors both using G proteins to mediate signaling.
• C) Muscarinic receptors in guinea pig sympathetic neurons that can affect five different potassium currents.
• D) GABA receptor activation of both G_i and G_o proteins that leads to the opening of potassium channels and the closing of calcium channels.
• E) A rat superior cervical sympathetic neuron modulated by multiple transmitters acting through many different G protein-coupled pathways that influence several types of ion channels.

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Definitions:

Mesa

A landform characterized by a flat-topped mountain or hill, typically with steep sides, found in arid and semi-arid regions.

Shield

A large, relatively flat expanse of ancient, Precambrian igneous and metamorphic rocks that form the stable continental core.

Well-developed Soils

Soils that have undergone extensive formation processes, exhibiting strong structural characteristics and distinct horizons or layers.

Unweathered Lava

Refers to lava that has been recently erupted and has not been altered by weathering processes.