in the marine mollusk, aplysia, serotonin binds to a g-protein-coupled receptor and activates a g s subunit. the resulting activation of pka leads to phosphorylation and closure of k channels. what effect would this have on the cell?

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26-10-2022
Biology

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in the marine mollusk, aplysia, serotonin binds to a g-protein-coupled receptor and activates a g s subunit. the resulting activation of pka leads to phosphorylation and closure of k channels. what effect would this have on the cell?

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qwsparrow qwsparrow · Answer 1 · 2022-10-28T12:32:29-04:00

In the marine mollusk, aplysia, serotonin binds to a g-protein-coupled receptor and activates a gs sub-unit. The resulting activation of PKA leads to phosphorylation and closure of k channels. This results in decreased K+ efflux, depolarizing the cell.

A tremendously diversified group of animals, Mollusca (or mollusks), has at least 85,000 different species that are still alive. With around 23% of all known marine species, mollusks are the largest marine phylum. Clams, scallops, oysters, mussels, limpets, chitons, and snails are all examples of mollusks; snails are gastropods and makeup around 80% of the species of invertebrate. Mollusks known as cephalopods include nautilus, squid, cuttlefish, and octopuses.

Some features of mollusks are:

All mollusks have soft, unsegmented bodies with "head" and "foot" regions.
They have hard exoskeletons covering their bodies, such as the plates of chitons or the shells of snails and clams
Many have calcareous or protein- and chitin-based shells
The majority of mollusks have eyes
The mantle of mollusks has a body cavity (used for breathing and excretion) and a radula (something tongue-like).
All mollusk eggs hatch into larvae or tiny adults
All mollusk larvae have neurological systems, circulatory systems, and frequently complicated digestive systems.

One of the main kinds of cell surface receptors, G protein-coupled receptors (GPCRs), are connected to a family of G proteins made up of the alpha, beta, and gamma subunits.

Learn more about mollusks and g-protein-coupled receptors here: https://brainly.com/question/14960132

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