Tasting involves many different cell-signaling processes that ultimately generate nerve signals transduced by membrane depolarization. Sweet tastes result in PIP2 hydrolysis, while salty tastes allow sodium ions to directly alter the membrane potential. What can you deduce about the signaling mechanisms for sweet and salty?

Choose one or more:

A. Sweet ligands bind to and close sodium channels, which starts a membrane potential.
B. Sodium ions directly enter the cells, indicating the signal is transduced by an ion channel.
C. Sweet and salty signaling pathways use the same taste receptor molecule, but with different efficacy on the sweet and salty taste center in the brain.
D. Sweet utilizes the GPCR signaling pathway, activating phospholipase C.

B.  Sodium ions directly enter the cells, indicating the signal is transduced by an ion channel.

D. Sweet utilizes the GPCR signaling pathway, activating phospholipase C.

Explanation:

The taste received by the taste buds is processed through different channels

a)The Sweet, bitter, and umami tastes  are transduced by the GPCR (G-protein-coupled receptors) signaling pathway

b)Sour taste reaches the taste bud through the acidification of acid-sensitive membrane proteins with in the taste cell

c)The epithelial sodium channels in the renal tissues directly takes up the salty taste

Hence, option B and D are correct

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false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: