What Would Happen If the G-Protein Coupled Receptor in Heart

question 17

Multiple Choice

What would happen if the G-protein coupled receptor in heart cells that binds to ACh had a mutation that caused it to bind more tightly to the G-protein alpha subunit?

• A)G-protein activation and K+ channel opening would happen more quickly.Heart rate may remain abnormally low,impairing response to stress.
• B)This would lead to K+ flow out of heart cells,causing increased hyperpolarization.
• C)G-protein activation and K+ channel opening would be slowed.Heart rate may remain abnormally high,especially following stress.
• D)This would lead to K+ flow into heart cells,causing increased depolarization.

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Apply concepts of virulence evolution to understand its dynamics in different host population structures.

Explain the dynamics of mutualism and how they can shift towards antagonism.

Conceptualize the environmental basis of genetic trait advantages, such as toxin tolerance in predators.

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