2
Question
In heart cells, which one serves as a second messenger, speeding up muscle cell contraction in response to adrenaline?
In heart cells, which one serves as a second messenger, speeding up muscle cell contraction in response to adrenaline?
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Solution
The correct option is B cAMP
There are many hormones which bind to receptors and then activate a pathway. This pathway uses second messengers like a cyclic form of adenosine monophosphate (cAMP). Adrenaline is the hormone which uses cAMP as the secondary messenger that activates protein kinase which in turn activates phosphorylate kinase which forms more ATP and thus speed up the muscle contraction. So, the correct answer is option A.
There are many hormones which bind to receptors and then activate a pathway. This pathway uses second messengers like a cyclic form of adenosine monophosphate (cAMP). Adrenaline is the hormone which uses cAMP as the secondary messenger that activates protein kinase which in turn activates phosphorylate kinase which forms more ATP and thus speed up the muscle contraction.
So, the correct answer is option A.
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