Question 11 Amplification of a signal is possible when.. O a protein kinase phosphorylates an inactive kinase to initiate the next step. Ca2+ binds to calmodulin, changing its shape and activity. a signal transduction step involves an enzyme. O CAMP mu bi to a protein ase activate it. Question 12 Which cell junctions allow for direct cell communication? gap junctions O tight junctions O plasmodesmata O desmosomes

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Anatomical Position

Anatomical position refers to the position in which an individual faces forward with their upper limbs stretched to both sides with palms facing forward. The standard anatomical position of the body is used to reference other anatomical aspects of the body.