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Give the correct order of the following steps in the "flight or fight" response.  1. Stored glucose molecules are released from glycogen.  2. Epinephrine binds to its receptor outside the cell.  3. cAMP activates a protein kinase.  4. A G-protein is activated.  5. Glucose is released into the bloodstream.Group of answer choices2, 1, 3, 4, 52, 4, 3, 1, 52, 3, 4, 1, 51, 2, 4, 3, 51, 4, 3, 2, 5

Question

Give the correct order of the following steps in the "flight or fight" response.  1. Stored glucose molecules are released from glycogen.  2. Epinephrine binds to its receptor outside the cell.  3. cAMP activates a protein kinase.  4. A G-protein is activated.  5. Glucose is released into the bloodstream.Group of answer choices2, 1, 3, 4, 52, 4, 3, 1, 52, 3, 4, 1, 51, 2, 4, 3, 51, 4, 3, 2, 5

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Solution

The correct order of the steps in the "flight or fight" response is: 2, 4, 3, 1, 5.

Here's the step-by-step process:

  1. Epinephrine binds to its receptor outside the cell. This is the first step because epinephrine (also known as adrenaline) is the hormone that triggers the fight or flight response.

  2. A G-protein is activated. This happens after the epinephrine has bound to its receptor. The G-protein is a type of protein on the cell membrane that gets activated when a hormone like epinephrine binds to its receptor.

  3. cAMP activates a protein kinase. cAMP is a molecule that is produced when the G-protein is activated. This molecule then goes on to activate a protein kinase, which is an enzyme that can modify other proteins.

  4. Stored glucose molecules are released from glycogen. The activation of the protein kinase triggers the release of glucose molecules that are stored in the form of glycogen in the liver and muscles.

  5. Glucose is released into the bloodstream. Finally, the glucose that was stored in the form of glycogen is released into the bloodstream to provide energy for the fight or flight response.

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