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Rick and Lindsey Were on the Same Airplane During an Emergency

question 18

Multiple Choice

Rick and Lindsey were on the same airplane during an emergency landing. They met at the airport while waiting for another airplane. Over the next 4 months they formed a long distance relationship. Lindsey says her heart races whenever she sees Rick. What theory best exemplifies this?


Definitions:

First Messenger

A signaling molecule that binds to a receptor on the surface of a cell and triggers a biochemical cascade that conveys signals inside the cell.

Second Messenger

Intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules.

Type 1 Diabetes

A chronic condition where the pancreas produces little to no insulin, leading to elevated blood sugar levels.

Epidermal Growth Factors

A group of proteins that stimulate cell growth, proliferation, and differentiation by binding to their receptors on the cell surface.

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