Reflection of Cell Biology

Before coming into this course, I had limited knowledge about the different pathways for signaling molecules within our cells. Last semester and this semester, I was in a two semester anatomy and physiology course which went into detail about the different organ systems and cells of the human body. I was able to find many connections between the content of both courses, but one that I valued a lot from cell biology was the breakdown of how signaling pathways worked and their cascades within our cells. In anatomy, I had trouble recalling how certain organs could release hormones that would affect things such as glucose uptake and how calcium plays a role within our sodium-potassium pumps. However, this course really helped to break down the pathways by describing how certain pathways are controlled by specific proteins. For instance, with insulin, this is performed by the RTK pathway where phosphates are removed in order to increase glycogen levels within the body in response to high levels of glucose within the body. This conflicts with how the body responds to low levels of glucose in our bodies and instead signals for a G-protein pathway to be initiated where proteins begin to phosphorylate other things in order to increase glucose levels. Without knowing how the tiny parts of our cells initiate processes and what happens when things can become inhibited, it is a bit difficult to understand how they work on a larger scale without just memorizing it for short term storage.