Breathe In

I must continue to commend my AP Biology class for the effort that they are currently putting forth. Can you imagine, trying to do a 2 semester college course in only a semester! Because of the pace topics are flying by faster than your body synthesizes ATP (bad science joke I know). Anyway, our review for the week of 1/23 is by Imani Thompson and Marcus Ramos-Pearson.

Imani writes:

[caption id="attachment_379" align="alignleft" width="290" caption="By Jay Reimer"][/caption]

This week in class we learned about metabolic processes in animal and plant cells. We also discussed how energy is used in the process of metabolizing substances. The most interesting thing we talked about was cellular respiration. There are processes in cellular respiration that require oxygen which are Glycolysis and the Krebs cycle. Glycolysis and the Krebs cycle are used to produce ATP that gives our bodies energy, but there are other processes the body can use without the presence of oxygen. Those processes are fermentation and anaerobic respiration. It is fascinating to know that our bodies have multiple ways and backup plans for producing the energy our bodies need. Overall this week I learned the very important and very intriguing ways our body can make energy in ideal and non ideal situations.

Marcus Adds:

Last week we learned about metabolism, cellular respiration, and energy usage. Metabolism is not just when your body breaks down stuff into smaller units(catabolism), but also its the processes of building up a complex molecule with those small units (anabolism). The tricky thing about Cellular respiration is that there are three parts to it: Glycolysis, Krebs cycle, and oxidative phosphorylation. Glycolysis happens in the cytoplasm and turns a glucose into 2 pyruvates and 2 ATP are made. For Krebs Cycle to happen, oxygen must be present because it happens the mitochondria and the pyruvates has to be changed to acetyl-CoA. In O.P., this is when the ETC comes into play and this part happens in the cristae of the mitochondria. Lastly, energy is when a phosphate has been hydrolyzed from an ATP, and that phosphate attaches to something and causes it to become phosphorylyzed.


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