Saturday, March 14, 2009

Week 8

This week we learned about the second messenger system and its two pathways. There is the cAMP pathway and the PKC pathway. These pathways are much easier to understand through diagrams instead of words. We also went over protein and steroid hormones. There are many differences between the two. The role of the steroid hormone is to make new protein hormones where as the protein hormone causes the hormones to deactivate and activate their activities. Steroid hormones when traveling through the blood have to be connected with a transport protein. This is the case because a steroid hormone is non-polar. This process takes longer than a protein hormone but has a longer half-life. Protein hormones travel through blood. Protein hormones might travel faster but they also have a shorter half-life and degrade fast.

There is a disorder know as the hypersecretion disorder. This is when there is more of a hormone being secreted than necessary in the gland. This is caused by the tropic hormone. There is also hyposecretion where not enough hormone is being produced to function properly. These disorders can be caused by genetics, our diets, or infections. So take care of your body and eat healthy.

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