1.During this last week’s lecture, we discussed how coffee keeps us awake by competing with adenosine for the adenosine receptor. Read the article and watch the videos above. The article discusses other reasons why individuals respond differently to caffeine, all of which involve biochemistry. Discuss your thoughts about this article, including your personal experiences with caffeine. Were you surprised by any of the factors discussed in this article? Do you disagree with any of these factors? Which of these factors do you believe explains your response to caffeine? Are there any other common food-related chemicals that we commonly consume that act as a competitive inhibitor of a normal biological process in our body?
You should contribute one (1) comment (at least 300 words) to this week’s discussion. In your post, you should provide a detailed explanation to support your views (include references, if needed). You may use the questions I asked above or discuss another aspect of the article and videos that caught your attention. Please DO NOT copy any of your classmates comments or plagiarize (you will not receive credit for doing this).
REPLY CLASSMATE 1:Juliana Sarpong:
Many of us rely on a morning cup of coffee or a jolt of caffeine in the afternoon to help us get through the day. Caffeine is so widely available that the U.S. Food and Drug Administration (FDA), says about 80 percent of U.S. adults take some form of caffeine every day. But caffeine does so much more than just keeping you awake. It is a central nervous system stimulant that affects your body in numerous ways. I found this week article and the videos remarkably interesting. My husband lives and breath coffee every morning. My husband started consuming coffee when he started working early morning like every other American. His first stop used to be either wawa or Starbucks. He started to realize that coffee was getting expensive, so he decided to buy his own Keurig machine and make his own coffee every morning. He drinks any amount of coffee, drink soda thinking it will help boost his energy. I guess all the years of drinking caffeine built an immunity in his body, so his system does not respond to it anymore.
This article has given me an understanding on how caffeine drinkers differ from person to person. I for one use to think that caffeine is the only way for early morning risers like my husband stay awake on their way to work, not knowing it does the opposite. And after reading the article I now know all the positive effect caffeine has on people like fight liver disease and helping with Parkinsons disease. Before reading this article I only knew of the withdrawal some people go through after a caffeine intake, but this article gave me an insight about the positivity on caffeine.
REPLY CLASSMATE 2:Akosua Brefo:
In this lesson we discussed about caffeine and its effect on the human brain.
I heard about drinking coffee to keep awake when I have preparing to take my final examination in secondary school (1999). I decided to take a cup of coffee to stay alert and study during the night. I added creamer, sugar two slices of bread. I slept just few minutes after drinking it. I discussed this with my mate and was told not to add neither sugar nor cream. Also, not to have anything with it. I managed to have it black with no added sugar or cream the next time. It tasted bitter but since I wanted to stay awake, I drank it. I slept just as the same as I added sugar and cream.
Probably my genetics are to blame! For not keeping awake after drinking black coffee with no sugar. Caffeine interacts most directly with the A1 receptor. Caffeine causes most of its biological effects via antagonizing all types of adenosine receptors (ARs): A1, A2A, A3, and A2B and, as does adenosine, exerts effects on neurons and glial cells of all brain areas.
This lesson has given me more insight about how people react to caffeine differently. I had a misconception that caffeine consumption. I did know caffeine had any health benefits apart from keeping people awake. I now know that moderate coffee consumption can help with liver disease, providing boast of antioxidants and protecting the brain against Parkinsons disease.
I had more insight about the bad effects of caffeine.
According to the article, people get caffeine from consumption of coffee, tea, soda or chocolate
I avoid coffee even though I like the smell because its side effect of getting addicted and all negatives said at it. Actually, I am getting caffeine from consumption of chocolate.
Answer the following questions related to the case study (Sweet Truth: Not all Carbohydrates are Alike):
1. In aqueous solutions, there are three forms of glucose: the cyclic alpha-form (36%), the cyclic beta-form (64%), and a trace amount of the open-chain form. At equilibrium, the cyclic alpha- and beta-forms are constantly interchanging when in solution. (1) Explain why the cyclic forms exist predominately in solutions, AND (2) explain why the cyclic beta-form is more abundant than the cyclic alpha-form.
2. Name the monosaccharides and disaccharides in amylose and cellulose. Compare the structural and conformation differences between amylose and cellulose. A simple iodine test can be used to distinguish the two polysaccharides. (1) Describe the iodine test AND (2) explain the observation.
3. List AND explain the side effects that can be caused consuming too much sorbitol.
4. Why are soluble fibers identified as prebiotics?