So we had some announcements, pieces of advice, and reminders before class.
#1 – First, don’t forget to fill out the mid-semester feedback form that’s due Monday!
#2 – Here’s a helpful piece of advice: write down all the due dates in your calendar 🙂
#3 – Don’t forget that the mid-term is next Wednesday, March 16th!!!! It will be like the quizzes we’ve had (about 50% the same as the quizzes), and it will cover up through chapter 40 (what we got done on the 9th.) We will review on Monday.
Then we started into the lecture, and some questions were brought up.
One of the questions that was asked in class was, “Why are vertebrates less efficient in keeping in energy than invertebrates?” We came up with some reasons. Invertebrates are cold-blooded and they don’t need to respire as much, so they can keep more energy in. Vertebrates, however, do respire more, and they digest more and have less feces, therefore they are not as efficient in keeping energy in.
Another question that was asked that I am particularly interested in was “What is blue-baby syndrome?” Those of you who know me know that I LOVE babies! I want to be a neonatologist, so it’s natural. So, I did some research and I found that blue-baby syndrome is also called methemoglobinemia. This occurs when there is a rise in the level of methemoglobin in an infant’s blood. (Methemoglobin is a non-oxygen carrying enzyme that is produced by the body, which is converted to hemoglobin.) The reason there could be a rise in the levels of methemoglobin in the blood is because if there is a high level of nitrates in drinking water, the nitrates are converted to nitrites in the infant’s digestive system. These nitrites react with the hemoglobin in the infant’s blood, causing a high level of methemoglobin. Because methemoglobin does not carry oxygen, the infant’s organs may not get enough oxygen, so the infant may turn blue, hence the term “blue-baby syndrome.” The infant may also start vomiting or may have a harder time breathing. If this happens, then the infant should be taken to a doctor, in which the doctor can give the infant methylene blue, which will make the infant’s blood go back to normal. I found this extremely interesting! And now you know what blue-baby syndrome is. Here is the URL if you want to read the whole article.
We also wanted to know what potash is made out of. So, I did a little investigating, and I found that it is potassium carbonate, which almost all came from wood ashes. Here’s the URL for the whole article about it if you want to know more!
And that was it for this class period! 😀