Did You Know Thursday
Here’s what’s been going on this week…
I missed A & P lecture Tuesday, but I think I’ll be fine. I really like my professor as a person; she’s funny, intelligent, and of course my age, but she teaches from power point slides that she puts online. So hello self learning.
I can’t find my lab coat. I had it Thursday, forgot about it until I needed it yesterday, and scrambled to borrow a friend’s so I wouldn’t bear the wrath of my teacher.
In 2 weeks I have my “Unknowns” practical and I’m FREAKING out! My professor happens to like me, and I him, so there are expectations to uphold. Such as he thinks I’m smart and I need to continually work my butt off to prove that I am.
Now onto what I learned….
* I am simply amazed by our body’s immune system. Once a foreign body has been detected, your body sets in motion an “attack” to prevent its spread. Cells called phagocyte (fay-go- sites), come onto the scene ready to engulf the foreign particle. Once inside the phagocyte, the foreign body travels in a special vesicle to a lysosome. A lysosome is a vesicle filled with digestive enzymes. These enzymes dissolve the foreign body so it will not destroy you. They also take an antigen from the foreign body and place it on the surface of the phagocyte. An antigen is a readable code. It’s where other cells can attach or exchange proteins or it’s how a cell can tell what another cell is.
The phagocyte then heads to the lymph nodes to present this foreign body antigen. T cells and B cells are triggered into action. They get sensitized to this foreign body so they can figure out how to kill it. They also create memory cells for the next time it prevents itself. Pretty freaking cool!
* A fever is the body’s way of fighting an infection. A phagocytic cell called a macrophage secretes pyrogens in your body when it senses that tissues need repair or foreign bodies are present. Pyrogens can reset your body temperature (which is controlled by the hypothalamus) to inhibit some viruses and bacteria. Some of these organisms don’t like it hot. It also sets your metabolism in motion and stimulates more cellular activity. A 1 degree increase in temp causes your metabolic rate to increase by 10%! No wonder you get hungry!! So remember, fevers aren’t always bad. (Under 102; for non-infants, elderly, or immunocompromised of course.)
* Once stimulated by the presence of a foreign antibody, (and the presentation by the phagocyte of the antigen), B cells in the lymph nodes undergo mitosis and then differentiate into plasma cells. These plasma cells then make the antibodies you need to fight off infection. IgA, IgG, IgM, IgE, and IgD are the immunoglobulins circulating in your blood and lymph fluid.
* You also have humeral antibodies that are created and secreted by cells when a foreign body is detected. Some cause the bacteria or virus to clump together and “fall” out of solution (like your blood), others cause the foreign cell or your cell that has been compromised, to kill itself.
* Not only does our immune system attack any foreign proteins in your body, but it will also kill any cell that it detects has mutated; i.e. malignant cells. When you are in utero, your body is busy “scanning” itself to learn what proteins are specific to you. It knows everything about you so it can be ready to attack anything that is “not self”.
* What can you do to help your immune system? Eat well, rest, drink enough fluids, exercise, and take supplements if needed. Be thankful you have this strong immune system to defend you. People who are immunocompromised do not have this defense. There are no T or B cells to spring into action resulting in severe illness or death.
As Seen on Facebook
Lately it seems that all my friends have been “assigned numbers”, which translates into creating lists of mostly unknown facts about themselves. I have to admit that while I’m the last person to make a list or play a game on FB, I’ve been reading every last one of them. Since most of these people did not come into my life until we were much older, I love finding out the little tidbits that only a childhood friend would know.
I’ll cut the suspense and tell you I assigned myself the number 10.
1. I wanted to be a dancer as a child, so I danced everywhere!! My mother was constantly telling me to stop.
2. I cannot sit still. I shift positions, doodle, or just do two things at once. This drives my husband crazy!
3. There is nothing, and I mean nothing that grosses me out more than mushy food in the sink.
4. Most times I will answer you in a movie or TV quote. If I don’t, I’m thinking it in my head.
5. My first car was a standard. I will drive one until I die because I don’t feel like I’m really driving in an automatic.
6. I don’t know how to swim very well at all and being out on the water scares me.
7. If I could change anything about myself, I would be a genius. (But retain all my social skills.)
8. I cannot sing and I think that is unfair.
9. I broke my pinkie during field day in 4th grade. I lied to the ER doc and told him the Novocain worked. It didn’t. He put a pen between my fingers and used it to straighten out my broken finger. Water seeped out of the corners of my eyes, but I did not cry. I did not admit that I lied either.
10. I used to think UFO’s were going to take me away from my parents when I was little.
So now we’re besties! What 10 things are you willing to share? (Use the “ask me anything” tab and leave me your list).