During this week (7-11 September), in biology class we start the class on Monday by continuing in discussing about mitosis in cell cycle, starting from the anaphase. After the anaphase, there is the last step of mitosis which is telophase. I learned from the steps of mitosis that mitosis happens when centriole starts to appear and going to separate direction and the nuclear membrane broke. As the dan floats in the cytoplasm, the pairs of chromosome attach to the spindle fibers connected to the centriole. Then the pair of chromosome separate and two nuclei start to appear as the chromosome appear as the chromatin. Then during cytokinesis phase in cell cycle, the cell formed new nucleus and divides itself. After that, we also learned about the process of photosynthesis and cellular respiration. Their relation is that photosynthesis is used by plants to make food in a form of glucose and later the glucose is used in cellular respiration to produce ATP energy in the mitochondria that is used for active transport. On Tuesday, in biology class we continue learning more about cells. We learned about types of cell in the body such as red blood cells, nerve cells, bone cells, sperm cells, epithelial muscle cell, skeletal muscle cell and others. We also learned about the difference between cells, tissue, organ, system and organism. Tissue is a group of cells working together, organ is a group of different tissue working together, system is a group of different organs working together and organism is a group of different systems coordinated to carry out some function. After that, we were told to make our cheat sheet for the summative assessment on Monday. On Friday, in biology class we did a review for Monday's summative. I get to ask the question about what I'm still confused about, which is the more detailed cellular respiration. I learned that cellular respirations happens in mitochondria to make ATP that stands for Adenosine Triposphate, Mitochondria also produce waste in a form of water and carbon dioxide. In cellular respiration, the atom C6 will break into two, and then C3 is equal to two ATPs. In the ATP, there is three phosphate, and later one phosphate is given to cell membrane for active transport, while the other two phosphates will return because the phosphates has to be in a pair three. I'm kinda still confused about it, but I decided to add it in my list of what-to-learn for the summative along with microscopes and how prokaryote organelles work together.
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During this week (7-11 September), in biology class we start the class by review as Ms. Disty ask each of us about what have learned from the previous lesson. Then, Ms. Disty informs us that for the biology formative assessment, we will be making our question and later we will trade with our classmates to fill in each other's. Ms. Disty also gives us the point criteria for each question and we have to make questions that has a total worth of 20 points. The formative will be done on Tuesday. On Tuesday, we start the class continuing the formative assessment task by making our own questions relating to what we have learned so far. We have to make questions that is worth 20 points total. The questions are later be given to our friends to fill. Luckily I got easy questions from my friend so I manage to do the formative well. I did have difficulty in making a case problem for my own questions because I still don't understand real life health cases that could be related to the cell theories that we learned so far. On Friday, we started the class by doing another review relating to the formative assessment. Ms. Disty ask each of us a question relating to the things we have learned so far about cells. Then, we start on a lesson about cell reproduction and how they do it. I learned that the process of cell reproduction is called "cell division mitosis". Cell reproduction is a part of mitotic phase of a cell. In a cell reproduction, the DNA is copied and they became larger until the mitosis phase where they divide their self. Humans have 46 chromosomes, 23 from female egg and 23 from the sperm. What I am still confused about is the detailed steps of mitosis and how it happens. During this week (31 August - 4 September), in biology class we started on Monday by learning further about cells and their organelle through Ms. Disty's explanation. I learned that prokaryotes evolve into eukaryote in order to became better and survive environmental changes. Prokaryotes also have flagella in order to help it move since its a single cell. Plant cells and animal cells are both eukaryote cells while protists are prokaryotes. The difference between plant cells and animal cells is that plant cell has cell wall, chloroplast, cytoskeleton and central vacuole while animal cells doesn't. But they both have vesicle, chromatin, cytoplasm, ER, golgi apparatus, lysosome, mitochondria, nucleus, nucleolus, plasma membrane, ribosomes and vacuole. Cells work just like the human body with the organelles as the organs with each of their different functions and the nucleus as the brain. We are also divided into our groups that day, and I'm lucky to be with the diligent kids (yay!). The disease that I choose as a topic for the project is MERS (Middle East Respiratory Syndrome). On Tuesday, in biology class we did our cell analogy worksheet and make analogy of how cell work with other thing. My group decided to do the analogy of how cells work with the system of business and the actors of business as the organelles. On Friday, in biology class we learn more deeper about cell membrane. I learned that cell membrane is the boundary between inside and outside of the cell and that it is also made of oil in order to contain what's inside of it. Materials goes in and out of cell membrane, going in through door called protein channels. Osmosis in cell happens when the molecules move from high concentration to low concentration place, there are simple, facilitated and active transport. Simple transport does not need channels, facilitated need channels and active transport needs ATP energy. So far, there's nothing I don't really understand about, but I maybe should learn more about cell membrane diffusion. During this week (24-28 August), in biology class we started everything with the introductions and class rules explanation on Monday. On Tuesday, we watch a movie titled “Gattaca” that integrates with biology. The movie is a science fiction movie where DNA determines everything, mostly a person’s social class. This movie also has a connection in what we are going to learn in this term's biology, which is about DNA and how it defines a person's identity. On Thursday, in biology class we did pre-assessment about cells. I manage to rocked on the assessment, lol just kidding. I really forgot everything about cells that I learned during sixth grade. So I tried to use my logic to finish the test, but it seems like its still not good enough. By this, I have made myself a note that I should study about cells all over from the beginning since I completely forget about it and the only thing I remember is nucleus. On Friday, Ms. Disty did a powerpoint presentation about cell theory and types of cells. There are four scientist, Janssen, Hooke, Pasteur and Leewenhoek who each had their theory about cell. Robert Hook was the first who discover cells and made a theory that cells are hollow inside, that's why its named cell, which means cellula or empty. There are also two types of cell, prokaryote and eukaryote. Their difference is that eukaryote has nucleus and membrane bound organelle, while prokaryote doesn't. The DNA on a prokaryote also has a circle form, while in eukaryote it has a linear form. There are still some things that I need to learn about cells more detailed such as the organelles, their differences and their functions. |
AuthorName: Astrida Nayla Archives
April 2016
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