S: Seasons of Change
FC: of change | Cell's Mixbook
2: Three principles of Cell Theory | 1st principle- All organisms consist of one or more cell(s). So if you are a living organism you have at least one cell. | 2nd principle- The cell is the basic unit of structure for all organisms. All organisms are composed of cells. | 3rd principle- All cells arise from only pre-existing cells.
3: Contributions of Scientists to History | Robert Hooke- Hooke identified then named cells, he also observed that plants contained cells, named organelles. | Theodore Schwann-He concluded that all animals are made up of cells and came up with the cell theory with Schleidan. | Schleidan proposed that all plants are composed of cells; together with his friend Schwann formulated the cell theory of life. Schleidan observed various cell structures and activities, such as protoplasmic streaming . He also found that certain fungi live on or within the roots of some plants. | Virchow- Suggested that all cells come from pre-existing cells which is the third principle of cell theory, he pioneered the modern concept of pathological processes
4: Prokaryotic Cells VS Eukaryotic Cells! | Prokaryotic Cells | Eukaryotic Cells | Smaller cells Always unicellular No nucleus, or any membrane-bound organelles such as mitochondria DNA is circular, without proteins Ribosomes are small 60s No Cytoskeleton Cell division is always binary fission Motility by rigid rotating Flagellum | Larger Cells Often multicellular Always have nucleus and other membrane-bound organelles DNA is linear and associated with proteins to form chromatin | Ribosomes are large 80s Always have cytoskeleton Cell Division is by Mitosis or Meiosis Motility by waving cilia
5: Plant VS Animal Cells | Plant Cells | Animal Cells | Cilia is very rare Shape is rectangular Plant cells have chloroplasts to make their own food One large central vacuole taking up 90% of cell volume Centrioles only present in lower plant forms Plastids are present Cell wall is present Plasma membrane; has a cell wall and a cell membrane Lysosomes usually are not evident | Cilia is present Round in shape(irregular) Do not have chloroplasts one or more small vacuoles Centrioles are present in all animal cells Plastids are absent Cell wall is absent Only Cell Membrane Lysosomes occur in cytoplasm
6: Cell Membrane | The cell membrane forms a barrier between the inside of the cell and the outside, so that the chemical environments on the two sides can be differ. The cell controls those differences so as to optimize the workings of the chemical machinery inside the cytoplasm. The cell also causes brief changes in the internal environment by moving stuff across the membrane in a controlled way. These changes are the ways in which a cell responds to events in the outside world. | The cell membrane is not one solid piece. Everything in life is made of smaller pieces and a membrane is no different. Compounds called proteins and phospholipids make up most of the cell membrane. The phospholipids make the basic bag. The proteins are found around the holes and help move molecules in and out of the cell. | Function | Structure
7: Homeostasis | Function | The function of Homeostasis is to make sure that the body maintains it natural balances, for example it makes sure that the temperature and water levels are kept controlled in the body. Body Temperatures and Temperature is controlled by negative feedback by the nervous system as the body needs to have a constant temperature of 98.6 degrees otherwise the body cannot function properly. blood sugar levels are controlled by the pancreas releasing hormones called insulin according to how much is needed. | Structure | The structure in the body that is most responsible for mantaining homeostasis is the plasma membrane.
8: 10 Cell Structures | Cell membrane- The thin layer of protein and fat that surrounds the cell Gulgi Apparatus- Packages protein and carbohydrates into membrane-bound vessels Lysosome- Round organelles that contain the digestive enzymes. Mitochondrion- Converts the energy stored in glucose to ATP Nucleolus- Organelle within the nucleus- it is where ribosomal RNA is produced.
9: Nucleus- Controls many functions of the cell, and also stores the DNA of the cell Ribosome- Small organelles composed of RNA-rich cytoplasmic granules that are the sites of protein synthesis. Rough ER- Covered by Ribosomes. Transports materials through the cells and produces proteins. Smooth ER- Contains enzymes and produces and digests lipids and membrane proteins. Doesn't have ribosomes on it which makes it look smooth. Cell Wall- A thick rigid membrane that surrounds a plant cell it also bonds with other cell walls to form the structure of a plant | 10 Cell Structures Cont.
12: is in the air...
19: "I hope you always have a shell in your pocket...and sand in your shoes."
21: Day at the Beach
23: Lasting Memories...
24: "An open home, an open heart, here grows a bountiful harvest." - Judy Hand
27: Playing in the leaves! | The more you laugh, the longer you live.
28: These Are The Moments I Live For
32: Warm & Cozy
33: wonderland | Dashing Through the Snow
35: Home is where there's someone to love, and someone to love us.