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Cells - Page Text Content

BC: "Don't cry because it's over, Smile because it happened." - Dr Seuss


1: CELL THEORY: THE THREE PRINCIPLES | ONE: | THREE: | TWO: | the cell is a basic unit of life | new cells only arise from cells that already exist | all organisms are made of one or more cells

2: CONTRIBUTIONS OF FOUR SCIENTISTS | MATTHIAS SCHLIEDEN: He suggested that the nucleus and cell development were closely related,. He decided that each cell lived a double life, one independent as itself, and one as a part of a bigger organism. | ROBERT HOOKE: He was the first person to observe cells in the side of a piece of cork. He thought that they looked like small compartments in the cork's wall, and gave them the Latin name "cellulae," meaning small rooms. This was later shortened to "cell."

3: THEODOR SCHWAN: After many years of studying, he concluded that plants and animals were made up of cells products, and that although the cell was an organism in itself, it ultimately made up the larger plant of animal. | RUDOLF VIRCHOW: While studying cell growth and reproduction, he noticed that cells divide in two, he concluded that every cell already comes from an existing cell.

4: TWO BASIC TYPES OF CELLS: | PROKARYOTIC CELLS: "Pro"= before "Karyon" = nucleus | Prokaryotes were the first living things to come into existence. They are identified by the fact that they lack a membrane-bound nucleus. And only contain a plasma membrane, which the outer boundary of the cell itself. | The domain of Prokaryotes are Archaea and Eubacteria. | They reproduce by means of binary vision; meaning they duplicate themselves. | Ribosomes are it's only organelle, and their genetic material is free within the cytoplasm. They are always single-celled, except for when the co-exist in colonies.

5: EUKARYOTIC CELLS: "Eu"= true "karyon"= Nucleus | Eukaryotes are complex cells with the presence of a nucleus, a double membrane-bound control center stopping the genetic material (DNA) from floating mindlessly around the cell. | These organelles are used for energy conversion within the cell. Other cellular organelles carry out additional functions required for the cell to thrive. | In addition to the plasma membrane, Eukaryotic cells contain many organelles, such as Mitochondria, and chloroplasts. | Ribosomes are it's only organelle, and their genetic material is free within the cytoplasm. They are always single-celled, except for when the co-exist in colonies.



8: THE NUCLEUS | The nucleus is a big sphere in the middle of the cell that has a double membrane around it to separate it from the cytoplasm. | The nucleus holds the DNA, and also contains Nuclear pores which are what the substances made in the nucleus to go through in order to get to the cytoplasm.

9: CELL WALL | The cell wall acts as a barrier or shield so that bacteria does not enter the cell. It gives structure to the cell and prevents the cell from over-expanding when water enters it.

10: ROUGH ENDOPLASMIC RETICULUM | It's appearance resembles a scrunched up, speckled ribbon. The speckles on the organelle are actually ribosomes. It creates a processes protein within the cell. | It creates a processes protein within the cell.

11: SMOOTH ENDOPLASMIC RETICULUM | It's called "smooth " due to the lack of ribosomes. It provides surface area for the transportation and storage of cells.

12: GOLGI APPARATUS | This sack of membrane-bound vesicles modifies, sorts, and packages proteins to store in the cell.

13: RIBOSOMES | A tiny, somewhat mitten shaped organelle occurring in great numbers in the cell cytoplasm either freely, in small clusters, or attached to the outer surfaces of the endoplasmic reticula. | The assemble amino acids within the cell.

14: LYSOSOME | They digest and recycle the cell's used components by breaking down proteins, lipids, carbohydrates, and nucleic acids. | Small spherical organelles that contain the cell's digestive enzymes.

15: MITOCHONDRIA | An organelle with two membranes, the outer smooth, and the inner folded, that produce the ATP, the main energy source for cells.

16: FLAGELLUM | They are long, thread-like structures that protrude from the cell's surface to help it move around up to 20 cells per second.

17: VACUOLE | Located in the middle of the cell, floating around in the cytoplasm. Mainly found in plant cells. | The cell's water source, and help transfer the cell's excretory waste from it.

18: The semipermeable membrane surrounding the cytoplasm. Proteins in the membrane control the passage of ions to let in water. | CELL MAMBRANE

19: HOMEOSTASIS | The tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing the coordinated response of it's parts to any situation or stimulus that would tend to disturb it's condition or function. | Example: Sweating during rigorous exercise to keep a functional body temperature.

21: "An open home, an open heart, here grows a bountiful harvest." - Judy Hand

23: Home is where there's someone to love, and someone to love us.

25: "Write it on your heart that every day is the best day of the year." - Ralph Waldo Emerson

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  • By: Delaney D.
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About This Mixbook

  • Title: Cells
  • Cells, and why they are cells
  • Tags: cell
  • Started: over 6 years ago
  • Updated: over 6 years ago