Cell Activity

Descripción

Mapa Mental sobre Cell Activity, creado por Shivam Patel el 14/02/2015.
Shivam Patel
Mapa Mental por Shivam Patel, actualizado hace más de 1 año
Shivam Patel
Creado por Shivam Patel hace casi 11 años
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Resumen del Recurso

Cell Activity
  1. Specialisation
    1. Fat Cells
      1. large surface area, storage cells, if you have more food than you need, fat fills fat cells. They have: v. few mitochondria as they use v. little energy and can expand (1000 times) its original size as it fills with fat.
      2. Root Hair Cell
        1. Plants absorb water from the soil by osmosis. Root hair cells are adapted for this by having a large surface area to speed up osmosis.
        2. Specific Jobs controlled by different genes
          1. Sperm
            1. long tail to help it swim, hard head so it can penetrate the egg, head is filled with DNA as this is vital to its job
            2. Cone
              1. the light sensitive layer of your eye (retina) makes you able to see in colour. They have: visual pigment in outer layer which changes chemically in coloured light. Middle segment, produces lots of energy that means the visual pigment can reform and a specialised nerve ending/synapse which connects to optic nerve which carries impulses to your brain.
            3. Structure
              1. Plant
                1. Animal
                  1. Bacteria
                    1. Yeast
                    2. Movement Across a Membrane
                      1. Diffusion
                        1. Diffusion allows substances to pass in and out of the cell, things such as oxygen and carbon dioxide.
                        2. Factors affecting Diffusion/Osmosis
                          1. surface area to volume ratio, tempreture, size of molecule
                          2. Osmosis
                            1. a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one.
                            2. Active Transport
                              1. the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
                            3. Function of Organelles
                              1. Mitochondria
                                1. The main function of mitochondria in aerobic cells is the production of energy by synthesis of ATP
                                2. Ribosomes
                                  1. Produces Proteins
                                  2. Chloroplasts
                                    1. Chloroplasts are the sites of photosynthesis within plant cells.
                                    2. Cell Membrane
                                      1. What comes in and out of the cell
                                      2. Cytoplasm
                                        1. Where all the the cells chemical reactions occur.
                                        2. Nucleus
                                          1. "Control Center" of the cell. "Contains the cell's DNA (genetic information) in the form of genes.
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