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  • https://bio.libretexts.org/Courses/Clackamas_Community_College/Clackamas_Biology_112_OER_Textbook_(OpenStax)/03%3A_Cell_Structure_and_Function/3.A%3A_Cell_Structure_and_Function_(Exercises)
    Transmission electron microscopes are designed to examine the internal structures of a cell, whereas a scanning electron microscope only allows visualization of the surface of a structure. Before disc...Transmission electron microscopes are designed to examine the internal structures of a cell, whereas a scanning electron microscope only allows visualization of the surface of a structure. Before discussing the functions of organelles within a eukaryotic cell, let us first examine two important components of the cell: the plasma membrane and the cytoplasm. The fluidity of the cell membrane is necessary for the operation of some enzymes and transport mechanisms within the membrane.
  • https://bio.libretexts.org/Courses/Citrus_College/Citrus_College_General_Biology_Textbook/04%3A_Cell_Structure_and_Function/4.E%3A_Cell_Structure_and_Function_(Exercises)
    Transmission electron microscopes are designed to examine the internal structures of a cell, whereas a scanning electron microscope only allows visualization of the surface of a structure. “Form follo...Transmission electron microscopes are designed to examine the internal structures of a cell, whereas a scanning electron microscope only allows visualization of the surface of a structure. “Form follows function” refers to the idea that the function of a body part dictates the form of that body part. At the level of the cell, in tissues involved in secretory functions, such as the salivary glands, the cells have abundant Golgi
  • https://bio.libretexts.org/Courses/Folsom_Lake_College/BIOL_310%3A_General_Biology_(Wada)/03%3A_Cell_Diversity_Structures_and_Transport/3.01%3A_Cell_Structure_and_Function/3.1.E%3A_Cell_Structure_and_Function_(Exercises)
    Before discussing the functions of organelles within a eukaryotic cell, let us first examine two important components of the cell: the plasma membrane and the cytoplasm. If a substance must move into ...Before discussing the functions of organelles within a eukaryotic cell, let us first examine two important components of the cell: the plasma membrane and the cytoplasm. If a substance must move into the cell against its concentration gradient, that is, if the concentration of the substance inside the cell must be greater than its concentration in the extracellular fluid, the cell must use energy to move the substance.
  • https://bio.libretexts.org/Courses/Clackamas_Community_College/Clackamas_Biology_112_OER_Textbook_(OpenStax)/04%3A_The_Working_Cell/4.A%3A_Cell_Structure_and_Function_(Exercises)
    A physical space in which there is a different concentration of a single substance is said to have a concentration gradient. If a substance must move into the cell against its concentration gradient, ...A physical space in which there is a different concentration of a single substance is said to have a concentration gradient. If a substance must move into the cell against its concentration gradient, that is, if the concentration of the substance inside the cell must be greater than its concentration in the extracellular fluid, the cell must use energy to move the substance.
  • https://bio.libretexts.org/Courses/Cosumnes_River_College/Contemporary_Biology_(Aptekar)/03%3A_Cell_Structure_and_Function/3.E%3A_Cell_Structure_and_Function_(Exercises)
    Before discussing the functions of organelles within a eukaryotic cell, let us first examine two important components of the cell: the plasma membrane and the cytoplasm. If a substance must move into ...Before discussing the functions of organelles within a eukaryotic cell, let us first examine two important components of the cell: the plasma membrane and the cytoplasm. If a substance must move into the cell against its concentration gradient, that is, if the concentration of the substance inside the cell must be greater than its concentration in the extracellular fluid, the cell must use energy to move the substance.

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