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- https://bio.libretexts.org/Workbench/General_Biology_I_and_II/02%3A_Unit_II-_The_Cell/2.02%3A_Structure_and_Function_of_Plasma_Membranes/2.2.05%3A_Bulk_TransportIn addition to moving small ions and molecules through the membrane, cells also need to remove and take in larger molecules and particles. Some cells are even capable of engulfing entire unicellular m...In addition to moving small ions and molecules through the membrane, cells also need to remove and take in larger molecules and particles. Some cells are even capable of engulfing entire unicellular microorganisms. You might have correctly hypothesized that the uptake and release of large particles by the cell requires energy. A large particle, however, cannot pass through the membrane, even with energy supplied by the cell.
- https://bio.libretexts.org/Workbench/Bio_11A_-_Introduction_to_Biology_I/10%3A_Membrane_Transport/10.07%3A_Bulk_TransportIn addition to moving small ions and molecules through the membrane, cells also need to remove and take in larger molecules and particles. Some cells are even capable of engulfing entire unicellular m...In addition to moving small ions and molecules through the membrane, cells also need to remove and take in larger molecules and particles. Some cells are even capable of engulfing entire unicellular microorganisms. You might have correctly hypothesized that the uptake and release of large particles by the cell requires energy. A large particle, however, cannot pass through the membrane, even with energy supplied by the cell.
- https://bio.libretexts.org/Bookshelves/Human_Biology/Human_Biology_(Wakim_and_Grewal)/05%3A_Cells/5.08%3A_Active_Transport_and_HomeostasisWhen substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transpo...When substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transport.
- https://bio.libretexts.org/Courses/New_England_College/Microbiology_with_NEC/04%3A_The_Eukaryotes_of_Microbiology/4.01%3A_Characteristics_of_Eukaryotic_CellsEukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of mate...Eukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of materials into and out of the nucleus through nuclear pores. Eukaryotic cell morphologies vary greatly and may be maintained by various structures, including the cytoskeleton, the cell membrane, and/or the cell wall The nucleolus in the nucleus of eukaryotic cells is the site of ribosomal synthesis.
- https://bio.libretexts.org/Courses/Canada_College/Human_Biology_Biol_011_Textbook/05%3A_Cells/5.08%3A_Active_Transport_and_HomeostasisWhen substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transpo...When substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transport.
- https://bio.libretexts.org/Workbench/Principles_of_the_Human_Body/6%3A_Cells/6.08%3A_Active_Transport_and_HomeostasisWhen substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transpo...When substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transport.
- https://bio.libretexts.org/Courses/City_College_of_San_Francisco/Introduction_to_Microbiology/03%3A_The_Cell/3.03%3A_Unique_Characteristics_of_Eukaryotic_CellsEukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of mate...Eukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of materials into and out of the nucleus through nuclear pores. Eukaryotic cell morphologies vary greatly and may be maintained by various structures, including the cytoskeleton, the cell membrane, and/or the cell wall The nucleolus in the nucleus of eukaryotic cells is the site of ribosomal synthesis.
- https://bio.libretexts.org/Courses/Sacramento_City_College/BIOL_440%3A_General_Microbiology_(Hughes)/03%3A_Week_3/05%3A_The_Cell/5.04%3A_Unique_Characteristics_of_Eukaryotic_CellsEukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of mate...Eukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of materials into and out of the nucleus through nuclear pores. Eukaryotic cell morphologies vary greatly and may be maintained by various structures, including the cytoskeleton, the cell membrane, and/or the cell wall The nucleolus in the nucleus of eukaryotic cells is the site of ribosomal synthesis.
- https://bio.libretexts.org/Courses/Minnesota_State_Community_and_Technical_College/Biology_of_Human_Concerns_(Daniels)/03%3A_Cells/3.08%3A_Active_Transport_and_HomeostasisWhen substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transpo...When substances require energy to cross a plasma membrane often because they are moving from an area of a lower concentration to an area of a higher concentration, the process is called active transport.
- https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(OpenStax)/03%3A_The_Cell/3.04%3A_Unique_Characteristics_of_Eukaryotic_CellsEukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of mate...Eukaryotic cells are defined by the presence of a nucleus containing the DNA genome and bound by a nuclear membrane (or nuclear envelope) composed of two lipid bilayers that regulate transport of materials into and out of the nucleus through nuclear pores. Eukaryotic cell morphologies vary greatly and may be maintained by various structures, including the cytoskeleton, the cell membrane, and/or the cell wall. The nucleolus in the nucleus of eukaryotic cells is the site of ribosomal synthesis.
- 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/3.1.06%3A_Active_TransportActive transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP). If a substance must move into the cell against its concentration gradient, that i...Active transport mechanisms require the use of the cell’s energy, usually in the form of adenosine triphosphate (ATP). 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. Some active transport mechanisms move small-molecular weight material, such as ions, through the membrane.
