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Cosa sono le membrane?
A key characteristic of life is the ability to separate the external environment from the internal space. To do this, cells have evolved…
Fluidità di membrana
Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules…
Il modello a mosaico fluido
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of…
Che cos'è un gradiente elettrochimico?
Adenosine triphosphate, or ATP, is considered the primary energy source in cells. However, energy can also be stored in the electrochemical gradient…
Diffusione
Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances,…
Osmosi
Approximately 60% to 95% of the weight of living organisms is attributed to water. Therefore, maintaining appropriate water balance within cells is…
Tonicità negli animali
The tonicity of a solution determines if a cell gains or loses water in that solution. The tonicity depends on the permeability of the cell membrane…
Tonicità nelle piante
Tonicity describes the capacity of a cell to lose or gain water. It depends on the quantity of solute that does not penetrate the membrane. Tonicity…
Associazioni proteiche
The cell membrane—or plasma membrane—is an ever-changing landscape. It is described as a fluid mosaic as various macromolecules are embedded in…
Diffusione facilitata
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and…
Trasporto attivo primario
In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or…
Trasporto attivo secondario
One example of how cells use the energy contained in electrochemical gradients is demonstrated by glucose transport into cells. The ion vital to this…
Endocitosi mediata da recettore
Receptor-mediated endocytosis is a process through which bulk amounts of specific molecules can be imported into a cell after binding to cell…
Pinocitosi
Cells use energy-requiring bulk transport mechanisms to transfer large particles, or large amounts of small particles, into or out of the cell. The…
Fagocitosi
Cells pull particles inward and engulf them in spherical vesicles in an energy-requiring process called endocytosis. Phagocytosis (“cellular…
Esocitosi
Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy. While endocytosis takes…
Diffusione molecolare nel plasma membrane dei linfociti primari misurati da Fluorescence Correlation Spectroscopy
Fluorescence correlation spectroscopy (FCS) is a powerful technique for studying the diffusion of molecules within biological membranes with high…
La base di Cell-L-Glutatione Protezione saggi per studiare endocitosi e riciclo dei Plasma proteine ​​di membrana
Membrane trafficking involves transport of proteins from the plasma membrane to the cell interior (i.e. endocytosis) followed by trafficking to…
Esame delle vescicole sinaptiche Riciclaggio Uso FM coloranti Durante evocati, spontaneo, e miniatura Attività Synaptic
Synaptic vesicles in functional nerve terminals undergo exocytosis and endocytosis. This synaptic vesicle recycling can be effectively analyzed using…

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