Paracrine Signaling:This form of communication takes place between cells that are near each other, but are not connected. In this case, the cells talk via the diffusion of chemical signaling molecules across short distances.Synaptic signalingbetweenneurons(brain cells) is an example of paracrine sign...
In fact, the Enterprise penetrates the organism's cell membrane and goes into its cytoplasm to destroy it. Could such an organism be possible? A single cell depends upon the process of diffusion to get materials across its membrane and move materials within it. Diffusion is the movement of a...
How does a selectively permeable membrane affect diffusion? Explain how hormones reach their target cells and exert their influence at a cellular level. How does cell transportation work and how does it connect with the urinary system? How is the plasma membrane of a cell organized?
Commercialization is widely believed to be achievable for metal halide perovskite solar cells with high efficiency and low fabrication cost. However, stability remains a key obstacle for them to compete with established photovoltaic technologies. The pho
In 1952 Turing published a paper which showed how under restricted conditions a class of chemical reactions could give biological patterns in diffusion-coupled cells. Although this theory has been much discussed, little has been learnt about the range and type of pattern it can generate. In order...
Osmosis is the passage or diffusion of water or other solvents through a semipermeable membrane that blocks the passage of dissolved solutes [source: Encyclopedia Britannica]. What, you don't get it? No fear. Most of us don't, which is why there are countless explanations and analogies to ...
How did the surface area affect the diffusion of the cube? How does ABE fermentation work? Explain how an ELISA test works. How is an IgG organized (components and interactions)? How is Gram staining done? How and why does a crystal of NaCl dissolves in water? Explain biostimulation. How...
Cell survival is conditional on maintaining a favorable acid–base balance (pH). Due to changes in CO2 and lactic acid production, cancer cells are continuously exposed to large acid–base fluxes. In poorly perfused tumors, additional diffusion-reaction mechanisms involving carbonic anhydrase (CA) en...
How are diffusion and osmosis important to cells? What are concentration and electrochemical gradients? How do such gradients affect transport across a membrane? How does osmosis work in a cell if a cell is placed in a solution with a higher concentration of solute t...
How are cells able to transport large molecules? How do nonpolar molecules cross the cell membrane? How does facilitated diffusion enable molecules to cross cell membranes? Why is it important for cells to be able to use both active and passive transport to transport molecules acr...