A pure artificial phospholipid bilayer is permeable tosmall hydrophobic molecules and small uncharged polar molecules. It is slightly permeable to water and urea and impermeable to ions and to large uncharged polar molecules. What kind of things can pass through the phospholipid bilayer?
In order to test one of the inferred translocation mechanisms, namely the spontaneous piercing through the membrane induced only by thermal motion, we calculate the energy cost associated with the insertion of a carbon nanotube into a model phospholipid bilayer using the single-chain mean field ...
An external electric field deforms flaccid phospholipid vesicles into spheroidal bodies, with the rotational axis aligned with its direction. Deformation is frequency dependent: in the low-frequency range (~1 kHz), the deformation is typically prolate, while increasing the frequency to the 10 kHz ra...
Water and oxygen can move across the membrane of the alveoli in the lungs. What is the name of the process these molecules use to pass through the membrane? Describe the flow of an oxygen molecule as it enters the nose, crosses ...
One of the most interesting findings of the current study is the fact that the EIS derived ζ parameter is sensitive to an average size of the defects thus enabling a purely electrochemical methodology to access fine structural information such as size of incomplete protein pores in phospholipid ...
Neurons (another term for nerve cells) send impulses called "action potentials" through their axons, which results in the release from the axon terminal of a small bag of chemicals called "neurotransmitters", which may then impart the necessary signaling for another neuron...
The ventral ganglion was removed, and the segmental nerves were stimulated through the suction electrode. Recordings of membrane potential were made by glass intracellular microelectrodes from ventral longitudinal fibers. To eliminate electrical contacts of the recorded fiber with its neighbors, the latter...
The unique feature of the eye lens fiber-cell plasma membrane is its extremely high cholesterol content; cholesterol/phospholipid molar ratio can be as high as 4 in human lens nucleus. Cholesterol saturates bulk phospholipid bilayers and induces formation of immiscible cholesterol bilayer domains (CBD...
Explain the difference between passive, facilitated, active, and coupled transport of how small molecules pass through the membrane. The plasma membrane acts as a barrier in cells of all types to control the movement of substances into and out of the cell. Describe, in detail, three ways ...
Water and small hydrophilic solutes A) may pass through the phospholipid bilayer of the plasma membrane. B) cannot pass through a plasma membrane. C) can dissolve holes in the plasma membrane. D) may pass through channels in the plasma membrane. E) do not What is the ...