To fuse like this, the forces that act to push membranes away from one another need to be overcome.
Syringe-push membrane absorption (SPMA) was successfully developed by a combination of 5-ml medical syringe and protein-absorbable membrane.
Middle: during constriction, the ring develops into two helical spirals, leading to forces pushing membrane inwards, and this might explain how abscission is accomplished since membranes will presumably not fuse while the protein filaments are in between (see Figure 4A bottom right and Video 9 for an example of this in liposomes).
Some of these, known as outer hair cells, push the membrane up and down in sync with the vibration, amplifying the sounds 1000-fold and sharpening the ear's ability to distinguish pitch.
In a real neuron, an instantaneous charge injection (if there were such a thing in reality) would have to be of gigantic strength to push the membrane potential above 0 mV instantly, and thereby by our definitions trigger an instant action potential.
A Freer elevator was used to gently push the membrane inward.
Actins elongate in the form of filaments and push the membrane forward.
FSCN1 activity is essential to filopodial dynamics, and it has been proposed that fascin imparts rigidity to the forming filopodia to efficiently push the membrane forwards (Vignjevic et al, 2006).
While several models proposed mechanisms of force generation by actin polymerization (see [ 48] and references therein), recent experiments based on fluorescent speckle microscopy demonstrate that actin does not directly push the membrane outwards.
Protrusion occurs by polymerization of actin filaments at the tip of the lamellipodium, thereby pushing the membrane forward [2].
The vesicle mass increases and as visualized recently the insertion of the peptide leads to mechanical forces that subsequently push circumfluent membranes [9], [18].
