Final answer:
Apoptosis is a form of programmed cell death that occurs in normal development and when cells are damaged or no longer needed.
Step-by-step explanation:
Dynamic movements are seen in cellular membranes, which are important in a variety of cellular activities. The term "diffuse laterally" describes how molecules travel laterally within a lipid bilayer to promote signalling and interactions. "Spin" refers to the way molecules in a membrane rotate around their axis.
On the other hand, "flip flop" is an uncommon occurrence that mostly happens during apoptosis. Molecules flip-flop from one leaflet of the lipid bilayer to the other, changing the composition of the membrane. Changes in membrane asymmetry during apoptosis, in particular, are linked to this uncommon process and the orderly course of programmed cell death.
Together, these membrane dynamics support cellular membranes' flexibility and usefulness in a variety of physiological settings.