The manner in which a disease develops is best referred to which of the following?

A. acute: A short-term illness with rapid onset, high fever and severe pain fits the definition of acute - sudden onset, relatively brief duration.
B. latent: Latent means hidden or in an incubation/dormant phase (no/minimal symptoms), not a rapidly symptomatic illness.
C. chronic: Chronic refers to long-lasting or recurrent conditions, not short-term, rapidly severe illness.
D. secondary: Secondary describes an illness that results from or follows another condition - it’s a causal qualifier, not a time-course descriptor.
E. manifestation: A manifestation is a sign or symptom of disease, not a type of illness itself.

A. degranulation: Mast cells initiate inflammation by degranulation, releasing histamine, heparin and other mediators that increase vascular permeability and vasodilation.
B. opsonization: Opsonization is tagging pathogens (by antibodies or complement) to enhance phagocytosis - not how mast cells initiate inflammation.
C. endocytosis: Endocytosis is cellular uptake of material; mast-cell–mediated initiation of inflammation occurs via mediator release, not endocytosis.
D. chemotaxis: Chemotaxis is directional migration of leukocytes toward chemical signals; mast-cell mediators promote chemotaxis but the initiating action is degranulation.