What is the first event of an action potential

answer:

depolarization

Explanation:

The activation gates of voltage-gated Na+ channels open, and Na+ diffuses into the cytoplasm. What characterizes depolarization, The first phase of the action potential? The membrane potential changes from a negative value to a positive value.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes