Introduction to Neural and Muscular Excitation The concept of excitation forms the fundamental basis of communication within the nervous system and the initiation of movement in the muscular system. Broadly defined, excitation refers to an increase in the responsiveness or activity level of a cell, tissue, or organism, typically elicited following adequate stimulation. In cellular […]
Defining the Adrenergic Reaction The Adrenergic Reaction refers specifically to the physiological responses elicited in target organs that receive innervation from the Sympathetic Nervous System (SNS) upon exposure to the endogenous catecholamines, epinephrine (adrenaline) and norepinephrine (noradrenaline). This reaction is fundamentally crucial for immediate survival, forming the core mechanism of the classic “fight-or-flight” response. It […]