An Interface Control Document (ICD) describes the relationship between system components in terms of data items and messages passed, protocols observed and timing and sequencing of events.se this template to: Describe the interface(s) to a system or subsystem. Describe the inputs and outputs of a single system, the interface between two systems, the interface protocol from the lowest physical elements to the highest logical levels.
In the most basic terms, the function of norepinephrine is to mobilize the brain and body for action. Norepinephrine release is lowest during sleep, rises during wakefulness, and reaches much higher levels during situations of stress or danger, in what has been called the fight-or-flight response.n the sympathetic nervous system norepinephrine is used as a neurotransmitter by sympathetic ganglia located near the spinal cord or in the abdomen, and is also released directly into the bloodstream by the adrenal glands.
Lesson Summary. Norepinephrine is a neurotransmitter secreted by neurons in the sympathetic nervous system. This chemical is secreted in response to stress, which triggers the 'fight or flight response.' The release of norepinephrine causes several changes that help our body to work more efficiently.orepinephrine is a neurotransmitter that is secreted in response to stress. Learn about what norepinephrine is and how it affects the body. Additionally, discover what drug contains norepinephrine and if it is safe to use.