In a collision, a force acts upon an object for a given amount of time to change the object's velocity. The product of force and time is known as impulse. The product of mass â¦ and velocity change is known as momentum change. In a collision the impulse encountered by an object is equal to the momentum change it experiences.Impulse = Momentum Change.
In addition to the locus coeruleus existing as a source of the neurotransmitter norepinephrine within the central nervous system, the adrenal gland can also release norepinephrine during a stress response into the bodyâs blood stream, at which point norepinephrine acts as a hormone in the endocrine system.
When the body experiences a stress response and/or is overly stressed, however, a number of conditions change, including: 1  The bodyâs muscles become tighter (stress hormones cause muscles to tighten). 2  The electrical activity in the brain increases. 3  The nervous system behaves more involuntarily and erratic.