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.
Both types of stress lead to overactivity of the body's stress-response mechanism. Sustained or chronic stress, in particular, leads to elevated hormones such as cortisol, the stress hormone, and reduced serotonin and other neurotransmitters in the brain, including dopamine, which has been linked to depression.