The right answer is the first phase of the general adaption syndrome.
The concept of stress was introduced by Hans Selye. He describes the mechanism of the adaptation syndrome, that is to say all the modifications that allow an organism to bear the consequences of a natural or operative trauma.
In fact, it is the double-perception of a state of divergence between a demand for adaptation at a given moment and the ability to cope with it. It is an energy expenditure. It can be positive or negative.
The stress syndrome evolves in three successive stages:
*"Alarm reaction": the defense forces are mobilized
*"Resistance stage": adaptation to the stressor
*"Stage of exhaustion": inexorably reached if the stressor is sufficiently powerful and acts a long time.
Answer:
Atherosclerosis would be the occlusion.
What anastamosis is maintaining blood supply to the brain and by what routes?
●Collateral Circulation
●Collateral Willis
Explanation:
Atherosclerosisis affects arterial blood vessels by causing a thickening of the arteries by multiple plaques within the arteries.
Collateral Circulation best shows why there was adequate and necessary blood flow to the brain.
In Collateral Circulation closed smaller arteries links and connect to two bigger arteries or certain points of the same artery acting as another way of blood supply.
Collateral vessels are often closed but in people with coronary heart disease or stroke, it will expand and increase.
Note: there is something called collateral Willis referring to the choice of it remain close in some people and being open in some people.
Nucleosynthesis is the answer
