Answer:
The correct answer is - atrophy
Explanation:
In the body, if there is a lack of body or organ movement or there is no physical movement as Mr. A doing in the given case after his injury in the leg, he refused to get off the bed and having one meal per day of biscuits and grits, he will most likely occur with his if he continues to sit or lay down one place.
Muscle atrophy takes place when there is a lack of physical activity in which legs or muscles become stiff and makes it tough to move it or do anything.
The SA Node is the heart's normal pacemaker. When the SA Node depolarizes, electrical signal spreads through the atrial muscle causing contraction.
Explanation:
Inherent rhythmicity / automaticity - The property of the pacemaker cells of the heart to start electrical sequence of depolarization and repolarization.
SA Node or Sino-atrial Node generates the electrical signal.
The electrical signal passes through internodal pathways, atrial fibres, atrioventricular node (AV Node), the bundle of His, Purkinje fibres, right bundle branch, left bundle branch.
Systole - Contraction of cells when the electrical signal of depolarization reaches the contractile cells.
Diastole - Relaxation of cells when the electrical signal of repolarization reaches the myocardial cells.
It helps with executive functions, such as behaving in socially appropriate ways.
Going too far beyond what the body can handle with vigorous exercise, especially without taking time to build up to the level of exercise, is an example of overexertion.
Doing something over and over and over again can be defined as overexertion, which is something that is done excessively (too much). Overexertion without taking a break in between, which is significant for exercising, can cause damage to the muscles and other life threatening symptoms.
