Elasticity Flashcards
Elasticity
The property of a body that tends to return the body to its original shape after the force is removed
Hooke’s Law
For relatively small deformation of an object, the displacement or side of the deformation is directly proportional to the deforming force or load. (under these condition the object returns to its original shape and size upon removal of the load)
Cardiovascular system
elasticity is an important property that allows our vessel’s to function properly
Arteries
Receive blood that is pumped away from the heart under pressure - this stretches arterial walls
Elastic fibers in arterial walls
ensure that the vessel returns to its original shape
Arterial Elasticity
keeps pressure on the blood inside, smoothing out the flow of the blood even when the heart relaxes; this pressure keeps the blood moving
Elastic Recoil
Keeps blood moving through the capillaries - without it, the heart would have to work much harder
Arteriosclerosis
A disease in which arteries lose elasticity as their walls became stiff and inflexible; often as a result of high blood pressure exerting excess force against the arterial walls (as we age we lose elasticity: “fibrotic”)
Atherosclerosis
Is a disease that begins with inflammation and causes arteries to become blocked
Atony
Muscles lose their elasticity and thereby, strength of muscles is the reason why atony is considered dangerous
How do you increase elasticity in your muscles?
Not clear that it is possible.
- Muscles are connected to tendons (that are connected to bones).
-Muscles and tendons work together.
-When one uses stretching exercises to increase flexibility, one is actually always stretching muscles along with tendons. It is not really possible to separate them.
Three types of stretching
- Static
- Dinamic
- Balistic
Static Stretching
Holding a position
ex: pike stretch
Dinamic stretch
An actvity
Ballistic stretch
Stretching + a movement/bounce
