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The muscle fibres are contracting
Microscopically you could be seeing sacromeres. Otherwise, these streaks are called striations.
No, the length of the muscle fibers does not change. In isotonic movements is when the length changes.
Physicians monitor a patient's enzyme levels if they suspect that the patient is having a heart attack because changes happen over time in blood levels of heart enzymes indicate the heart muscle's health.
They get alot taller and really fill out muscle and weight wise.
Not inherently, no. Stretching a muscle means that the muscle is lengthening, it is stretching from a given position of shortness. Muscles CAN tear during a stretch, this is certainly a risk. This depends on a lot of factors, like how far it is being stretched, the amount of passive tension in the muscle, the amount of active tension, the speed of the stretch, the amount of external force (if any) being used, the stability, the joint alignment, etc.
N. J. Beraquet has written: 'Physical changes during the heating of herring muscle'
The chemical changes during muscular contractions include conversion of ATP into ADP, break-down of phosphocreatine and muscle glycogen, formation of Fructose diphosphate and lactic acid and resynthesis of creatine phosphate.
So a heart-attack is a result of a block artery. This blockage can prevent blood flow to the muscle of the heart. If this is the case, the muscle ca become damaged. So to answer your question, the vessels are not necessarily getting damaged during a heart attack. It's the muscle. However there are three vessel the supply the heart with blood. Below is each vessel and the muscle wall that could be damage in a heart-attack. Right Coronary Artery(RCA): Inferior wall Left Anterior Descending (LAD): Anterior Wall Curcumflex(Cx): Lateral wall
Not from the heart attack itself. In a heart attack, the heart is deprived of oxygen from the blockage of a coronary artery. This does not usually cause bleeding, but it does cause the death of the muscle cells if they don't get oxygen.
A Spaz Attack is when someone is Physically out of control and just freaking out. Spaz Attack is slang for Muscle Spasm. Muscle Spasms are uncontrollable in physically handicapped people when the brain is not able to control the muscles.
cardio muscle