Final answer:
The QRS complex wave is associated with ventricular depolarization, not atrial depolarization. The normal P-R interval is about 0.12 to 0.20 seconds. Myocardial infarction is commonly known as a heart attack. An ischemic event does not lead to strengthening of the heart muscle. Both skeletal and cardiac muscle tissue do exhibit an extended plateau phase following depolarization, but it is more prominent in cardiac muscle tissue.
Step-by-step explanation:
The QRS complex wave is associated with ventricular depolarization, not atrial depolarization. The P wave represents atrial depolarization. Therefore, option a is false.
The normal P-R interval is actually about 0.12 to 0.20 seconds, not 0.4 seconds. Therefore, option b is false.
Myocardial infarction is commonly known as a heart attack. It occurs when there is a blockage in the blood supply to the heart, leading to damage of the heart muscle. Therefore, option c is true.
An ischemic event refers to a decrease in blood supply to an organ or tissue. In the case of a heart muscle, this can lead to weakening or damage of the muscle, not strengthening. Therefore, option d is false.
Both skeletal and cardiac muscle tissue exhibit a plateau phase following depolarization, but it is more prominent in cardiac muscle tissue. This plateau phase allows for a longer contraction and helps coordinate the pumping action of the heart. Therefore, option e is false.