<span>Muscle tone that is abnormally high and that increases during activity is characteristic of MUSCLE HYPERTROPHY. Muscle hypertrophy occurs when muscles develop micro-tears within the tissues. As these micro-tears develop, they become scar tissues that make-up muscles into the strong and sturdy characteristics that they have.</span>
Answer:
Kenji must conduct a scientific investigation for a science project. Which step should Kenji complete first?
Develop a testable question based on research or prior knowledge.
Explanation:
scientific method
Answer:
Sinoatrial Node
Explanation:
The sinoatrial node is like the natural pacemaker of the heart because it controls the heart beat or in other words, the cardiac rhythm. The sinoatrial node is found on the right atrium and it sends signals to both atria and then they contract. The signal is then carried to the atrioventricular node which spreads the signal to the ventricles and then the ventricles contract. The contractionof the ventricle is the pumping action of the heart.
Answer:
Explanation:
Placoderms were the first jawed fish; their jaws likely evolved from the first of their gill arches. in spanish
placodermos
