Answer:
The Z lines and H- zone shortens during the muscle contraction.
Explanation:
Sarcomere is the area between the two Z lines. The Z- lines are present in the centre of I - band and H - zone is present in the A - band. The actin filaments which are thin filaments present in I- band and contracts, slide over the myosin filament during contraction.
The I - band, H- zones are became shortens as they are thin than the A- band. It is anisotropic band having thick myosin filaments. They are not flexible and remain in its constant shape during the muscle contraction.
After the muscle contraction, the A- band and the H- zone comes to their original shape. In other words, the sarcomere shortens and comes back during muscle contraction, and relaxation.
<u>The outer core of the Earth is a liquid layer and it is mainly made up of the metals iron and nickel. </u>
<u>It's also made up of small amounts of other substances. </u>
<u>The outer core is responsible for Earth's magnetic field. </u>
<u>The outer core is the second layer of the Earth.</u>
to examine or explain things
Somatostatin from hypothalamus inhibits the glands growth hormone
The statement which is true about the scientific method is that "it is important to follow each step in order so the results are valid." Thus, the correct option is C.
<h3>What is the Scientific method?</h3>
The scientific method may be characterized as an approach to investigation in which a problem is determined, appropriate data are collected, an assumption is composed of these data, and the hypothesis has been empirically experimented with.
Scientific methods always deal with a scripted format of identifying the problem, making a hypothesis, collecting the data associated with a hypothesis, synthesizing a methodology, observing it, and making a conclusion.
Therefore, the correct option for this question is C.
To learn more about Scientific methods, refer to the link:
brainly.com/question/17216882
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