The Earth rotates constantly and is exposed to the sun in different intervals & time periods - Thus, people need to establish a time zone to state when & where the sun rises as well as sets during daytime. <span>
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The P wave of the electrocardiogram is considered as a signal from the DEPOLARIZATION of the atria in the heart. This depolarization drives the contraction of the atrial musculature.
An electrocardiogram (ECG) is a device that records the electrical activity of the heart. This record can then be used to diagnose different heart conditions.
The P waves occur when the sinoatrial node generates an action potential which is capable of depolarizing the atria.
This depolarization is then followed by atrial contraction and an increase of the pressure in the atria.
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Answer:
- <em>Two major categories of mutations are germline mutations and somatic mutations.</em>
<em>Germline mutations occur in gametes. These mutations are especially significant because they can be transmitted to offspring and every cell in the offspring will have the mutation.</em>
<em>Somatic mutations occur in other cells of the body.</em>