The right answer is Electrocardiography (or Electrocardiogram).
In a typical plot, one can notice five characteristic waves. They are called P, Q, R, S and T. The illustration below shows what a normal electrocardiogram looks like:
* the P wave marks the depolarization during the contraction of the atria;
* the PR interval indicates the time required to transmit the electrical impulse of the sinus node of the atria to the ventricular muscles;
* the QRS complex marks depolarization and ventricular contraction;
* the QT interval corresponds to the global ventricular repolarization;
* T wave refers to the end of ventricular repolarization.
Answer: An undersupply of serotonin is most closely linked to <em>depression</em>.
The correct answer is D; depression.
Explanation:
Serotonin is a naturally produced chemical in the human body. When the body is not producing serotonin a person can start having numerous symptoms. One of the symptoms is depression. This chemical is also known as the "happy chemical" since it affects the mood, happiness, and a person's overall well being.
When the body isn't producing this chemical, people may become hungry and crave sugar, they may have issues with being hot or cold all the time, and have trouble sleeping.
To raise serotonin levels there are several things that can be done. a few of these things are; taking a walk in the sunshine, changing your diet, get a good night's sleep, take vitamin D, and try to lower stress in your life.
C. avoiding friends and family
I would say that the second option makes the most sense. It is always best to begin with a lighter weight to perfect your technique, and start with only a a couple sets 2-3 days a week. Over time, Ashlee will build strength and be able to lift more weight safely.
The skeletal works with the muscular system to help the body move, hope that helps
