The circadian clock is most sensitive to light from about 2 hours before usual bedtime and through the night, until about 1 hour after usual wake-up in the morning (this is the sensitive period). Exposure to light during these times will affect when your body naturally gets sleepy and is ready to fall asleep.
Palpating the client's neck or their face is the best method for the detection of subcutaneous emphysema.
<h3>What is subcutaneous emphysema? </h3>
When air enters the tissues under the skin, it causes subcutaneous emphysema. This is most common in the surrounding skin the chest or neck, however it can develop in other areas of the body as well.
Subcutaneous emphysema is frequently shown as a smooth swelling of the skin. When a health care professional palpates the skin, the gas is forced into the tissue, causing a peculiar cracking feeling (crepitus).
Therefore, palpation of the neck or the face is the best method that can be employed for the detection of subcutaneous emphysema.
Read more about subcutaneous emphysema, here
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They are all used for energy, etc.
Hope this helps.
Answer:
in controlled experiment an independent variable is systematically manupulated and dependent variable is measured ; any extraneous variables are controlled
