They are usually the most irritating line of defense and the body's reaction to a potential contaminant.
For example, when one touches poison ivy, the body will release histamines to react to the allergen. A blotchy red patch will appear on the skin (possibly several). An anti-histamine, like Benadryl, can help clam these symptoms.
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An embryo transitions into a fetus at about week 9 during a pregnancy.
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In the first three months the </span>embryo<span> goes through organogenesis and develops bodily organs, its heart starts beating after the fourth week, brain waves can be monitored after six weeks, and by the eighth week all major body parts are present. After the eight weeks, the embryo becomes a fetus.
(Sorry, I know these aren't the answer choices, but I hope this helps)</span>
Two people with different body sizes want to compare their strength levels when lifting the same object. For a fair comparison, what should they measure?
I believe the correct answer for this question is who can lift the longest :)
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