Answer:
The main function of viagra is to relax the muscles of the blood vessels in some areas of the body. It is used for the treatment of erectile dysfunction and for high blood pressure. The component of viagra is a competitor to the enzyme PDE5, breaking down cGMP. In the penis, blood is trapped, which results in the erection being maintained. When cGMP levels decrease, the concentration of calcium ions increases, causing smooth muscle contraction.
Explanation:
<span>The correct answer is c. Rural communities were built based on the location of available resources. This means that places that had good land for crops or good climate had communities based around crops or tobacco, while comunities based around mining would be near mountains where mines could be found. Rural communities are usually based around some natural resource like a river or a mine or anything similar.</span>
The study of the flow of energy and its transformations is called thermodynamics.
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Answer: 1, 2, 5 is the correct answer
Hello 2020 ;)
Explanation:
<span># 1 , sustainable society , heterosexual population , for population growth
#2 sustainable society , capitalism economic system , for economic growth
# 1 nonsustainable society , homosexual population , once aged out , gone .
#2 nonsustainable society, socialism economics , eventually , you run out of other peoples money .</span>
