Proteins and lipids if you can select multiple
Sexual motivation for both men and women varies as a function of circulating testosterone levels.
<h3> What are hormones?</h3>
Hormones are defined as chemical substances that function as a messenger molecules in the body.
Hormones are produced in a particular part of the body and later travelled to the other parts of the body.
Testosterone is a hormone which is responsible for physical relationships and play a vital role in body. In men it plays a vital role in fat distribution, muscle mass and in the production of sperm as well as red blood cell.
Therefore,sexual motivation for both men and women varies as a function of circulating testosterone levels.
Learn more about testosterone here:
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<em>Answer:</em>
<em>A group of cells working together is defined as a tissue and several tissues working together comprise an organ. ... The heart is used as an example of an organ which is made up from muscle and valve tissue.</em>
<em>Explanation:</em>
Water enters the soil in a process through infiltration