Answer:
Explanation: Physical activity contributes to your personal well-being in many different ways. Exercising for example, helps your heart stay strong and your body. When your heart is healthy and your fit, your emotions and confidence change in good ways. You feel more comfortable going out, instead of going out being shy you go out with 100% confidence.
Answer: During Puberty
Explanation: Once puberty begins, the body starts to produce different chemicals that activate the testes to make testosterone and the ovaries to produce estrogen.
Another name for helper T cells is CD4+ (now options are correct), it is due to the presence of specific cell surface receptors.
<h3>What are T cells?</h3>
T cells are also called CD4- + positive cells have essential functions in the immune system by triggering adaptive immune responses.
These cells CD4- + positive cells contain specific cell surface receptors that can be identified by biochemical analyses.
In conclusion, another name for helper T cells is CD4+ (now options are correct), it is due to the presence of specific cell surface receptors.
Learn more about T cells or CD4+ cells here:
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Science and technology is co-related with health, population and environment. They are the significant means of development process. It's making the human life more comfortable and productive invention of various technology has made the treatment of health easy and reliable.
