Which of the following correctly describes the functions of the endocrine system?

a. Transport of blood through the body and through the lungs

b. Regulation of body functions through hormone secretion

c. Regulation of body functions through nerve impulses

d. Immunity and returning extra tissue fluid to the blood vessels

Video transcript

Hi, everyone. Let's take a look at this practice problem together, which of the following hormones produced by the endocrine system is involved in the development and function of the immune system. The answer options are a aldosterone B, thymosin C, dopamine and D insulin. Let's just go ahead and dive right into these answer options and discuss them. Option. A aldosterone recall that this hormone is secreted by the adrenal glands. It helps to manage sodium and potassium levels and it also helps to regulate blood pressure. It's not involved in the immune system. So we can eliminate option a option C dopamine, dopamine is both a neurotransmitter and a hormone. So, as such, it acts as a chemical messenger in the brain. So we can also eliminate option C option D insulin recall that this hormone is important for regulating blood glucose levels as well as playing a role in metabolism. So, insulin is not the correct answer either. So, thymosin is the correct answer and this is a hormone produced by the thymus gland. It is involved in stimulating T cell production. So it is involved in the development and function of the immune system. T cells are specific white blood cells. So the correct answer is option B thymosin. All right, everyone. I hope you found this helpful and I'll see you soon for the next practice problem.