Section 2

objectives

• Identify the relationship between the hypothalamus and the pituitary gland in the release of hormones.

• List the functions of the major endocrine glands and hormones.

• Explain the role of feedback mechanisms in maintaining homeostasis.

• Compare how negative feedback and positive feedback mechanisms are used to regulate hormone levels.

• Summarize how antagonistic hormones work as pairs to maintain homeostasis.

vocabulary hypothalamus pituitary gland thyroid gland adrenal gland epinephrine norepinephrine cortisol gonad puberty luteinizing hormone follicle-stimulating hormone estrogen progesterone androgen testosterone insulin diabetes mellitus melatonin negative feedback positive feedback figure 50-3

Endocrine glands are located throughout the body. All of these glands contain cells that secrete hormones. ln addition to the organs shown, many other organs secrete hormones.

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