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BIOL 1010 (76)
Chapter 27

BIOL 1010 Chapter 27: Topic 27.11

3 Pages

Biological Sciences
Course Code
BIOL 1010
Emily A.Mc Kinnon

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OS82 Bio 1010 Growth Hormone promotes protein suntehsis and the use of body fat for enerfy metabolism in a wide variety of target cells. Promotes the development and enlargement of all parts of the body. The timing of release is controlled remains poor understood. If there is a problem it can lead to Dwarfism. Endorphins are other hormones produced by the anterior pituitary as well as other parts of the brain, are the bodies natural painkillers. These chemical signals bind to receptios in the brain and dull the perception of pain. The hypothalamus operates through the anterior pituitary to direct the activity of an endocrine organ, the thyroid gland. The hypothalamus secretes a releasing hormone known as TRH in turn it stimulates the anterior pituitary to produce thyroid stimulating hormone. Under this influence the thyroid secretes the hormone thyroxine into the blood. Thyroxine is converted to another hormone that increases the metabolic rate of most body cells, warming the body as a result. Precise regulation of the TRH-TSH-thyroxine system keeps the hormones at levels that maintain homeostasis. 29.6: Thyroid Gland is located in your neck just under you larynx. The hormones perform several important homeostatic functions that affect virtually all the tissues of the body. It produces two very similar amine hormones both which contain iodine. Thyroxine T4 because it contains 4 iodine atoms and triiodothyronine T3 because it contains only three. In target cells most T4 is converted to T3. A crucial role is the development of maturation. They are important in mammals especially in bone and berve cell development. They also help to maintain normal blood pressure, heart rate, muscle tone, digestion, and reproductive function. Th
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