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<p>As mentioned in previous pages of the tutorial, <em><a href="/dictionary/hormone">hormones</a></em> are produced in the <em><a href="/dictionary/endocrine_gland">endocrine glands</a></em> of animals. The <em><a href="/dictionary/pituitary_gland">pituitary gland</a></em> and <em><a href="/dictionary/hypothalamus">hypothalamus</a></em> are the most important in regards to control and <em><a href="/dictionary/development">development</a></em>.</p> <h2>Somatotrophin - Growth Hormone</h2> <p>The pituitary gland is responsible for the production of a hormone called somatotrophin. Somatotrophin is essential in the fact that it promotes mass production of proteins on a body-wide scale, by accelerating the rate of transport of amino acids; the constituents of a protein.</p> <h2>Thyroid Stimulating Hormone</h2> <p>The same part of the pituitary gland is responsible for thyroid stimulating hormone, or TSH for short. This targets the thyroid gland, also a member of the endocrine system, which in turn promotes the production of thyroxine</p> <h2>Thyroxine</h2> <p>Thyroxine is responsible for controlling the body's metabolic rate, and therefore responsible for the amount of energy consumed and the volume of proteins produced.</p> <h2>Growth Extremes</h2> <p>The over production of somatotrophin can cause gigantism while under production can result in dwarfism. If the substance is over produced during adulthood, the person grows overly big jaws, hands and feet, a condition known as <em><a href="/dictionary/acromegaly">acromegaly</a></em>.</p> <p>The next page investigates hormones in plants...</p>
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