1. The steroid hormones are all derived from cholesterol. Moreover, with the exception of vitamin D, they all contain the same cyclopentanophenanthrene ring and atomic numbering system as cholesterol.The particular steroid hormone class synthesized by a given cell type depends upon its complement of peptide hormone receptors, its response to peptide hormone stimulation and its genetically expressed complement of enzymes.
2. Endocrine System
3. Hormones do many things. They regulate metabolism. Metabolism is all of the chemical and energy reactions that happen in a living thing. Hormones cause the growth and death of cells and of whole organisms. (Another word for a living thing like a plant or an animal is an organism.) Hormones also start and control sexual development. For example, the hormones estrogen and progesterone make girls start puberty. Hormones help keep homeostasis in an organism. Homeostasis means to keep a constant state inside the body like temperature, amount of water and salts, and amount of sugar. Hormones released by one gland can also tell other glands to make different hormones.
4. Fever is negative feedback
5. This area of the brain controls the pituitary gland and other glands in the body.
6. The pituitary gland is a tiny organ, the size of a pea, found at the base of the brain.
7. Antidiuretic Hormone: Functions
*Regulates blood osmolarity (most important function) -Causes kidneys to reabsorb water into the blood, which decreases blood osmolarity *Regulates blood pressure (minor function) -Increases blood volume, which increases blood pressure -Causes vasoconstriction, which increases blood pressure
8. Alcohol prevents anti-diuretic hormone release which causes an increase in urine production and dehydration..
9. Oxytocin is a mammalian hormone that has many functions, the most notable having to do with pregnant or lactating mammals.
10. Too much growth hormone-releasing hormone production may be caused by hypothalamic tumours or by tumours located in other parts of the body (ectopic tumours). The consequence of too much growth hormone-releasing hormone is a rise in growth hormone levels in the bloodstream and, in many cases, enlargement of the pituitary gland.
If the hypothalamus produces too little growth hormone-releasing hormone, the production and release of growth hormone from the pituitary gland is impaired, leading to a lack of growth hormone (adult growth hormone deficiency). When a deficiency of growth hormone is suspected, a ‘growth hormone stimulating test’ is performed using growth hormone-releasing hormone or other substances, in order to determine the ability of the pituitary gland to release growth hormone.
11. abnormal growth of the hands, feet, and face, caused by overproduction of growth hormone by the pituitary gland.
12. Taller people tend to have larger muscle mass and it may be that the speed of blood flowing into the muscle mass is therefore slower.
13. In the base of the neck
14. Iodine is an element that is needed for the production of thyroid hormone. The body does not make iodine, so it is an essential part of your diet. Iodine is found in various foods . If you do not have enough iodine in your body, you cannot make enough thyroid hormone. Thus, iodine deficiency can lead to enlargement of the thyroid hypothyroidism and to mental retardation in infants and children whose mothers were iodine deficient during pregnancy.
15. The thyroid gland is a butterfly-shaped endocrine gland that is normally located in the lower front of the neck. The thyroid’s job is to make thyroid hormones, which are secreted into the blood and then carried to every tissue in the body. Thyroid hormone helps the body use energy, stay warm and keep the brain, heart, muscles, and other organs working as they should.
16, Hyperthyroidism is a disorder in which your thyroid gland makes and releases more thyroid hormone than your body