HB+Hormones

=HORMONES=


 * The Endocrine and Nervous system work hand in hand in order to regulate other systems.They do so by sending signals when they detect things that may affect homeostasis. The difference between the two is that the Endocrine uses hormones to communicate.


 * A steroid hormone is a lipid that is made of the same complex as peptides of four carbon rings because they are all derived from cholesterol. A peptide hormone are protein based hormones that is also made of carbon.


 * Neurosecatory cells in the hypothalmus produce antidiuretic hormone and oxytocin, which are stored in axon endings in the posterior pituitary until they are released.


 * The hypothalmus produces hypothalamic-releasing and hypothalmic- inhabiting homrmoes which pass to the anterior pituitary by way of a portal system.


 * The testes and ovaries produce the sex hormones. Male sex hormones are the androgens; femal sex hormones are the estrogens and progesterone.
 * The Thymus gland secretes thymosins, which stimulate T-lymphocyte production and maturation.
 * The pineal gland produces melatonin, which may be involved in circadian rythms and the development of the reproductive organs.
 * Tissues also produce hormones.
 * Kidneys produce erythropoietin
 * Adipose tissue produces leptin, which acts on the hypothalamus
 * Prostaglandins are produced within the cells and act locally.