Hormones | Back to Top. The endocrine system is a collection of glands that secrete chemical messages we call hormones. These signals are passed through the blood to arrive at a target organ, which has cells possessing the appropriate receptor.he thyroid gland is located in the neck. Follicles in the thyroid secrete thyroglobulin, a storage form of thyroid hormone. Thyroid stimulating hormone (TSH) from the anterior pituitary causes conversion of thyroglobulin into thyroid hormones T4 and T3. Almost all body cells are targets of thyroid hormones.
Cocaine generally stays in your system for about 2-4 days. In fact, this is the detection window for urine for most casual users. However, chronic or heavy cocaine users may have a much longer detection window.s with other drugs, cocaine concentrations in hair are visible for at least 90 days after dosing. However, cocaine does not leave its marks at the root of the hair, but to specific areas. That means that it is there until the hair falls out or is cut off.
According to WebMD, the length of time that cocaine will stay in your blood is about 12 hours from the time that you last use it. However, if a drug test is your concern, few people use blood tests to check for cocaine abuse because their ability to check for traces of the drug are limited to a small window.ost people will utilize a urine test because the byproducts of drugs will be in the system for days after use â for cocaine, that means that urine tests can detect cocaine for two or three days after use.