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.
Cocaine levels peak in the blood about 30 minutes after you take it. But cocaineâs action in and on the body depends upon several factors. Dosage, mode of administration, single vs. multiple use. But in general, cocaine and its metabolites stay in the system and can be detected 2-4 days after use.More on cocaine half life, peak levels, and drug testing for cocaine here. Please leave your questions or feedback about cocaine in your system in the comments section below.ut in general, cocaine and its metabolites stay in the system and can be detected 2-4 days after use. More on cocaine half life, peak levels, and drug testing for cocaine here. Please leave your questions or feedback about cocaine in your system in the comments section below.