These hormones include thyroid-stimulating hormone (TSH), adrenocorticotropic. Important hormones released into the bloodstream include ADH (anti-diuretic hormone), adrenaline and insulin. There are four hormones secreted by the anterior pituitary gland that control the functions of other endocrine glands. The body produces a range of different chemical hormones that travel in the bloodstream and affect a number of different organs or cells in the body. This pathway will be discussed in more detail below. These hormones can also act on other glands to stimulate the release of different types of hormones and bring about effects. ACTH then stimulates the adrenal cortex to produce the hormone cortisol. The outer region is called the adrenal cortex. It secretes several hormones into the blood in response to the body's condition, such as blood water levels. Adrenal glands are small, triangular glands that sit on top of each kidney. The pituitary gland in the brain is known as a 'master gland'. There are important differences between nervous and hormonal control. Hormones can control the body, and the effects are much slower than the nervous system, but they last for longer. Once a hormone has been used, it is destroyed by the liver. One of its target organs is the heart, where it increases the heart rate. An example of this is the release of the hormone adrenaline, which is released by the adrenal gland. Human endocrine system Hormones and nervesĪ hormone is a chemical substance, produced by a gland and carried in the bloodstream, which alters the activity of specific target organs.
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