Chapter 13 - Endocrine Glands
Endocrine glands synthesize and secrete products, called hormones, into the blood where they are transported to other tissues. They bind with receptors on target cells and alter their function.
The pituitary gland produces and regulates hormones that affect processes throughout the body.
The thyroid gland produces hormones that primarily influence the metabolic rate and protein synthesis. It is unique in that it stores its hormones extracellularly in large follicles.
The parathyroid glands secrete parathyroid hormone that regulates the amount of calcium in the blood and within the bones.
The adrenal glands produce a variety of hormones including adrenaline and the steroids aldosterone and cortisol.
Pancreatic islets (or islets of Langerhans) are 'islands' of endocrine cells located within the pancreas. They secrete hormones (insulin and glucagon) important in regulation of glucose in the blood.