2. Hypothalamus Pituitary Thyroid gland Parathyroid gland Adrenal medulla Adrenal cortex Ovary in female Testis in male Pancreas

7. Blood calcium levels decreased Blood calcium levels increased Parathyroids PTH Intestine Thyroid Calcitonin Ca 2+ absorbed to blood Kidney Ca 2+ excreted Ca 2+ released to blood Bone Ca 2+ absorbed Thyroid and Parathyroid Hormones

11. Example of endocrine control Low blood sugar is detected Hypothalamus stimulates pituitary to release hGH Pituitary hGH stimulates liver to convert glycogen into glucose and releases glucose into blood Increased sugar in blood signals back to hypothalamus to slow stimulation of pituitary