A&P 102 Final Exam

Endocrine glands differ from exocrine glands in that endocrine glands? - Secretes hormones directly into a body fluid What is a hormone? - A chemical messenger that affects the functioning of certain cells in the body What endocrine gland is also considered an organ of the immune system? - Thymus gland What is a false statement about steroid hormones? - Their receptors are located on the cell membrane of their target cells What is a secondary messenger system of hormone action? - A method used by certain hormones to exert their effects on their target cells, often involving the activation of adenylate cyclase What method of regulation does the hypothalamus use to control hormone release from the anterior - It secretes releasing or inhibiting hormones into the hypophyseal portal system One method of regulating hormone secretion in the body is by the concentration of various ions or other substances in the body fluids. Which hormone is regulated by the concentration of Ca+2 in the blood? - Parathyroid hormone What is a false statement concerning negative feedback? - It is the regulatory method used by the hypothalamus to control epinephrine secretion Which hormone is secreted in response to secretion of GnRH? - FSH and LH GHRH is synthesized by the what and its target organs is/are? - Hypothalamus; anterior lobe of pituitary gland Thyroid gland - Calcitonin anterior pituitary gland - PRL Hypothalamus - Oxytocin Kidney - Calcitriol Adrenal gland - Cortisol What is one hormone not synthesized by the pancreas? - Melatonin What would lead to an increased secretion of CRH? - A tumor on the pituitary gland that caused decreased secretion of all anterior pituitary hormones What would lead to increased secretion of TSH? - A significant decrease in the blood level of thyroxine CRH causes it's target cells to secrete more? - ACTH Receptors for the hormone PTH are found on the? - Bones, kidneys, small intestine Which hormone is with this target: Anterior pituitary gland - MSHIH Which hormone is with this target: Most cells of the body - Thyroxine Which hormone is with this target: Kidneys - ANH Which hormone is with this target: All body cells, especially bone, muscle, cartilage, liver - GH Which hormone is with this target: Thyroid gland - TSH What is a false statement concerning glucose balance in the body? - Cortisol decreases blood glucose in times of stress What is a false statement concerning the hormone triiodothyronine? - It's targets are skeletal muscle cells, cartilage, and bone What is a false statement concerning the hormone, renin? - It inhibits the secretion of both ADH and Aldosterone