A&P 102 Final Exam Ivy Tech Questions & Answers Already Graded A+

Who regulates pituitary gland secretion? - Answer-hypothalamus What is a hormone and how does it act? - Answer-Hormones are chemical messengers that are responsible for regulation. They are secreted into body fluids, mainly blood. It has specific actions on target tissues, which are any tissue that has specific receptors for that particular hormone. Compare and contrast glucagon and insulin. - Answer-Glucagon stimulates the liver to break down glycogen and convert noncarbohydrates into glucose and it stimulates the breakdown of fats. Insulin promotes the formation of glycogen from glucose, inhibits conversion of noncarbohydrates into glucose, and enhances movement of glucose through adipose and muscle cell membranes, decreasing blood glucose concentration and promotes transport of amino acids into cells, as well as enhances synthesis of proteins and fats. Both work to keep blood glucose concentration constant, but glucagon breaks down glycogen into glucose and insulin forms glycogen from glucose. How are pheromones different than hormones? - Answer-is a chemical signal sent between members of the same species. Are a type of hormone that are released in small quantities and play a big role in physical attraction between people. How is inhibin used in the body? - Answer-Inhibits the anterior pituitary gland by negative feedback. This action prevents over secretion of FSH. It is secreted by cells of the testes and ovaries. FSH is secreted by anterior pituitary gland. It is a glycoprotein hormone. Differentiate between paracrine, autocrine, endocrine, and exocrine glands. - Answer-Paracrine - hormones enter the interstitial fluid but affect only neighboring cells. Autocrine - hormones affect only the secreting cell. Endocrine - hormones are secreted from the interstitial fluid into the bloodstream and act on target cells. Exocrine - secretions enter tubes or ducts that lead to body surfaces.Describe steroid hormones. - Answer-Sex hormones and adrenal cortex hormones. Steroid hormones diffuse through cell membranes and enter cytoplasm or nucleus. Then they combine with a receptor molecule, which together bind to DNA and promote transcription of messenger RNA. mRNA enters the cytoplasm and directs protein synthesis. Newly synthesized proteins produce hormone's specific effects. Describe tropic hormones. - Answer-They stimulate the activity of endocrine glands than those secreting them. Describe normal blood: number of each cell type, pH. - Answer-Describe normal blood: number of each cell type, pH. CLICK THE CARD TO FLIP IT Blood is about 8% of body weight. Adult blood volume is about 5 L. RBC count is usually 4,600,000- 6,200,000 in males, 4,200,000-5,400,000 in females. WBC are usually 5,000-10,000 per cubic mm of blood. Platelets are usually 130,000-360,000 per cubic mm of blood. Normal blood pH is around 7.4. How does the Rh factor affect a developing fetus and its mother? - Answer-Rh positive - presence of antigen D or other Rh antigens on the RBC membranes. Rh negative - lack of these antigens If a mother is Rh negative and her baby is Rh positive, her antibodies form to fight Rh-positive blood cells. If a mother is Rh positive and her baby is Rh positive, her antibodies attack the baby's RBC. Complications can lead the baby to develop erythroblastosis fetalis or hemolytic disease. What antigens can be found on RBC? What antibodies can be found in the plasma? How do these create different blood types? - Answer-Type A blood has A antigens on its cell surface and anti-B antibodies in its plasma. Type B blood has B antigens on its cell surface and anti-A antibodies in its plasma. Type AB blood has both A and B antigens on its cell surface and no antibodies in its plasma. (It is the universal recipient). Type O blood has no antigens on its cell surface, but has both anti-A and anti-B antibodies in its plasma. (It is the universal donor). Describe the different leukocytes and their origins. - Answer-Neutrophils Eosinophils BasophilsMonocytes Lymphocytes Compare the formed elements of the blood. - Answer-RBCs, WBCs, and platelets all act together to maintain life. RBCs transport oxygen to the body's tissues, WBCs fight infections in the body, and platelets clot wounds that occur.