Bio 202 Endocrine System Labpaq Exp Essays

Bio 202 Endocrine System Labpaq Exp Essays Bio 202 Endocrine System Labpaq Exp Essay Bio 202 Endocrine System Labpaq Exp Essay Section: Bio 202 labpaq rep 01 lab report: ENDOCRINE SYSTEM You must get all parts of the question correct to get credit for the question Step 1 (Can be observed on the following slides, either from your lab kit or from the Labpaq web site ( labpaq. com/ex-1-endocrine-system)). List the following:  ·Location in the body of the following structures  ·Slide #/location observed  ·One hormone secreted by each Please pay special attention to properties like shapes, sizes, colors, textures, relationships among structures, plus any interesting or identifiable features. You may want to make drawings of slides so that you would be able to identify this tissue in the future. Pituitary gland: it’s a pea sized gland located at the base of the brain (center of skull) near the optic nerves. It secretes various hormones one example is the GH – growth hormone. Observed at labpaq web site (pituitary Anterior lobe) Basophils, Acidophils and Chromophobes where observed. Thyroid gland: is a butterfly shaped gland, located in front of the trachea , secreting hormones T3 triiodothyronine and T4 thyroxine. Observed at the labpaq website and noted in the slide the thyroid follicles, colloid, and simple cuboidal epithelium and C cells. Parathyroid gland: is located behind the thyroid. It secretes parathyroid hormones PTH that regulates calcium and phosphate. Observed at labpaq website Chief cells and oxyphil cells were noted. Thymus gland: it lies under the sternum and above the trachea in the mediastinum it secretes also thymosin. Labpaq website. Noted the medulla, cortex, and Hassall’s corpuscles from infant thymus. Adrenal gland: Located on the top of the kidneys, it secretes epinephrine slides viewed at labpaq website it was noted connective in the capsule and next to it the adrenal cortex, adrenal medulla and cells and blood vessels. Step 2: Abbreviations-  ·Give the full name of these hormone abbreviations  ·Name the gland that secretes it. 1. ADH Antidiuretic hormone / vasopressin if too little of that hormone it causes diabetis insipidus secreted by the Pituitary. 2. FSH Follicle stimulating hormone, produce sperm for males and ovulation in females secreted by the pituitary gland. . LH Luteinizing Hormone , regulates testosterone and estrogen levels , secreted by the pituitary. 4. NE norepinephrine function as both hormone and neurotransmitter secreted by the adrenal medulla in the adrenal gland . 5. TSH Thyroid stimulanting hormone, stimulates thyroid gland , secreted by the pituitary gland. Step 3: Answer the following questions (1 point each): Figure 1. 1. The pancreatic structures highlighted in blue in Figure 1 secrete all of the following EXCEPT: C a. Insulin b. Glycogen c. Pancreatic Polypeptide X d. Glucagon 2. Name the 3 cell types numbered in Figure 2 and name the major function of each. Figure 2. 3-In your own words, describe the clinical differences between hypothyroidism and hyperthyroidism. Hypothyroidism basically means that is not enough thyroid hormones in the body while hyperthyroidism means that is too much of thyroid hormones in the body. In both cases it causes an unbalance of hormones for proper homeostasis. 4. List three physiological effects of calcitonin. Stimulates bone deposition in kids while suppress bone resorption by inhibiting osteoclasts. Controls release of calcium and phosphorus in the bloodstream Also opposes effects of the PTH on Ca2 levels 5. What role does parathyroid hormone play if there are low calcium levels? It will raise the Calcium level in the blood by stimulating bone resorption while inhibiting bone deposition. 6. Is the thymus more efficient in younger or older populations? What is the implication of this? The thymus gland plays a hole in 3 systems: endocrine, lymphatic and immune, it grows on us until when we are about 6 years old and then it starts shrinking. So yes, it is more efficient in younger people than in old people, the implication of this is that as we age and it shrinks it also becomes more fatty and less granular losing most of its power, it also contains lymphocytes and thymosin hormones, when the thymus shrink and lose its ability to aid the immune system we get sick, lymphocytes are diminished, so our response against antigens is very weak. 7. How is the adrenal medulla tied into the â€Å"fight or flight† response? Because it also plays a role as a ganglion in the sympathetic nervous system, which is the fight to flight system, the SNS releases NE / adrenaline that kicks in when we are in dangerous or very stressful situations 8. In your own words, what are functional differences between glucocorticoids and mineralocorticoids? They are both corticosteroids , but the mineralocorticoids is responsible for regulanting the electrolytes balance in the body while the glucocorticoids regulates the metabolism of glucose and carbs , lipids etc†¦ 9. What are the differences between the endocrine and exocrine functions of the pancreas? Exo â€Å"outside† end â€Å"within† basically means that the exocrine will secrete digestive enzymes into the intestines while the endocrine part will release insulin into the bloodstream 10. What are the physiological effects of testosterone, estrogen, and progesterone? Sex steroids, the adrenal glands produce testosterone, progesterone and estrogens in both men and woman. Testosterone it has anabolic and androgenic effects, it increases the growth of muscle and bones, and the maturation of sex organs ( especially in men) maintains the sexual desire in both , men and woman; however women have a little less than men. Progesterone aids in woman ovulation and it lessen when in menopause, it also promotes well being sensation such as aiding in sleep has a calming effect and aids in fat metabolism, stimulate new bone formation, restore O2 level in cells, restore libido for both men and woman. Estrogen: there are 3 different hormones in this class: estrone, estradiol and estriol. They affect the mood on both men and woman by increasing serotonin. It also increases body fat, creates progesterone receptors, increase blood clothing, reduce the libido, and reduce O2 levels in cell etc†¦