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Endocrine
final exam
61
Biology
05/10/2012

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Term
Where is ADH and Oxytocin made specifically? Where are they then stored?
Definition
ADH-made in suproptic nucleus within the hypothalamus. Oxytocin-paraventricular nucleus in the hypothalamus. Both are stored in the Posterior pituitary.
Term
What affect would diabetes insipidus have on urine and blood volumes? What affect on specific gravity?
Definition
Increase urine production and decrease blood volumes. It would also increase specific gravity
Term
What produces releasing hormones?
Definition
Hypothalamus
Term
Where is the primary set of capillaries in relation to the endocrine system located?
Definition
Hypothalamus
Term
Where are the secondary set of capillaries located?
Definition
Anterior pituitary
Term
What is TSH?
Definition
Thyroid stimulating hormone
Term
What is an agonist for endorphin receptors? What is the normal function of endorphins?
Definition
Morphine a derivative of opium. Body's natural pain killers and feelings of pleasure and euphoria.
Term
What is the disease associated with not enough ADH?
Definition
diabetes insipidus
Term
What is GH? STH? What's the difference?
Definition
Growth Hormone. Somatotropic Hormone. Nothing. Same thing.
Term
Describe the Growth Hormone Axis
Definition
Hypothalamus-RH-Anterior Pituitary-GH-Liver-Somatomedin-targets
Term
What does GH/STH increase?
Definition
Production of Proteins
Term
What area in bone do you think responds to somatomedin? cells?
Definition
plate. Chondrocytes
Term
What is hypersecretion of GH in youth? As an adult?
Definition
Giantism. Acromegly.
Term
What is hyposecretion of GH in youth? As an adult?
Definition
Dwarfism. Simmonds Disease.
Term
How does GH mobilize energy?
Definition
Glucose from the liver abd fatty acids from Adipose cells.
Term
What is the middle portion of the thyroid gland called?
Definition
Isthmus
Term
What microscopic spherical sacs make up most of the thyroid gland?
Definition
Thyroid follicles
Term
What hormones are produced from a thyroid follicle?
Definition
T3 and T4
Term
What hormone is produces by parafollicular cells? What does this hormone promote?
Definition
Thyrocalcitonin. Tones down the calcium levels in the blood by decreasing osteoclast activity (resorption) and decreasing the reabsorption of calcium in the kidneys.
Term
Not enough thyroxine production in a child is called? In an adult?
Definition
Cretinism. Hypothyroidism.
Term
What are the two types of hyperthyroidism? What is the difference?
Definition
Non-graves and Graves disease. Non-graves contains TSH within hormaonal axis whereas Graves diseases contain TSI in its hormonal axis.
Term
What is within the thyroid follicle?
Definition
Colloid
Term
Which thyroxine has a greater affinity for a receptor?
Definition
T3
Term
What other things does T4/T3 effect?
Definition
Increases BMR, heat production, neural mentation, number of cardiac receptors to increase heart rate, normal action of GH/STH
Term
What is the medical term for the physical excessive growth of the thyroid? What can cause this?
Definition
Thyroid goiter. Both hyperthyroidism (too much T4 and T3) and Hypothyroidism (because the thyroid gets bigger to try and absorb more iodine)and cancer.
Term
How might you calculate BMR?
Definition
Measure how much Oxygen you use per minute at rest, by breathing into and out of instrument.
Term
What other characteristics might a patient with chronic hypothyroidism have?
Definition
Weight gain, lethargic, bags under eyes more excessive, slower heart rate, limited growth.
Term
What are the characteristics of a Non-Graves Hyperthyroidism patient?
Definition
Too much of a signal to the follicle. Weight loss, hot body temp, rapid heart rate (tachycardia). Lowered CO.
Term
What are the characteristics of a Graves disease patient? What other molecule is involved in this disorder?
Definition
Has TSI that acts as an agonsit to produce more T4 and T3. Weight loss, hot body temp, rapid heart rate (tachycardia). Lowered stroke volume, lowered CO. EPF-exophthalmos.
Term
How would you treat a patient with a goiter caused by hypothyroidism due to not enough iodine?
Definition
synthroid-synthetic thyroid hormone
Term
How can you treat hyperthyroidism?
Definition
I131-radioactive isotope with a halflife of 8 days. PTU which decreases the production of T4.
Term
What is the mechanism of action for PTU?
Definition
Inhibits peroxidase activity that add in the idodine resulting in decreased T4 production.
Term
When is thyrocalciton released?
Definition
When calcium levels in the blood are too high?
Term
What hormones increase the calcium levels in the blood?
Definition
1,25 D3, and Parathyroid hormone (PTH)
Term
What is the half life of 25-hydroxycholecalciferol?
Definition
Several weeks
Term
What is the half life of 1,25 D3?
Definition
Few hours
Term
What does 1,25 D3 synthesis require? Where does the final synthesis occur? When is it released?
Definition
Sunlight. Kidney. When calcium levels are too low.
Term
What is the major target for vitamin D3? What is its effect? What calcium transporter is produced to increase the uptake?
Definition
Small intestine. Facilitates intestinal absorption of minerals including calcium and phosphorus for bone growth. Calbindin.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What are the characteristics of osteomalacia?
Definition
Bone bends too easily and the ratio of ca2+ per matrix is below normal.
Term
What is osteoporosis? What is the effect of E2 on osteoclast activity?
Definition
Not enough bone tissue. It inhibits osteoclast activity.
Term
What hormones are produced by the Islets of Langerhans and by which cells?
Definition
Beta cells-insulin. Alpha cells- glucagon.
Term
What do the acini within the pancreas secrete? What type of gland is this?
Definition
HCO3-. Exocrine
Term
What effect does Glucagon have on the liver, adipose cells, and the muscle?
Definition
Turns on glycogenolysis, lipolysis, and gluconeogenesis.
Term
What is the affects of insulin on blood glucose levels?
Definition
Decreases them by promoting glycogenesis and accelerating facilitated diffusion of glucose into the cells, to speed the sythesis of fatty acids.
Term
Wht is the difference between a down-regulated and an up-regulated cell?
Definition
The insulin target cell that is up-regulated contains more receptors than a down-regulated cell.
Term
Down-regulated cells are _____ responsive to insulin. This can evolve into a disorder in which it _______ glucose entrance into a cell.
Definition
Less. Decreases
Term
What is the major problem with Diabetes Mellitus type 1? What is another name for this disorder?
Definition
Body does not contain enough insulin. IDDM-insulin dependent diabetes mellitus
Term
What are some characteristics of Type 1 diabetes?
Definition
weight loss, atherclerosis, loss of vision. Severe kidney problems.
Term
Why does diabetes arise in a Type 2 patient?
Definition
It isn't that the patient doesn't have enough insulin, early onset at least, it's that target cells become less sensitive to it due to down-regulation of insulin receptors.
Term
Which type of diabetes is more common? Which is usually accompanied by elevated glucagon secretion? An absolute deficiency of Insulin? Insulin deficiency that occurs later in life?
Definition
Type 2. Type 1. Type 1. Type 2.
Term
What is an incretin? Is more insulin secreted in response to oral glucose or intra-veneous glucose?
Definition
Hormones that work to increase insulin secretion. Oral Glucose.
Term
What are the two main incretin hormones? Where are these hormones secreted?
Definition
GIP and GLP-1. Endocrine cells in the epithelium of the small intestine.
Term
What is DPP-4? What medicine is a specific inhibitor for this and what would be the respone?
Definition
Protease that breaks down GIP and GLP-1. Januvia and it would raise incretin levels which would then carry more glucose to Beta cells increasing insulin production.
Term
What are the impaired ranges for Fasting plasma glucose levels and a 2 hr sample of OGTT?
Definition
110-126 and 140-200