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64 Cards in this Set
- Front
- Back
What does aspirin not affect? |
PT and aPTT |
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Endocrine system |
odd organ system None are usually connected secrete hormones to excite target cells |
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Pancreas |
made up of 2 types of secretory tissues, which reflect the dual function. Exocrine(digestive enzymes) and endocrine |
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Endocrine cell -another name -types of cells -amount |
pancreatic islets (Islets of Langerhans) Alpha cells produce glucagon (20%) Beta cells produce insulin (75%) |
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Discuss the pathway for insulin release |
90 BG > eat > increase BG > stimulate Beta cells > release insulin > insulin receptors in the liver where glucose is stored > BG decreases and insulin release does the same. |
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Discuss the pathway for glucagon release |
90 bg > decrease in BG > Alpha cells stimulated to release glucagon > breaks down glycogen through glycogenolysis > increase in BG |
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What lvls correlate directly with insulin lvls? |
Glucose lvls |
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What are the four types of diabetes? |
Type 1 - insulin dependent -generally autoimmune. 80-90% functioning beta cells are lost.-fatigue -develop diabetic ketoacidosis -polydipsia, polyphagia, polyuria, wt loss Type 2 - non-insulin dependent -metabolic syndrome, less insulin, increased resistance to insulin Type 3 - other causes of BG Type 4 - Gestational -7%, hormones block |
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Type 2 Diabetes |
Treat via diet and exercise and medication Clinical manifestations: recurrent infections, vision problems, neuropathy, dehydration(nonketotic hyperosmolar coma), nephropathy. |
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Polyol pathway |
type 2 diabetes where it hold onto sorbitol and fructose, which will increase intracellular osmotic pressure. |
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What is the microvascular disease caused by? |
Glycosilation |
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What are the ways to DX diabetes? |
Fasting Blood glucose -fasting, then given orange syrup(1 time) Glucose tolerance test -draw labs for a 3 hours period |
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How will you be able to monitor how well diabteics are sticking to the regimen? |
Glucose POC, self monitoring Hemogloblin A1C -shows long term |
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Diabetes Insipidus |
Nothing to do with Insulin insufficiency with ADH(polyuria, polydipsia) Neurogenic(not enough) and nephrogenic(not responding to) |
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How do beta cells make insulin? |
1st preproinsulin proinsulin insulin(activated in granules) |
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What is the C-peptide in insulin? |
No function connects alpha and beta (active forms of insulin) |
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What insulin can we use, if we don't like recombinent? |
Porcine only one amino acid off. |
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GLUT2 transporters |
Important in that it has a low affinity, so the glucose will not go into beta cells so readily, if that were to occur, then the beta cells would constantly be releasing insulin. |
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When GLUT2 allows glucose in the cell, what happens? |
Metabolism increases > ATP increases > K channel ATP sensitive close in excess amounts of ATP > current increases to depolarization > Ca++ opens up and exocytosis of insulin occurs. |
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What is the insulin receptor? |
It is a tyrosine kinase receptor dimer that sets off a phosphorylation cascade. for membrane translocation of GLUT, increase glycogen formation, and activation of transcription factors |
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GLUT 1, 3, 4, 5 |
membrane translocation of GLUT |
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GLUT1 |
Brain and RBC |
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GLUT 4 |
only one with intermediate affinity of glucose =5 Muscle and adipose |
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GLUT 1 3 5 are |
high affinity transporters |
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What are the 4 main effects of insulin? |
-Increase glucose absorption into all the cells of the body -Promote glucose stores as glycogen -Inhibits glycogenolysis -Inhibits conversation of fatty acids and amino acids to ketones |
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Rapid Acting Insulin |
lispro, aspart, glulisine |
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Short Acting Insulin(Regular) |
Novolin, humulin |
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Intermeadiate Acting Insulin |
Neutral Protamine Hagedorn, isophan |
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Long Acting Insulin |
Glargine, detemir
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Insulin dosing |
some people want the low basal rate and give short acting for meals, others want less injections, so they take the 70/30. |
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Insulin delivery |
SQ injections Portable pens Conintuous SQ insulin infusion -sterile change Q 2-3 days -Best for tight insulin control Inject where fat is! |
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Intensive Insulin regimen |
IIDM: tight control Need basal and bolus -sliding scale(illness increases the dose)` |
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What is the complication of treatment for those with Diabetes? |
Hypoglycemia anxiety, blurred vision, palpitations, shakiness, slurred speech, sweating Treat: give sugar or glucagon |
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Biguanines |
Metformin 1st line therapy(with meals) Reduces hepatic production of glucose |
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Insulin Secretagogues |
Stimulate the release of insulin by binding to K+ ATP sensitive channels. Oldest class - sulfonylureas (Increased cardio mortality rate) Meglitinides(shorter duration of action) |
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Thiazolidinediones |
Decreases insulin resistance and increases insulin signal transduction. Increase risk for MI Had an access program, but you had to know it increases risk for MI |
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Alpha-Glucosidase Inhibitors |
Block digestion of complex carbohydrates good for pre-diabtics GI effects: flatulence, diarhhea, and ABD pain |
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Bile Acid Binding resins |
Large cation exchange resins-not absorbed that bind to cholesterol and surround it. Bind bile acids-prevent reabsorption GI upset |
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Hyperglucagonemia |
Excess glucagon because of pts taking insulin or meds that increase insulin. |
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Symlin (Amylin) |
Released by beta cells to suppress glucagon release. Need to use with insulin Decreases circulating glucose |
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GLP-1 |
Increases insulin, decreases glucagon GI hormone pancreatic cancer risk |
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Januvia |
DDP-4 antagonist found in gila monster saliva Incretine therapy Gi hormone |
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Gliflozins |
SGLT2 inhibitor SGLT2 (Proximal convoluted tubule: filter out 180 G, and 90% reabsorbed in distal segment) More glucose goes out into the urine. Osmotic diuretic. Wt loss, dehydration, increase in urethral infections |
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What the combination therapy steps? |
1. Biguanide 2. Biguanide + insulin OR Secretagogue 3. Biguanide + 2-3 other classes 4. Intensive Insulin Therapy |
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What is the first measure of taking care of Diabetics? |
Eat right and exercise and check your feet and eyes |
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Sterols |
Precursors to cholesterol can be found in animals and plants Need for many functions in the body. |
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cholesterol |
we eat and make it through the mevalonate pathway. |
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cholesterol synthesis |
acetyl-CoA > Mevalonate > squalene > cyclation of squalene > cholesterol |
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Atherosclerosis |
leading cause of death in U.S. Lipid deposits in CA |
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HDL |
Good cholesterol. scavenger lipoprotein and takes lipids from different areas. Want it to be Higher |
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LDL |
Bad cholesterol, deposits lipids into the arteries. Higher lipid to protein. Transfer lipids to the cells. Excess amounts causes it to be deposited into the arteries. Want it to be lower |
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Reminant Lipid Particles |
breakdown of HDL and LDL |
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Chylomicrons |
Formed in the intestine, then goes to helptic portal system and goes to the liver Carry triglycerides and cholesterol |
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VLDL |
Secreted by the liver, go to peripheral tissues and converted to IDL and LDL |
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How does plaque formation occur? |
The LDL are swallowed up by macrophages > become foam cells > proinflammatory > Increased cytokines > increased cells and edema > release reactive oxygen species > oxidize the LDL > more inflammation > macrophages breakdown and become calcified |
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If we take the total cholesterol and divide by the HDL, what should it look like? |
The number should be low. |
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What the first thing we can do about dyslipidemia? |
Control diet and exercise. <20% fat for total calorie intake wt reduction omega-3 fatty acids |
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How much should fat be a part of your diet? |
<20% |
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Where does the majority of the dyslipidemia medications work? |
In the hepatocyte. |
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Statins |
LDL(-40%), prescribed in Coranary symptoms regardless of lipidemia. Look like HMG-CoA. HDL(+10%). Modest decrease in triglycerides. A: 40-70% oral bioavailablity -extensive 1st pass, but that where it works E: Heptic metabolism and kidney |
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Niacin |
Decreases VLDL secretion from liver and LDL(-20%). HDL(+25%). Drop triglycerides. 2-6mg daily cutaneous vasodilation, pruitis, dry skin, rash, ADB discomfort, elevation of liver enzymes |
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Fibrates |
PPAR mediated lipolysis, decrease VLDL, LDL(-10%), HDL(+15%), drop triglycerides Rare GI upset |
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Bile acid binding resins |
LDL(-20%), HDL(+5%) & BG. May increase VLDL. 5-30 g/day mixed with liquid and must be with meals Constipation, bloating, steatorrhea, oral drug absorption impairmentcompletely surround the fatty acids in gut. Not great for pts with malabsorption issues. |
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Ezetmibe (Zetia) |
Blocks NPC1L1, inhibits cholesterol absorption LDL(-20%), HDL(+5%) A:Readily absorbed, increased with fibrates, decreased with resins. D: Peak blood lvls 12-14 hrs T1/2: 22 hrs E: 80% in feces |