Pancreas physiology and diabetes mellitus
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Questions and Answers

In the fasting state glucose is ____ mg/dL and fatty acids are ____ µM. In the fed state glucose is ____ mg/dL and fatty acids are ____ µM.

<100, 400, 120-140, <400

Pancreatic islet cells comprise ____% of pancreatic physiology

1-2

Alpha cells make up ____% of total islet cells and secrete ____ in response to ____.

15-20, glucagon, hypoglycemia

Beta cells make up ____% of total islet cells and secrete ____.

<p>60-85, insulin</p> Signup and view all the answers

Delta cells make up ____% of total islet cells and secrete ____.

<p>3-10, somatostatin</p> Signup and view all the answers

____ can be used to determine if a patient is synthesizing endogenous insulin or if the source is exogenous

<p>C peptide</p> Signup and view all the answers

The insulin receptor is a ____ composed of alpha/beta subunit dimers

<p>receptor tyrosine kinase</p> Signup and view all the answers

Erythrocytes have ~____ insulin receptors per cell while adipocytes and hepatocytes have ~____ insulin receptors per cell

<p>40, 300,000</p> Signup and view all the answers

The ____ subunits inhibit the inherent tyrosine phosphorylation of the ____ subunits of the insulin receptors

<p>alpha, beta</p> Signup and view all the answers

Insulin receptor activation stimulates cell growth, protein synthesis, glycogen synthesis and translocation of ____ enriched vesicles to the cell membrane

<p>GLUT4</p> Signup and view all the answers

Under low glucose conditions, the ____ pumps pancreatic alpha-cells are not as active, SOC are activated to increase intracellular Ca2+ that depolarizes the cell to release glucagon

<p>SERCA</p> Signup and view all the answers

____ and ____ are GI hormones released after meals and stimulate insulin secretion

<p>Glucagon like peptide-1 (GLP-1), gastric inhibitory peptide (GIP)</p> Signup and view all the answers

With T1DM, ____ cell destruction leads to loss of ____ production, further leading to increased HbA1C (glycated Hb), polyphagia, polydipsia, polyuria

<p>beta, insulin</p> Signup and view all the answers

In T2DM, insulin may be present but it is not released properly or does not act appropriately, with relative insulin ____

<p>resistance</p> Signup and view all the answers

Other than the traditional type 1 and type 2 of DM, diabetes can be caused by carbohydrate intolerance associated with genetic syndromes e.g. ____

<p>MODY</p> Signup and view all the answers

Hyperlipidemia can occur with DM due to unopposed action of ____ in adipose tissue

<p>hormone sensitive lipase</p> Signup and view all the answers

Diagnostic criteria of diabetes includes any of the following: -Symptoms of diabetes plus a casual plasma glucose concentration ≥ ____ mg/l (11.1 mM) -fasting BP ≥ ____mg/dl (7.0 mM) -2hPG ≥ ____ mg/dl during an OGTT HbA1c ≥ ____%

<p>-200 -126 -200 -6.5%</p> Signup and view all the answers

Patients with T1DM have antibodies against ____ and to ____.

<p>pancreatic beta-cells, glutamic acid decarboxylase</p> Signup and view all the answers

The major susceptibility gene for T1DM is located in the ____ on chromosome 6, with polymorphisms accounting for ____% of the genetic risk of developing type 1

<p>HLA complex, 40-50</p> Signup and view all the answers

The HLA complex contains genes that encode the ____, which present antigen to helper T cells and thus are involved in initiating the immune response

<p>class II MHC molecules</p> Signup and view all the answers

T2DM has a strong genetic component with over ____ genetic loci identified

<p>80</p> Signup and view all the answers

T2DM is characterized by insulin resistance in which ____, ____, and ____ are refractory to the action of insulin to maintain glucose levels within the normal range

<p>liver, skeletal muscle, adipose tissues</p> Signup and view all the answers

Thiazolidinediones act on the peroxisome proliferator-activated receptors (PPARs), particularly PPAR-gamma, which is involved in lipid metabolism and glucose ______

<p>uptake</p> Signup and view all the answers

____ slow the inactivation of incretin hormones, such as GLP-1 and GIP, which stimulate insulin secretion and inhibit glucagon secretion

<p>DPP-4 inhibitors</p> Signup and view all the answers

____ decrease the reabsorption of glucose in the proximal tubules of the kidneys, leading to increased urinary glucose excretion.

<p>SGLT-2 inhibitors</p> Signup and view all the answers

Thiazolidinediones have been associated with an increased risk of cardiovascular events and heart ______

<p>failure</p> Signup and view all the answers

SGLT-2 inhibitors have been associated with an increased risk of urinary tract infections and diabetic ______

<p>ketoacidosis</p> Signup and view all the answers

Biguanides improve insulin sensitivity, reduce hepatic glucose production, and increase insulin secretion. The primary example of biguanides is ________.

<p>metformin</p> Signup and view all the answers

_____ stimulate insulin release from the pancreas.

<p>Sulfonylureas</p> Signup and view all the answers

Adverse effects of metformin include nausea, vomiting, and ________, which typically resolve within a few weeks.

<p>diarrhea</p> Signup and view all the answers

Common side effects of sulfonylureas include hypoglycemia, weight gain, and ________.

<p>hypoglycemic unawareness</p> Signup and view all the answers

Oral ____ agents are medications used to manage blood sugar levels in people with T2DM.

<p>hypoglycemic</p> Signup and view all the answers

Parenteral ______ are typically administered using an injection pen, which allows for easy and convenient self-injection. These pens come in a variety of sizes and colors, and many have features like a visual guide to ensure proper injection depth and a built-in needle guard.

<p>hypoglycemics</p> Signup and view all the answers

Amylin ______, such as pramlintide, are injectable medications that help improve glycemic control in individuals with type 2 diabetes. These medications work by mimicking the action of amylin, a hormone that helps regulate blood sugar levels after meals. Pramlintide is typically injected before meals and has been shown to reduce post-meal blood sugar levels and improve glycemic control.

<p>analogs</p> Signup and view all the answers

Some forms of neonatal diabetes are caused by mutations in ____ channel on beta-cells or mutations in the insulin gene

<p>inward rectifying K+</p> Signup and view all the answers

Most patients with MODY are treated with ____.

<p>Sulfonylureas</p> Signup and view all the answers

Chronic diseases of the pancreas (pancreatitis), _____, or endocrinopathies (acromegaly and Cushings disease) can cause diabetes

<p>cystic fibrosis</p> Signup and view all the answers

gestational DM affects between ____% of all pregnancies

<p>2-10</p> Signup and view all the answers

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