Physiology of the pancreas and related disorders (mainly diabetes)
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Which hormone actively decreases the blood glucose concentration?
This hormone is produced by the islets of Langerhans in the pancreas.
What are the four well-defined class-1 glucose transporters?
These transporters are found in various tissues and have different functions.
Which glucose transporter is influenced by insulin?
This transporter is expressed in skeletal and cardiac muscle cells and adipose tissue.
Which cells are associated with the hormones glucagon, insulin, somatostatin, and pancreatic polypeptide in the islets of Langerhans?
These cells can be differentiated using immunostaining in the islets of Langerhans.
What is the process called when glycogen is metabolized back to glucose?
This process takes place mainly in the liver and provides glucose to be released into circulation.
Which hormone stimulates the relaxation of the sphincter of Oddi, allowing the flow of digestive juices into the duodenum?
This hormone is released in response to the presence of fat and protein in the stomach.
What percentage of cells in the islets of Langerhans are β-cells?
These cells primarily produce insulin and are predominantly found in the core of the islets.
What is the main function of glucose transporter GLUT1?
This transporter is found in all plasma cell membranes to some extent and is particularly important for glucose transport in erythrocytes and endothelial cells.
Which organ provides the blood supply to both the body and the tail of the pancreas?
This artery is a branch of the celiac trunk and supplies blood to the spleen, stomach, and pancreas.
Which type of cell membrane transport mechanism is used by glucose transporters to move glucose across cell membranes?
This transport mechanism depends on the presence of a concentration gradient and does not require energy in the form of ATP directly.
What is the primary stimulus for the synthesis and secretion of insulin?
Which enzyme is responsible for the production of glucose-6-phosphate and functions as a glucose 'sensor'?
Which GLUT transporter is insulin-dependent and responsible for glucose transport into skeletal and cardiac muscle and adipose tissue?
What effect does insulin have on glycogenolysis?
How does insulin affect gluconeogenesis?
Which part of the insulin receptor belongs to the receptor tyrosine kinase family?
What is the initial product of glucose entering the β-cells of the islets of Langerhans?
How does insulin affect glycogenesis?
What is the role of insulin receptor substrates (IRS) in insulin signaling?
Which of the following is NOT an effect of insulin on blood glucose?
In which cellular organelle is the insulin precursor molecule cleaved to form the insulin molecule and the C-peptide?
Which enzyme is involved in stimulating the production of glucose-6-phosphate in β-cells and is believed to function as a glucose sensor?
How is insulin release regulated in response to a maintained stimulus in β-cells?
What type of glucose transporter is primarily responsible for glucose entry into skeletal and cardiac muscle fibers and adipocytes in response to insulin?
Which process is inhibited by insulin in the liver to maintain blood glucose levels?
Which hormone is described as an anabolic hormone due to its role in promoting protein synthesis?
Which metabolic process is stimulated by insulin in adipose tissue to store glucose?
Which process does insulin inhibit in order to decrease the formation of ketone bodies?
Which gastrointestinal hormones are known to stimulate insulin production and β-cell mass?
What is the principal stimulus for insulin release?
Which amino acid transporter, stimulated by insulin, is responsible for the transport of arginine?
What is the role of insulin in maintaining intracellular potassium concentration?
In the glucose tolerance test, what is the expected response to a standard quantity of glucose taken orally?
Which amino acids directly stimulate insulin release?
Which part of the brain is associated with the regulation of eating and satiety and contains insulin receptors?
What is the effect of sympathetic stimulation on insulin secretion?
What is the effect of glucagon on insulin release?
What is the primary target tissue for glucagon action?
Which hormone, produced by insulin-sensitive adipocytes, stimulates the release of GLP1 from pancreatic α-cells and intestinal L-cells?
What is the role of somatostatin in the pancreatic islets?
What stimulates the release of glucagon from α-cells in the islets of Langerhans?
What is the effect of somatostatin on insulin and glucagon release from the pancreatic islets?
Which hormone, synthesized by the γ-cells, is a member of a family of hormones that includes neuropeptide Y and polypeptide YY?
Which of the following is a primary action of glucagon?
What is the primary function of the autonomic nervous system in the context of metabolism regulation?
What is the effect of interleukin-6 (IL6) on GLP1 production and insulin release?
Which of the following statements about the δ-cells in the islets of Langerhans is correct?
What is the main target tissue of glucagon and its primary function in that tissue?
What is the primary cause of Type 1 diabetes mellitus?
Which of the following symptoms is NOT associated with Type 1 diabetes mellitus?
What is the main cause of Type 2 diabetes mellitus?
What is the most common presenting symptom of diabetes mellitus?
What is the primary treatment for diabetic ketoacidosis (DKA)?
What is the primary treatment for type 1 diabetes?
Treatment for type 1 diabetes involves injecting a hormone.
What is the initial approach to treating type 2 diabetes?
Treatment for type 2 diabetes starts with lifestyle changes.
What happens when blood glucose falls between 2 and 4 mM in diabetic patients?
Low blood glucose levels can cause symptoms related to the nervous system.
Which long-term complication of diabetes affects the kidneys, retina, and nerves?
This long-term complication involves small blood vessels.
What is the purpose of regular retinal screening in diabetic patients?
This screening is related to the eyes and aims to detect a specific complication.
What are the two main hormones produced by the pancreas?
These hormones play a significant role in regulating blood glucose levels.
Which cells in the pancreas produce insulin?
These cells are found in the islets of Langerhans.
Which hormone released by the pancreas raises blood glucose levels?
This hormone is the counterpart to insulin.
What is the primary function of insulin?
This hormone helps lower blood glucose levels.
Which cells in the pancreas produce glucagon?
These cells are also found in the islets of Langerhans.
What is the primary target organ of insulin and glucagon?
This organ plays a crucial role in glucose metabolism.
Which hormone inhibits the release of insulin and glucagon in the pancreas?
This hormone is also produced in the pancreas, specifically by delta cells.
What is the primary function of glucagon?
This hormone works in opposition to insulin.
Which type of diabetes is characterized by the pancreas not producing enough insulin?
This type of diabetes is often diagnosed in children and young adults.
In type 2 diabetes, what is the primary issue related to insulin?
This type of diabetes is often associated with obesity and a sedentary lifestyle.
Which part of the pancreas is responsible for the production of digestive enzymes?
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