ENDOCRINE PANCREAS

Multiple Choice

The islets of Langerhans represent the ______% tissue mass of the pancreas:

• 1-2%

• 3-5%

• 8-9%

• 11-12%

Multiple Choice

Which chromosome is involved in insuline synthesis?

• 11

• 3

• 9

• 7

Multiple Choice

This is the most important stimuly for insulin secretion:

• Increased glucose concentration

• Fasting

• Exercise

• Cortisol

Multiple Choice

This is the transporter presented in B cells for moving glucose inside of this cells:

• GLUT2

• GLUT3

• GLUT4

• GLUT5

Multiple Choice

Once the glucose is inside of the B cells, is oxidized and ATP is formed, ATP closes the channels of:

• Na

• K

• Ca

• Mg

Multiple Choice

The increase of this ion causes exocytosis of the insulin-containing secretory granules:

• K

• Na

• Ca

• Mg

Multiple Choice

Oral glucose is more stimulan for the secretion of insulin than IV glucose:

• True

• False

Multiple Choice

The following are actions of insulin, except:

• Increase glucose uptake by target cells

• Stimulates gluconeogenesis

• Inhibits the mobilization of fatty acids

• Increase amino acid uptake by cells

Multiple Choice

Which of the following is an action of insulin?

• Promotes K uptake by cells

• Reduces K uptake by cells

• Promotes Ca uptake by cells

• Reduces Ca uptake by cells

Multiple Choice

Which of the following statments is true in relation with glucagon?

• Insulin and glucagon have similar actions

• Fasting stimulates its secretion

• Somatostatin stimulates its secretion

• Increased fatty acids stimulate its secretion

Multiple Choice

Which cells of the islet of Langerhans are in charge of Somatostaine production?

• Alfa

• Beta

• Delta

• Epsilon

Multiple Choice

The principal action of Somatostatin is to stimulate insulin secretion:

• True

• False