Islets of Langerhans & Glucagon

Descripción

(Insulin & Glucagon) Year 2 Test sobre Islets of Langerhans & Glucagon, creado por gina_evans0312 el 04/03/2014.
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Test por gina_evans0312, actualizado hace más de 1 año
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Creado por gina_evans0312 hace alrededor de 10 años
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Resumen del Recurso

Pregunta 1

Pregunta
Each islet contains 3000-5000 cells
Respuesta
  • True
  • False

Pregunta 2

Pregunta
How are glucose levels monitored?
Respuesta
  • High blood flow around cells
  • Insulin receptors on Beta cell surface
  • Flow of glucose in interstitial fluid

Pregunta 3

Pregunta
What is the role of the delta cells?
Respuesta
  • Somatostatin production
  • Glycase production
  • Insulin production

Pregunta 4

Pregunta
The Islets of Langerhans are only stimulated by the SNS
Respuesta
  • True
  • False

Pregunta 5

Pregunta
What is the role of glucagon?
Respuesta
  • To signal 'hunger'
  • To signal 'satiation'
  • To signal high blood flow

Pregunta 6

Pregunta
First Pre-proglucagon is converted into Proglucagon
Respuesta
  • True
  • False

Pregunta 7

Pregunta
In the small intestine, what is made from Proglucagon?
Respuesta
  • Glp1 & 2
  • Major Preglucagon Fragment
  • Glucogen
  • Glycocentin

Pregunta 8

Pregunta
In the Alpha cells, what is made from Proglucagon?
Respuesta
  • GRPP
  • Glucagon
  • Major Proglucagon Fragment
  • Glycocentin

Pregunta 9

Pregunta
What controls glucagon secretion?
Respuesta
  • Nutrients
  • Gut peptides
  • Hormones
  • The nervous system

Pregunta 10

Pregunta
Glucose is a potent inhibitor of glucagon secretion
Respuesta
  • True
  • False

Pregunta 11

Pregunta
Amino acids and free fatty acids in the blood _ secretion
Respuesta
  • Stimulate
  • Inhibit

Pregunta 12

Pregunta
Why does glucagon have no effect on skeletal muscle?
Respuesta
  • So the muscles don't get depleted of glucose
  • So the muscles cannot take glucose from the blood

Pregunta 13

Pregunta
Glucagon stimulates insulin release
Respuesta
  • True
  • False

Pregunta 14

Pregunta
Which of the following is not a role of glucagon?
Respuesta
  • Mobilisation of liver glucose
  • Breakdown of TAGs to F.As
  • Inc protein synthesis
  • Inc cardiac contractility

Pregunta 15

Pregunta
Why does glucagon leads to the P of pyruvate kinase?
Respuesta
  • Reduce glycolysis & inc gluconeogenesis
  • Increase glycolysis & red gluconeogenesis

Pregunta 16

Pregunta
Stimulating pyruvate carboxylase stimulates glycolysis
Respuesta
  • True
  • False

Pregunta 17

Pregunta
Which of the following is deactivated in order to prevent lipogenesis
Respuesta
  • TAG lipase
  • Acetyl CoA carboxylase
  • Pyruvate Kinase
  • Phosphofructokinase

Pregunta 18

Pregunta
Phosphofructokinase 2 activates gluconeogenesis & inhibits glycolysis
Respuesta
  • True
  • False
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