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Year 2 (Insulin & Glucagon) Quiz on Islets of Langerhans & Glucagon, created by gina_evans0312 on 04/03/2014.

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Islets of Langerhans & Glucagon

Question 1 of 18

1

Each islet contains 3000-5000 cells

Select one of the following:

  • True
  • False

Explanation

Question 2 of 18

1

How are glucose levels monitored?

Select one of the following:

  • High blood flow around cells

  • Insulin receptors on Beta cell surface

  • Flow of glucose in interstitial fluid

Explanation

Question 3 of 18

1

What is the role of the delta cells?

Select one of the following:

  • Somatostatin production

  • Glycase production

  • Insulin production

Explanation

Question 4 of 18

1

The Islets of Langerhans are only stimulated by the SNS

Select one of the following:

  • True
  • False

Explanation

Question 5 of 18

1

What is the role of glucagon?

Select one of the following:

  • To signal 'hunger'

  • To signal 'satiation'

  • To signal high blood flow

Explanation

Question 6 of 18

1

First Pre-proglucagon is converted into Proglucagon

Select one of the following:

  • True
  • False

Explanation

Question 7 of 18

1

In the small intestine, what is made from Proglucagon?

Select one or more of the following:

  • Glp1 & 2

  • Major Preglucagon Fragment

  • Glucogen

  • Glycocentin

Explanation

Question 8 of 18

1

In the Alpha cells, what is made from Proglucagon?

Select one or more of the following:

  • GRPP

  • Glucagon

  • Major Proglucagon Fragment

  • Glycocentin

Explanation

Question 9 of 18

1

What controls glucagon secretion?

Select one or more of the following:

  • Nutrients

  • Gut peptides

  • Hormones

  • The nervous system

Explanation

Question 10 of 18

1

Glucose is a potent inhibitor of glucagon secretion

Select one of the following:

  • True
  • False

Explanation

Question 11 of 18

1

Amino acids and free fatty acids in the blood _ secretion

Select one of the following:

  • Stimulate

  • Inhibit

Explanation

Question 12 of 18

1

Why does glucagon have no effect on skeletal muscle?

Select one of the following:

  • So the muscles don't get depleted of glucose

  • So the muscles cannot take glucose from the blood

Explanation

Question 13 of 18

1

Glucagon stimulates insulin release

Select one of the following:

  • True
  • False

Explanation

Question 14 of 18

1

Which of the following is not a role of glucagon?

Select one of the following:

  • Mobilisation of liver glucose

  • Breakdown of TAGs to F.As

  • Inc protein synthesis

  • Inc cardiac contractility

Explanation

Question 15 of 18

1

Why does glucagon leads to the P of pyruvate kinase?

Select one of the following:

  • Reduce glycolysis & inc gluconeogenesis

  • Increase glycolysis & red gluconeogenesis

Explanation

Question 16 of 18

1

Stimulating pyruvate carboxylase stimulates glycolysis

Select one of the following:

  • True
  • False

Explanation

Question 17 of 18

1

Which of the following is deactivated in order to prevent lipogenesis

Select one of the following:

  • TAG lipase

  • Acetyl CoA carboxylase

  • Pyruvate Kinase

  • Phosphofructokinase

Explanation

Question 18 of 18

1

Phosphofructokinase 2 activates gluconeogenesis & inhibits glycolysis

Select one of the following:

  • True
  • False

Explanation

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