12.5 Hormonal Regulation of Metabolism

Question 1

How does Glucagon increase blood glucose lvls?

Answer 1

By promoting Gluconeogenesis and Glycogenolysis in the liver

Question 2

Which cells secrete Glucagon?

Answer 2

Pancreatic α-cells

Question 3

Which cells secrete Insulin?

Answer 3

Pancreatic β-cells

Question 4

What triggers Glucagon secretion?

Answer 4

Low glucose, high AA lvls

Question 5

What does cortisol do?

Answer 5

Its a Glucocorticoid

Elevates blood glucose lvls and increases access for nervous system tissue.

Increases activity glucagon, epinephrine, and catecholamines.

Question 6

What does a Glucocorticoid do?

Answer 6

Increases blood glucose lvls, in stress response, inhibiting glucose reuptake, enhance glucagon and catecholamine impact.

*Long term exposure promotes fat storage in adipose tissue.

Question 7

What is a Catecholamine?

Answer 7

Secreted from adrenal medulla.

Increase liver and muscle glycogen phosphorylase, promoting glycogenolysis.

Question 8

What do Thyroid Hormones do?

Answer 8

Modulate the impact of metabolic hormones and directly impact basal metabolic rate.

Question 9

What is Thyroxine (T4)?

Answer 9

Increases metabolic rate after several hours & lasts several days

Converted to T3 in tissue

Question 10

What is Triidothyronine (T3)?

Answer 10

Increases metabolic rate rapidly but lasts for short duration.