Regulating Metabolism

Question 1

T________ increases metabolism, TSH stimulates its secretion. What stimulates the secretion of TSH and what reduces it?

Answer 1

Thyroxine
TSH
TSH releasing factor
TSH inhibiting factor

Question 2

What are the stimuli of high metabolism?

Answer 2

High metabolism = high temperature

High levels of thyroxine

Question 3

What receptors detect high metabolism?

Answer 3

Thermoreceptors - skin
Hypothalamus - blood
Chemoreceptors - aortic and carotid bodies

Question 4

What modulates high metabolism and how?

Answer 4

Hypothalamus - TSH inhibiting factor

Pituitary anterior - decreases TSH secretions

Question 5

Effectors of high metabolism?

Answer 5

Thyroid gland

Question 6

Response to less TSH?

Answer 6

Reduced production of thyroxine

Question 7

Feedback from decreased levels of thyroxine?

Answer 7

Negative
Lower thyroxine levels
Decreased metabolism = decreased temp.

Question 8

Whats the stimuli of low metabolism?

Answer 8

Low metabolism = low temp.

Low thyroxine levels

Question 9

What receptors detect low metabolism?

Answer 9

Thermoreceptors - skin
Hypothalamus - blood
Chemoreceptors - aortic and carotid bodies

Question 10

What modulates low metabolism and how?

Answer 10

Hypothalamus - TSH releasing factor

Pituitary anterior - secretes more TSH

Question 11

Effector of thyroxine?

Answer 11

Thyroid glands

Question 12

Response to increased TSH?

Answer 12

Higher thyroxine levels

Increased metabolism = increased temp.

Question 13

Feedback from increased levels of thyroxine?

Answer 13

Negative
High thyroxine levels
Higher metabolism = high temp.

Question 14

What is hyperthyroidism? How is it caused? What is another name for this?

Answer 14

Overproduction of thyroxine
Immune response causes enlargement/overstimulation of thyroid
Grave’s Disease

Question 15

How does a doctor know someone has HYPERthyroidism?

Answer 15

They have high levels of TSH inhibiting factor in the blood and yet still have a high metabolism

Question 17

Stimulus for HYPERthyroidism?

Answer 17

High levels of thyroxine

Question 18

Receptors for HYPERthyroidism?

Answer 18

Chemoreceptors in hypothalamus

Question 19

What modulates HYPERthyroidism and how?

Answer 19

Hypothalamus - TSH inhibiting factor

Pituitary anterior - secretes less TSH

Question 20

Effector of HYPERthyroidism, and issue?

Answer 20

Thyroid - enlarged gland

Question 21

Response of effector, with HYPERthyroidism?

Answer 21

Continual production of thyroxine

Question 22

Feedback of HYPERthyroidism?

Answer 22

Positive

Thyroxine levels still high

Question 23

How does a doctor know someone HYPOthyroidsim?

Answer 23

High levels of TSH in the blood and yet still a low metabolism

Question 24

What is HYPOthyroidism? How is it caused? What is another name for it?

Answer 24

Underproduction of thyroxine
Due to lack of iodine in the diet (iodine helps to produce thyroxine)
Hashimoto’s disease

Question 25

Which receptors detect HYPOthyroidism?

Answer 25

Chemoreceptors in the hypothalamus

Question 26

What modulates HYPOthyroidism and how?

Answer 26

Hypothalamus - TSH releasing factor

Pituitary anterior - secretes more TSH

Question 27

Effector of HYPOthyroidism, and the issue?

Answer 27

Thyroid - low iodine

Question 28

Response from effector, with HYPOthyroidism?

Answer 28

Thyroxine cant be produced

Question 29

Feedback of HYPOthyroidism?

Answer 29

Positive

Thyroxine levels still low

Question 31

Stimulus of HYPOthyroidism?

Answer 31

Low levels of thyroxine