homeostasis - negative feeback

Question 1

where are the adrenal glands located

Answer 1

at the top of the kidneys

Question 2

what hormone do these glands produce and when

Answer 2

produces adrenaline in time of fear or stress

Question 3

what is one of the main effects of adrenaline

Answer 3

increase of heart rate

Question 4

what happens when the heart is beating faster

Answer 4

more oxygen and glucose is delivered by the blood to the Brian and muscles

Question 5

what does this prepare the body for

Answer 5

to either fight or run away - “fight or flight”

Question 6

where is the thyroid gland found

Answer 6

the base of the neck

Question 7

what hormone is released here

Answer 7

releases thyroxine

Question 8

what are the two main effects of thyroxine

Answer 8

• stimulates basic metabolic rate
• growth and development

Question 9

how is the amount of thyroxine in the blood controlled

Answer 9

negative feedback

Question 10

explain the negative feedback for thyroxine in the body

Answer 10

• the levels of thyroxine is measure by the brain, when these levels drop the pituitary gland releases TSH into the blood
• TSH then triggers the thyroid gland to produce more thyroxine
• the increase level of thyroxine is detected by the brain and so the pituitary gland stop releasing TSH
• as the TSH levels fall they thyroid gland releases less thyroxin