Endocrine System

Question 1

Adrenalin (NOT A NEGATIVE FEEDBACK LOOP)

Answer 1

Adrenal gland

Adrenalin acts to increase heart rate so there is increased blood flow to the muscles. It also increases blood pressure and stimulates the release of glucose from glycogen. Increased oxygen and glucose allows for increased the rate of respiration to release energy for the muscles

Question 2

Thyroxine

Answer 2

Thyroid gland

Low levels of thyroxine cause TRH to be produced in the hypothalamus. This causes TSH to be released from the pituitary gland. TSH causes the thyroid gland to produce thyroxine. When thyroxine levels are normal, thyroxine inhibits the release of TRH and production of TSH

Question 3

Endocrine system

Answer 3

Made of glands that secrete hormones, which are passed into the bloodstream to spread around the body

Question 4

Endocrine differences to the nervous system

Answer 4

-hormones travel through the blood, not as electrical impulses
-slow, not fast

Question 5

Negative feedback

Answer 5

Restoration of systems to normal levels