Endocrine System

Question 1

define hormone

Answer 1

A substance, usually a peptide or steroid, produced by one tissue and conveyed by the bloodstream to another to effect physiological activity, such as growth or metabolism

Question 2

how is a hormone introduced into the system?

Answer 2

Released by the glands:
Individual ductless gland
These ductless glands are rich in capillaries
Form and secrete hormones. These hormones have specific target organs

Question 3

what does the pineal gland do?

Answer 3

regulates circadian rhythm

Releases melatonin.

Question 4

where is the pineal gland located?

Answer 4

Posterior part of the epithalamus

Question 5

what is needed to form T3?

Answer 5

iodine component, need iodine to form T3, low iodine goiter will develop

Question 6

what does the T4 component of the thyroid control?

Answer 6

controls the metabolic rate of all tissues.

Question 7

what does the parathyroid do?

Answer 7

(PTH) Maintains Calcium levels within the system (especially within the bone), Phosporus, Vitamin D level
Breakdown calcium from bones if there is a needed

Question 8

what does the adrenal gland do?>

Answer 8

Epinephrine (sympathetic), norepinephrine (vasoconstrictor),
when you are stressed in releases cortisol & hydrocortisol(released during stress)

Question 9

what is the pituatary gland considered?

Answer 9

MASTER GLAND - tells the other glands when and how to release their hormones

Question 10

what two things does the thyroid release?

Answer 10

T3 and T4