Endocrine

Question 1

Endocrine glands

Answer 1

o	Hypothalmus 
o	Anterior and Poster lobes of pituitary 
o	Thyroid 
o	Parathyroid 
o	Adrenal Cortex
o	Adrenal Medulla
o	Gonads 
o	Placenta
o	Pancreas

Question 2

hormones

Answer 2

Secreted into the circulation in small amounts and delivered to target tissues, where they produce physiologic responses

Synthesized and secreted by endocrine cells usually found in endocrine glands

Question 3

Categories of hormones

Answer 3

peptides (amino acids)

Steroids ( cholesterol)

Amines ( Tyrosine)

Question 4

steroid hormones

Answer 4

• Cortisol
• Aldosterone
• Estradiol and estriol
• Progesterone
• Testosterone
• 1,25-dihydroxychoecalciferol

Question 5

amine hormones

Answer 5

Catecholamines (Epinephrine, NE, and dopamine) & Thyroid hormones

Question 6

Regulation of Hormone Secretion

Answer 6

neural mechanism
feedback mechanism
negative feedback
positive feedback

Question 7

Neural mechanism

Answer 7

Secretion of catecholamines

Preganglionic sympathetic nerves synapse on the adrenal medulla & cause secretion of catecholamines into circulation

Question 8

Feedback mechanisms

Answer 8

More common

Some element of the physiologic response to a hormone “feeds back” either directly or indirectly on the endocrine gland that secreted the hormone – changing its secretion rate

Question 9

Negative Feedback

Answer 9

Some feature of hormone action – directly or indirectly – inhibits further secretion of hormone

(self-inhibiting)

Question 10

Positive Feedback

Answer 10

Uncommon
Some feature of hormone action causes more secretion of the hormone

(self-augmenting)

Question 11

example of positive feedback

Answer 11

estrogen secreted from the ovaries acts on the anterior pituitary to cause secretion of FSH and LH — and these anterior pituitary hormones cause more estrogen secretion