DSA 1 for Lopez Flashcards Preview

COM Anatomy, Biochemistry, OS > DSA 1 for Lopez > Flashcards

Flashcards in DSA 1 for Lopez Deck (8):
1

3 classes of hormones

amino acids and peptides, steroids, and amines

2

peptide hormone synthesis

begins as preprohormone mRNA, and then translated by ribosomes at the ER; translocated into ER and the signal peptide is cleaved to produce a prohormone. further cleavage is done in the Golgi apparatus to produce the final peptide form. it is then stored in vesicles in the cytoplasm.

3

amine hormones

epinephrine, norepinephrine- made from tyrosine in the adrenal medulla

4

steroid hormones

cortisol, aldosterone, testosterone, progesterone, estradiol, and vitamine D

most are made in the adrenals, gonads, placenta, corpus luteum

5

Loop Long feedback

hormones "feedback" all the way to the hypothalamic-pituitary axis

6

Short loop feedback

means hormones from anterior pituitary feedback on hypothalamus

7

ultrashort feedback

hypothalamic hormones feedback to inhibit themselves

8

the primary example of positive feedback in the endocrine system

the secondary example given in the text

primary: estrogen's PFB on FSH/LH secretion

secondary is oxytocin: dilation of the cervix causes PP to secrete oxytocin. in turn, this causes uterine contractions, which further stimulates oxytocin release