Exam 1 Flashcards
(41 cards)
Purposes of reproduction
Perpetuation of species
To provide food
Genetic improvement
Ductless glands, secrete directly into blood
Endocrine glands
Ducts, secrete externally
Exocrine glands
What glands secrete hormones and where do they go
Endocrine glands, carried by blood to specific target tissues where they evoke physiological adjustments
Properties of hormones
Effect specialized tissues containing receptors
Are not chemically unique
Have variable speeds of reaction
Active at very low concentrations
Hormones from anterior pituitary
LH, FSH, prolactin, and adrenocorticotropic hormone
FSH actions in females
Follicle growth
Estrogen production (in conjunction with LH)
Inhibin production
FSH actions in males
Spermiogenesis
Inhibin production
Androgen-binding protein
Action of LH in females
Maturation of follicle
Ovulation
CL formation
Progesterone production (luteotropic effect)
Action of LH in males
Testosterone production (from leydig cells )
What kind of hormone is prolactin
Lactotropin
Actions of prolactin
Milk synthesis
Development of mammary glands
Maternal behavior
What cells produce ACTH
Corticotrope
Action of ACTH
Release of glucocorticoids (cortisol) from adrenal glands
Hormones from ovary
Estrogens, progesterones, Inhibin, and relaxin
site of production and some actions of estrogen
theca and granulosa cells of follicle; uterine contractions, positive and negative feedback on gonadotropins, duct growth of mammary glands, secondary sex characteristics
site of production and action of progesterone
luteal cells of CL; maintains pregnancy
site of production for inhibin (folliculostatin) and actions
granulosa cells of follicle, found in follicular fluid; suppresses release of FSH
site of production for relaxin and actions
luteal cells of CL during pregnancy (also placenta and uterus); relaxes body during pregnancy
hormones from testis
androgens (testosterone), ABP, and inhbin
site of production and action of testosterone
Leydig cells of testis (stimulated by LH); spermatocytogenesis and male sexual behavior
site of production and action of inhibin
Sertoli cells of testis, suppressed FSH
site of production and action of ABP
sertoli cells; binds androgens to maintain high conc. for spermatogenesis
Hormones from placenta
estrogens, progestins, relaxin, human chorionic gonadotropin (hCG), pregnant mare serum gonadotropin (PMSG or eCG), placental lactogen, and interferon