Flashcards in Hormones table Deck (75)
What does the Hypothalamus secrete?
- Releasing hormones: TRH, GnRH, CRH, GHRH,
- Inhibiting hormones: Somatostatin, PIH (Prolactin inhibitory hormone...also called dopamine.
What is the chemical nature of all things released by the hypothalamus?
All peptides except for PIH (amine)
Major stimuli for secretion
What is released by the posterior pituitary gland?
Oxytocin and Vasopressin
Function of oxytocin
Let down breast milk by increasing the contractility of the myoepithelial cells, Uterine smooth muscle contraction
Function of vasopressin
Decrease water excretion, (aquaporins)
Increase contractility of smooth muscle which increases blood pressure
Major stimuli for vasopressin release?
Low plasma volume or high plasma osmlarity
What are the major hormones released by the Anterior Pituitary gland
Thyroid Stimulating Hormone
Follicle Stimulating hormone
Growth hormone is responsible for what?
- Growth, organic metabolism; secretion of somatomedin by liver and cartilage
Thyroid Stimulating Hormone does what?
Stimulates synthesis and secretion of thyroid hormones. Increases size of the thyroid gland.
Adrenocorticotrophic hormone does what?
Adrenal cortex (mainly increases in cortisol. Some increase in androgens and aldosterone)
Increases milk synthesis in the breasts, also stimulates breast development and inhibits ovulation
Leutenizing hormone does what
Stimulates testosterone synthesis on Leydig cells of the testes.
Stimulates ovulation, formation of the corpus luteum, estrogen and progesterone synthesis in ovaries
Follicle stimulating Hormone does qhat
Sperm maturation in the testis, follicular development and estrogen in the ovaries.
Which cell types in the anterior pituitary are classified as basophils
Everything except GH and PRL
GH and PRL are
What hormones are released by the adrenal cortex?
Adrenal Androgens (DHEA and adrostenedione)
All of the hormones released by the adrenal cortex are of what chemical nature?
Cortisol does what?
Stimulates gluconeogenesis; inhibits inflammatory response, suppresses immune response, enhances vascular response to catecholamines
Aldosterone does what
increases Na reabsorption in the kidneys, increases K secretion, inc H secretion
Adrenal androgens do what?
stimulate spermatogenesis and male secondary sex characteristics.
Just gonna do some actions for a while
What hormones does the Endocrine Pancreas secrete?
What is the main function of insulin?
insulin decreases blood glucose
glucagon increases blood glucose
What hormones are secreted by the placenta?
- Human Chorionic Gonadotropin (hCG)
- Human Placental Lactogen (HPL) or human chorionic sommatotropin
What does HCG do?
Stimulates Estrogen and Progesteronesynthesis in the corpus luteum of early pregnancy
What does HPL do?
Growth like and Prolactin like actions during pregnancy
What does Estradiol do?
stimulates growth and development of female repro system, follicular phase of menstrual cycle, development of breasts, prolactin; maintians pregnancy
What does Prgesterone do?
Stimulates the Luteal phase of the Menstrual cycle