final a&p 2 Flashcards
Endocrine system
Glands, tissues, and cells that secrete hormones
Hormones
Chem messengers transported through bloodstream
What is pituitary gland controlled by
Hypothalamus
4 principal mechanisms of communication btwn cells
Gap junctions
neurotransmitters
Paracrines
Hormones
Exocrine glands
Have ducts, carry secretion to epithelial surface or mucosa of digestive tract
Extracellular effects (food digestion)
Endocrine system
No ducts, capillary network takes hormones into blood
Nervous/Endocrine - communication
Nervous - electrical impulses and neurotransmitters
Endocrine - hormones
Nervous/Endochrine - releases
Nervous - neurotransmitters at synapses at specific target cells
Endocrine - hormones into bloodstream for general distribution
Nervous/Endocrine - effects
Nervous - relatively local, specific effects
Endocrine - very general, widespread effects
Nervous/Endocrine reaction time
Nervous - quick, within 1-10 ms
Endocrine - slow, seconds to days
Nervous/Endocrine - stopping
Nervous - stops when stim stops
Endocrine - may continue to respond after stim stops
Nervous/Endocrine adaptation
Nervous - relatively quick to continual stim
Endocrine - relatively slowly, days to weeks
What is the adenohypophysis
Anterior pituitary
What is the neurohypophsis
Posterior pituitary
hypothalamic hormones
GnRH
TRH
CRH
PIH
GHRH
Somatostatin
Anterior lobe hormones
FSH
LH
TSH
ACTH
Prolactin
GH
posterior pituitary hormones
oxytocin
ADH
What is the full name, source, and target of ACTH
Adrenocorticotropic hormone
anterior pituitary
adrenal glands
What is the full name, source, and target of ADH
Antidiuretic hormone
posterior pituitary
kidneys
What is the full name and source of ANP
Atrial natriuretic peptide
heart
What is the full name, source, and target of CRH
Corticotropin-releasing hormone
hypothalamus
anterior pituitary
What is the full name and source of DHEA
Dehydroepiandrosterone
adrenal cortex
What is the full name and source of EPO
Erythropoietin
kidney, liver
What is the full name, source, and target of FSH
Follicle-stimulating hormone
anterior pituitary
ovaries, testes
What is the full name and source of GH
Growth hormone
anterior pituitary
What is the full name, source, and target of GHRH
Growth hormone-releasing hormone
hypothalamus
anterior pituitary
What is the full name, source, and target of GnRH
Gonadotropin-releasing hormone
hypothalamus
anterior pituitary
What is the full name and source of IGFs
Insulin-like growth factors
liver, other tissues
What is the full name, source, and target of LH
Luteinizing hormone
anterior pituitary
ovaries, testes
What is the full name and source of NE
Norepinephrine
adrenal medulla
What is the full name and source of OT
Oxytocin
posterior pituitary
What is the full name, source, and target of PIH
prolactin-inhibiting hormone (dopamine)
hypothalamus
anterior pituitary
What is the full name, source, and target of PRL
prolactin
anterior pituitary
mammary glands
What is the full name and source of PTH
Parathyroid hormone
parathyroids
What is the full name and source of TH
thyroid hormone
thyroid
What is the full name, source, and target of TRH
Thyrotropin-releasing hormone
hypothalamus
anterior pituitary
What is the full name, source, and target of TSH
Thyroid-stimulating hormone (thyrotropin)
anterior pituitary
thyroid
TRH promotes secretion of
TSH
PRL
CRH promotes secretion of
ACTH
GnRH promotes secretion of
FSH
LH
GHRH promotes secretion of
GH
PIH inhibits secretion of
PRL
Somatostatin inhibits secretion of
GH and TSH
Function of FSH
- stims secretion of ovarian sex hormones
- dev of ovarian follicles
- sperm production
Function of LH
- stims ovulation
- stim corpus luteum to secrete progesterone
- stim testes to secrete testosterone
Function of ACTH
stims adrenal cortex to secrete glucocoticoids
Function of PRL
stims mammary glands to produce milk
Function of GH
stims mitosis and cellular differentiation
Function of ADH
- incr water retention preventing dehydr
- target: collecting duct
Function of IGF
prolong action of GH
GH half-life
vs
IGF half-life
6-20 min
vs
~20 hrs
Path of sperm