final - endocrine, male and female reproductive Flashcards
Endocrine system
- uses chemical com.
- starts/stops slowly
- widespread effects; less specific than nervous system
Nervous system
- Uses both chemical and electrical com
- starts/stops fast
- local effects; precise
exocrine glands
secrete products into ducts
endocrine glands
secrete product directly into blood stream
What makes cells a target for hormones?
receptors for that hormone
what are the different classes of hormones?
- Lipid soluble
- Water soluble
- Amine Hormones
- Local Hormones
Lipid Soluble Hormones
go into the cell to produce mRNA, which makes protein
-steroid, TH, and calcitriol
steroids
not stored, protein bound so they are slow acting with the exception of aldosterone
TH
goes into nucleus of cell and binds directly to a gene
Calcitriol
Vitamin D
Water soluble
protein hormones - ADH
-unbound and have short life
amine hormones
- Thyroid
- Catecholamines
Thyroid
- hydrophobic
- long life due to fat solubility
catecholamines
Hydrophilic
local hormones
- also known as paracrine hormones
- eicocanoids and arachidonic acid
Eicocanoids
- primary local hormone
- control over inflammation, immunity, and acts as a messenger in CNS
Arachidonic Acid
-precursor for inflammatory response
Anti-Inflammatory drugs
-prevent Arachidonic acid from being pulled down and used
Hypothalamus
- regulates pituitary gland and primitive functions of the body
- releases 2 hormones to be stored in p. pituitary
pituitary gland
- Anterior: releases TSH, PRL,FSH, GH
- Posterior: stores ADH and Oxytocin
Pineal gland
produces melatonin
shrinks as we age
Thyroid gland
secretes calcitonin
parathyroid
promotes synthesis of calcitriol
adrenal gland
medulla: produces catecholamines
cortex: produces corticosteroids
pancreas
produces insulin
how are endocrine glands regulated?
negative and positive feedback
negative feedback
large amounts of hormones cause it to stop being produced or the release of something to lower it
positive feedback
high levels of a hormone cause more to be released
Hypothyroidism
lack of TH
hyperthyroidism
too much TH
Diabetes
the inability of the body to control blood glucose levels
how are hormones cleared from the body?
water soluble: the kidney
fat soluble: through bile
3 ways that hormones react with one another
- synergistic
- antagonistic
- permissive
synergistic
2+ hormones act together to have a greater effect
antagonistic
one hormone opposes the actions of another
ex. insulin and glucagon
permissive
1 hormone enhances target organs response to a second hormone secreted later
stress response
- alarm reaction
- stage of resistance
- stage of exhaustion
alarm reaction
catecholamines are released from nervous system (fast response)
stage of resistance
cortisol and catecholamines have longer lasting effects
stage of exhaustion
depleting reserves of the body because of all the cortisol
Paracrine secretions
large group of signaling hormones that don’t circulate in the blood
what determines if a child will be genetically male or female?
the X or Y chromosome in the sperm that fertilized the egg
purpose in meiosis in men and its products
- 4 sperm are produced
- meant to produce sperm for reproduction
seminal vessicle
produce sticky secretion that entangles sperm and sticks to inside of vagina
Bulbourethral gland
produce clear fluid to lubricate head of penis for sex
prostate gland
produces a secretion that buffers the acidity of the urethra and vagina
ductus deferens
carries sperm from epididymis to ejaculatory duct
Epididyimis
site of sperm maturation and storage
ejaculatory duct
last of spermatic ducts before urethra
path that sperm takes
efferent duct - epididymis - ductus deferens -ejaculatory duct
penis
deposit semen and empty bladder
scrotum
house testis and keeps them cool
spermatic cord
houses ductus deferens, blood/lymph vessels, and testicular nerve
testis
produce sex hormones and sperm
parts of a sperm
head and tail
head
- nucleus: contains genes
- acrosome: contains enzymes necessary to penetrate egg
tail
-Midpiece: contains mitochondria