Flashcards in Endocrine System I & II Deck (81)
what are the classifications of hormones?
small peptides, polypeptides and proteins = peptide hormones
amino acid and arachidonic acid analog and their derivatives = biogenic amines
what are the two ways target organs can be activated (receptor mechanisms)?
cell surface receptors - unable to penetrate the cell membrane
intracellular receptors - hormones that penetrate plasma and nuclear membrane - no second messenger involved
which hormones use cell surface receptors?
which hormones use intracellular receptors?
what is the functions of endocrine organs?
coordinate body growth and development
what are the two types of feedback?
negative (more common)
what are characteristics common to all endocrine organs?
fenestrated capillaries (sinusoids)
what makes up the diencephalon?
thalamus and hypothalamus
what is the origin of the pituitary gland?
dual: oralectogerm and neuroectoderm
what makes up the anterior pituitary gland?
what makes up the posterior pituitary gland?
whats another name for anterior pituitary?
whats another name for posterior pituitary?
where does the anterior pituitary come from?
Rathke's pouch - oralectoderm
where does the posterior pituitary come from?
which pituitary has an abundance of cells (stains dense)?
what pituitary stains lighter and why?
presence of myelin - nerves etc.
what cells make up the anterior pituitary?
what two types of cells make up acidophils?
what does somatotropes secrete?
GH (growth hormone)
what does mammotrophs/lactotrophs secrete?
what three cell types make up basophils?
what does gonadotrophs secrete?
what does coricortrophs secrete?
what does thyrotrophs secrete?
which chromophils act on other endocrine organs?
basophils = tropic
what does FSH and LH target?
testes or ovaries
what does TSH target?
what does ACTH target?