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53 Cards in this Set

  • Front
  • Back
Endocrine and exocrine glands are derived from?
embryonic epithelium
Do endocrine or exocrine glands loose conncetion with epithelium of orgin?
Endocrine glands
What two ectoderm primordia derive the pituitary gland
Oral extoderm (Rathke's Pouch) and Neural Ectoderm (Infundibulum)
What week does Rathke's pouch lose its connection with the oral cavity
Week 8
Remnants of Rathke's pouch (pharyngeal hypophysis) may lead to?
Carniopharyngioma
Midline invagination of pharyngeal endoderm
Thyroid orgins
What week is the thyroid first visible?
week 4
Found anywhere along path of thyroid displacement, commonly at base of tongue
Aberrant thyroid tissue
Parathyroid gland forms from what pharyngeal pouches?
3 and 4; superior pair originate from dorsal wing of 4th pouch and inferior pair form from dorsal wing of 3rd pouch
What week are parathyroid glands recognizable
week 5
Thyroid follicular cells are derived from
Thyroid diverticulum (endoderm)
Parafollicular cells (C cells) are derived from
Neural crest from ultimopharyngeal body
C-cells produce calcitonin which decrease serum Calcium
The infundibulum of Rathke's pouch forms
Pituitary stalk and posterior lobe
The posterior wall of Rathke's pouch forms
Pars intermedia
Superior extension (of anterior lobe) of Rathke's Pouch forms; What week does this form
Pars tuberalis; week 11
Anterior wall of Rathke's pouch forms
Anterior lobe, pars distalis
Precursor of Pituitary Gland
Ectoderm
Precursor of thyroid gland
Endoderm of pharynx, displaced ventrally (C cells from neural crest)
Precursor of Parathyroid gland
Endoderm of pharynx displaced ventrally
Precursor of Adrenal Gland
Mesoderm (Cortex) (the medulla is from neural crest)
The fetal adrenal cortex is stimulated by
HcG from the trophoblasts
When does the definitive adrenal gland reach normal size?
when the Child is 2
Congenital Adrenal Hyperplasia
enzyme (commonly 21-hydroxylase) needed to make cortisol and/or aldosterone is mutated so steroid pathway is shunted toward androgens --> enlarged adrenal cortex (due to incr ACTH), boys get early devo of secondary sex characteristics, girls get enlarged clitoris/ambiguous genitalia
At what week is LH/FSH, GH present
week 10
What week is the Pouch connection with oral cavity lost?
week 8
At what week are the thyroid follicles visible?
Week 10
What week is thyroid hormone produced?
week 12
What week does the throglossal duct close?
Week 11
At what week does the adrenal cortex forn
Week 4
A cells
Glucagon
B cells
Insulin
D cells
Somatostatin
F cells
Pancreatic Polypeptide
Chief cells in parathyroid
More abundant than oxyphil cells
Make PTH
Follicular cells histology
Simple cuboidal wall of colloid follicle
Histology of thyroid with low TSH
squamous epithelium, high colloid (colloid goiter)
Histology of thyroid with High TSH
Columnar epithelium, low colloid (parenchymatous goiter)
Zona glomerulosa
primary controlled by renin angiotensin
Secretes aldosterone
Zona fascuculata
Controlled by ACTH and CRH
Secretes cortisol and sex hormones
Zona Retucularis
Stains dark
Controlled by ACTH and CRH
Secretes Sex hormones
Adrenal Medulla
Controlled by Pre-ganglionic sympathetic fibers
Secretes Norepinephrine and Epinephrine
For group 1 hormones (aka steroids, iodothyronines)
List: solubility, transport, 1/2 life, receptor location, and mediator
Lipophilic
Transport proteins
Long (hrs-days)
Intracellular receptor
Receptor-hormone complex
For Group 2 hormones (polypeptides, proteins, catecholamines, glycoproteins)
List: solubility, transport, 1/2 life, receptor location, and mediator
Hydrophilic
NO transport proteins
Short half life
Plasma membrane receptor
cAMP, cGMP. Ca++,kinase cascades
List the parts of the pituitary
List the parts of the pituitary
From top to bottom:
Pars distalis (adenohypophysis) (more blood vessels)
Pars intermedia
Pars nervosa (neurohypophysis) (has pituicytes present)
From top to bottom:
Pars distalis (adenohypophysis) (more blood vessels)
Pars intermedia
Pars nervosa (neurohypophysis) (has pituicytes present)
Pancreatic islet (of Langerhans)
From left to right: medulla, zona reticularis, zona fasciculata, zona glomerulosa, capsule
What part of the adrenal cortex?
What part of the adrenal cortex?
Zona fasciculata
What part of the adrenal cortex?
What part of the adrenal cortex?
Zona Reticularis
What part of the adrenal cortex?
What part of the adrenal cortex?
Zona Glomerulosa
Name cells from left to right
Name cells from left to right
In parathyroid
Two Chief cells
Oxyphil cell
In thryroid
In thryroid
C-cell cluster
Pink centers are colloid that are surrounded by follicular cells
follicular epithelium?
amount of colloid?
Treatment?
follicular epithelium?
amount of colloid?
Treatment?
Columnar (normal is cuboidal)
Low colloid
Treated with propylthiouracil (blocks thyroperoxisase activity)
Columnar (normal is cuboidal)
Low colloid
Treated with propylthiouracil (blocks thyroperoxisase activity)
follicular epithelium?
amount of colloid?
Treatment?
follicular epithelium?
amount of colloid?
Treatment?
Squamous
High colloid
One month after pituitary removal (no TSH-->no T4 release from thyroid colloid)