Endocrine System Flashcards
cells that produce steroid hormones contain a lot of what type o structure?
smooth ER
ductless glands that secrete their products internally
Endocrine Glands
what are the two types of hormones?
circulating
Local
What are the two types of Local Hormones
Paracrine
Autocrine
Hormones that act on neighboring cells
Paracrine Hormones
Hormones that act on the same cells that is is secrete from
Autocrine Hormones
Hormones that are secreted into the circulatory system and act on any cell that has the appropriate receptor
circulating hormones
what does the the pineal gland secrete?
melatonin
Where are antidiuretic hormone and oxytocin made
Hypothalamus
What does the thyroid secrete
calcitonin
thyroid hormone
Where are antidiuretic hormone and oxytocin secreted from
Posterior Pituitary
what is the embryological origin or the diencephalons
prosencephalon
what secondary vesicle does the hypothalamus originate from?
diencephalons
main visceral (autonomic) control center for the body
Hypothalamus
the secretions from this gland can regulate other glands
Hypothalamus
What connects the hypothalamus to the Posterior Pituitary
The infundibulum
what two glands regulate virtually all aspects of growth, development, metabolism, and homeostasis
the hypothalamus and the pituitary gland (hypophysis)
master gland for the endocrine system
pituitary gland (hypophysis)
How many hormones does the Hypothalamus produce?
9
What gland is considered Command Center for Endocrine System
Hypothalamus
to see the relationship between the hypothalamus and the the pituitary gland what section should the brain be viewed?
Sagittal
Where is the pituitary gland located in relation to the nasal cavity?
posterior corner of the roof
Where does the pituitary gland sit?
hypophyseal fossa or sella turcica of sphenoid bone
Cords of epithelial cells interspersed with fenestrated capillaries in the anterior pituitary
Pars Distalis
A series of colloid-filled follicles in the anterior pituitary
Pars Intermedia
What represent the residual lumen of Rathke’s pouch
colloid-filled follicles
What part of the anterior pituitary gland forms a collar or sheath around infundibulum
Pars Tuberalis
most of the cells in the ___ are basophilic gonadotropic cells
Pars Tuberalis
Contains neurosecretory axons and their endings from the hypothalamus
Pars Nervosa
Regulating hormones from the hypothalamus reach the anterior lobe via the
hypothalamo-hypophyseal portal system
where hormones travel down the axons of the neurosecretory cells to the axon terminals where they exit via exocytosis
hypothalamic
Human growth hormone is secreted from what type of cells
Somatotropes
Thyroid-Stimulating Hormone is secreted from what type of cells
Thyrotropes
Follicle-Stimulating Hormone is secreted from what type of cells
Gonadotropes
Luteinizing Hormone is secreted from what type of cells
Gonadotropes
Prolactin is secreted from what type of cells
Lactotropes
Adrenocorticotrophic is secreted from what type of cells hormone
Corticotropes
Melanocyte-Stimulating Hormone is secreted from what type of cells
Corticotropes
what type of cell are Corticotropes
Basophil - Chromophil
what type of cell are Lactotropes
Acidophil - Chromophil
what type of cell are Gonadotropes
Basophil - Chromophil
what type of cell are Thyrotropes
Basophil - Chromophil
what type of cell are Somatotropes
Acidophil - Chromophil
Chromophobes and Chromophils make up half the cell population in what?
Pars distalis
Reserve of primitive/ undifferentiated cells in the Pars Distalis
Chromphobes
Where is the hormone stored in Chromophils
cytoplasmic granules
Least numerous cell but they have the most numerous cell types
Basophils
powerful cells where a little bit goes a long way
basophils
what regulates the anterior pituitary gland?
Hypothalamus
what regulates all other glands
Anterior Pituitary
which if the chromophils is most active
acidophil
stimulates the release of Melanocyte-stimulating hormone
Corticotropin-releasing hormone
suppresses the release of Melanocyte-stimulating hormone
Dopamine (Prolactin- inhibiting hormone)
stimulates the release of Adrencoritcotropic hormone (ACTH)
Corticotropin-releasing hormone
suppresses the release of prolactin
Prolactin- inhibiting hormone (Dopamine)
stimulates the release of Follicle stimulating hormone
Gonadotropin-releasing hormone
stimulates the release of Luteinizing hormone
Gonadotropin-releasing hormone
stimulates the release of Thyroid-stimulating hormone
Thyrotropin- releasing hormone
suppresses the release of Thyroid-stimulating hormone
Growth hormone- inhibiting hormone