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PDA II Exam 3 Material
Hypothalamus and Pituitary Gland
121
Health Care
Professional
03/23/2009

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Term
This structure is an air-filled, tissue-lined sinus that drains into the nose.
Definition
Sphenoid sinus
Term
This structure contains a network of veins for the brain.
Definition
Cavernous sinus
Term
These structures are the main blood supply to the brain.
Definition
Carotid arteries
Term
This structure provides facial and eye sensation:
Definition
Fifth cranial nerve
Term
This structure is where the optic nerves partially cross.
Definition
Optic chiasm
Term
The hypothalamus is located at the base of the brain _____ the optic chiasm.
Definition
Below
Term
This is a fluid that submerges the whole brain, providing mechanical protection and is important for distributing neuro-endocrines, as well as maintaining pressure on the brain:
Definition
Cerebrospinal fluid (CSF)
Term
Cerebrospinal fluid is produced in the:
Definition
Lateral ventricles and third ventricle
Term
The pituitary gland sits in this structure, which causes pituitary tumors to grow upward.
Definition
Sella turcica
Term
Pituitary tumors may cause these complications, in addition to hormonal problems:
Definition
Blindness, block CSF flow
Term
The hypothalamus links the _________ system to the _________ via the pituitary gland.
Definition
Nervous, endocrine
Term
The hypothalamus affects and regulates:
Definition
BP, HR, hunger, thirst, sexual arousal, body temperature, and the sleep/wake cycle
Term
When BP is low, baroreceptors give signals to the hypothalamus which cause an increase in:
Definition
Antidiuretic hormone --> retain water, decrease urination, vasoconstriction --> increase BP
Term
HYPOTHALAMUS release of this hormone may increase aldosterone:
Definition
Corticotrophin releasing hormone.
Term
The adenohypophysis is better known as the:
Definition
Anterior pituitary gland
Term
The neurohypophysis is better known as the:
Definition
Posterior pituitary
Term
The posterior pituitary gland releases these two hormones:
Definition
ADH and oxytocin
Term
These structures connect the hypothalamus and anterior pituitary:
Definition
Hypothalamic-hypophyseal portal veins
Term
GHRH affects these anterior pituitary gland cells:
Definition
Somatotrophs
Term
Gonadotrophin Releasing Homone affects these anterior pituitary cells:
Definition
Gonadotrophs
Term
Thyrotrophin Releasing Hormone affects these cell types:
Definition
Lactotrophs, Thyrotrophs
Term
Corticotrophin Releasing Hormone affects these anterior pituitary gland cell types:
Definition
Corticotrophs
Term
These are the five major homones released from the hypothalamus:
Definition
Growth hormone-releasing hormone (GHRH), Somatostatin, Thyrotropin-releasing hormone (TRH), Corticotrophin-releasing hormone (CRH), Gonadotrophin-releasing hormone (GnRH)
Term
GHRH stimulates the release of this anterior pituitary hormone:
Definition
Growth Hormone
Term
The major targets for GH are:
Definition
Liver, bone, muscle, etc.
Term
This substance released from the liver has an inhibitory effect on GH secretion by stimulating somatostatin release from the hypothalamus:
Definition
IGF-1 (Insulin-like Growth Factor-1)
Term
These peptides act as part of a GH negative feedback loop:
Definition
Somatostatin, IGF-1
Term
This substance found primarily in the stomach acts synergistically with GHRH to release GH.
Definition
Ghrelin
Term
Ghrelin is secreted by the gastric fundal cells during the ______ state.
Definition
Fasting
Term
This drug is a GHRH analog:
Definition
Sermorelin
Term
This GHRH analog is indicated for GH deficiency when the somatotroph is intact:
Definition
Sermorelin
Term
Sermorelin is indicated for:
Definition
GH deficiency when the somatotrohp is intact; GH deficiency diagnosis
Term
This is the major inhibitory peptide in the body:
Definition
Somatostatin
Term
Somatostatin inhibits the release of ___ and ___ from the anterior pituitary, as well as ___ and ___ from the pancreas.
Definition
GH, TSH; insulin, glucagon
Term
Somatostatin inhibits these gastrointestinal hormones:
Definition
Gastrin, cholecystokinin
Term
This is a hormone that stimulates secretion of gastric acid by the parietal cells of the stomach, as well as aiding in gastric motility.
Definition
Gastrin
Term
This is a peptide hormone of the gastrointestinal system that causes the release of digestive enzymes and bile from the pancreas and gallbladder, respectively.
Definition
Cholecystokinin
Term
This drug is a synthetic analog of somatostatin:
Definition
Octreotide
Term
Octreotide is used over natural somatostatin because:
Definition
It has a much longer half-life
Term
Octreotide is indicated to treat:
Definition
Vasoactive Intestinal Peptide tumors, metastatic carcinoid tumors, pituitary tumors, acromegaly, and thyrotropinomas
Term
Octreotide acts by:
Definition
Inhibiting pituitary and gastric hormones, glucagons, insulin, and GH
Term
These hormones inhibit Thyrotropin-releasing hormone:
Definition
Thyroid hormones (T3 and T4)
Term
This drug is a parenteral synthetic tripeptide that is identical to natural TRH:
Definition
Protirelin
Term
Protirelin is used:
Definition
To assess thyroid function
Term
If a person has hyperthyroidism and is given protirelin, what is the response?
Definition
A blunted response (i.e., Protirelin does nothing)
Term
If a patient with hypothyroidism is administered protirelin, what is the response?
Definition
Stimulate TSH --> increased levels of TSH
Term
Corticotropin releasing hormone stimulates the release of this anterior pituitary hormone:
Definition
Adrenocorticotropic hormone
Term
The target for adrenocorticotropic hormone is the:
Definition
Adrenal glands
Term
This hormone released from the adrenal gland inhibits hypothalamic and pituitary secrections of CRH and ACTH respectively:
Definition
Cortisol
Term
Corticotropin releasing hormone stimulates the release of ACTH and ____.
Definition
B-Endorphin
Term
Corticotropin releasing hormone has a synergistic effect with this hormone:
Definition
ADH
Term
Release of this molecule by CRH may cause euphoria ("Runner's High"):
Definition
B-endorphin
Term
Gonadotropin releasing hormone stimulates the release of these hormones:
Definition
Luteinizing hormone and Follicle Stimulating Hormone
Term
The gonadotropins act on:
Definition
The testes and ovaries (i.e. gonads)
Term
GnRH and LH/FSH release is inhibited by the release of ___ from the testes and ______ and _______ from the ovaries.
Definition
Testosterone; estrogen, progesterone
Term
This drug is a parenteral gonadotropin releasing hormone:
Definition
Gonadorelin
Term
Gonadorelin is clinically used to treat:
Definition
Primary hypothalamic amenorrhea and infertility
Term
These 5 hormones are released by the anterior pituitary gland:
Definition
Growth Hormone, prolactin, thyroid stimulating hormone, adrenocorticotropic hormone, gonadotropins (LH, FSH)
Term
GH stimulates the release of IGF-1 in the liver, which indirectly:
Definition
Stimulates bone growth
Term
GH acts directly on adipocytes, causing:
Definition
Glycolysis --> stimulates the release of fatty acids
Term
GH is controlled through negative feedback by:
Definition
IGF-1 --> stimulates somatostatin release
Term
GH secretion is described as:
Definition
Pulsatile
Term
Potent stimulation of GH in children is a result of:
Definition
Deep sleep
Term
GH secretion is pulsatile to avoid:
Definition
Desensitization
Term
This drug is a purified recombinant growth hormone by using either E. coli or mammalian cells:
Definition
Somatropin
Term
Somatropin is used to treat:
Definition
Growth failure due to GH deficiency; cachexia and AIDS wasting
Term
Too little GH causes this disease:
Definition
Dwarfism
Term
Children with too much GH experience this disease:
Definition
Gigantism
Term
Adults with too much GH experience this disease:
Definition
Acromegaly
Term
Prolactin is released by:
Definition
Lactotroph cells
Term
Prolactin is normally inhibited by:
Definition
Dopamine
Term
Prolactin regulates:
Definition
Mammary gland developmen and milk production
Term
Prolactin secretion is stimulated by:
Definition
Estrogen
Term
During pregnancy, estrogen antagonizes:
Definition
Prolactin action in the breast
Term
The main stimulus for prolactin release is:
Definition
Suckling
Term
The prolactin releasing factors are:
Definition
TRH and oxytocin
Term
Prolactin inhibits the release of ___, which blocks ovulation/mences.
Definition
LH and FSH
Term
Prolactin antagonizes the release of:
Definition
GnRH
Term
Prolactinoma may lead to:
Definition
Hyperprolactinemia, amenorrhea, glactorrhea
Term
The treatment for hyperprolactinemia, amenorrhea, and galactorrhea (Prolactinoma) is:
Definition
Bromocriptine/other DA agonists
Term
Thyroid stimulating hormone is released by:
Definition
Throtroph cells
Term
The thyroid hormone Thyroxine is better known as:
Definition
T4
Term
The thyroid hormone triiodothyronine is better known as:
Definition
T3
Term
The thyroid hormones help regulate:
Definition
Metabolism, growth, development, etc.
Term
Adrenocorticotropic hormone is released by:
Definition
Corticotrophs
Term
ACTH targets this organ:
Definition
Adrenal cortex
Term
One of the physiological symptoms of an corticotroph tumor is:
Definition
Darkened skin due to increased levels of Melanocyte Stimulating Hormone (MSH)
Term
The gonadotropins are relased by:
Definition
Gonadotrophs
Term
The target organs for the gonadotropin hormones are the:
Definition
Ovaries and testes
Term
The structures of LH and FSH share these same structural characteristics:
Definition
Dimers with identical alpha subunits
Term
LH stimulates the release of:
Definition
Testosterone and estrogen
Term
LH stimulates this process:
Definition
Ovulation
Term
FSH stimulates the maturation of:
Definition
Ovary follicles
Term
This hormone is critical for spermatogenesis:
Definition
FSH
Term
This class of pharmaceutical agents may be used to treat amenorrhea, infertility, endometriosis, and uterine fibroid:
Definition
GnRH analogs
Term
FSH is clinically used:
Definition
To stimulate ovulation for in vitro fertilization
Term
GnRH antagonists are used to:
Definition
Improve implantation and pregnancy (suppress LH surge)
Term
These hormones are released by the posterior pituitary gland:
Definition
Oxytocin and ADH
Term
The release of oxytocin causes:
Definition
Contraction of the uterine smooth muscle
Term
The release of oxytocin causes:
Definition
Contraction of the uterine smooth muscle
Term
ADH is produced by:
Definition
Magnocellular cells
Term
ADH binds to V1 receptorscausing:
Definition
Vasoconstriction
Term
ADH binds to V2 receptors causing:
Definition
Increased water resorption
Term
ADH is stimulated by:
Definition
Angiotensin II
Term
ADH increases the expression of:
Definition
Water channels in the apical membrane
Term
ADH stimulates the expression of this water channel:
Definition
Aquaporin
Term
Excessive secretion of ADH may cause this disease:
Definition
Syndrome of Inappropriate ADH (SIADH)
Term
Syndrome of Inappropriate ADH is caused by:
Definition
Excessive secretion of ADH
Term
Syndrome of inappropriate ADH may cause these symptoms:
Definition
Ectopic secretion of ADH (carcinoma in the lung), hypertension, and excessive fluid retention
Term
Deficient secretion of ADH may cause this disease:
Definition
Diabetes INSIPIDUS
Term
Neurogenic diabetes insipidus is caused by:
Definition
Failure of ADH secretion
Term
Nephrogenic diabetes insipidus is caused by:
Definition
Sensitivity of the kidney to ADH
Term
These drugs block the release of ADH causing a higher volume of urine output:
Definition
Ethanol and caffeine
Term
Excess ADH may cause this electrolyte imbalance:
Definition
Hyponatremia
Term
This drug is a synthetic drug that mimics the action of ADH:
Definition
Desmopressin
Term
Desmopressin is clinically used:
Definition
To reduce urine production in central diabetes insipidus patients; used to treat bedwetting in children
Term
This tetracycline antibiotic is used to treat patients with hyponatremia due to excessive secretion of ADH:
Definition
Demeclocycline
Term
One of the adverse effects for demeclocycline is________, which makes it useful for treating Syndrome of Inappropriate ADH.
Definition
Nephrogenic diabetes insipidus
Term
Oxytocin is released mainly after:
Definition
Distension of the cervix and vagina during labor
Term
Oxytocin causes:
Definition
Uterine contraction, letdown reflex in lactating mothers
Term
This synthetic hormone is used to induce labor:
Definition
Oxytocin
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