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Phys. Exam 4 Ant. Pituitary
Anterior pituitary
26
Physiology
Graduate
12/02/2010

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Term
Tropic:
Definition
stimulate
move foward
Term
Trophic:
Definition
to nourish, take care of
Term
Growth Hormone is released by:
Definition
- amino acids
- protein meal
- starvation- ghrelin
- hypglycemia
- exercise
- sleep
Term
exercise and sleep is when growth hormone is tested to see if anterior pituitary is working
Definition
Term
Effects of growth hormone:
Definition
- increased anabolism: amino acid transport, protein synthesis, RNA synthesis
- Slows catabolism
- increases activity of hormone sensitive lipase
- decreases CHO utilization
Term
Growth hormone has an anti-___ effect in that it spares ___ for the brain. So individuals with high growth hormone levels become ___ resistant and can develop Diabetes.
Definition
- anti-insulin effect
- spares CHO
- insulin resistant
Term
Hormone sensitive lipase is upregulated by __ ___. This causes the release of ___ ___ during hypoglycemia (alternate fuel to spare glucose for the brain).
Definition
- growth hormone
- fatty acids
Term
By what two methods does growth hormone spare blood glucose:
Definition
- hormone senstive lipase
- decreasing utilization of CHO
Term
IGF-1, aka ___, aka ___ ___.
Definition
- Somatomedin
- Sulfation factor
Term
Both Insulin and IGF-1 are ___.
Definition
anabolic
Term
Insulin like growth factors do what?
Definition
- mediate action of growth hormone on structural growth
Term
hypothalamus> SRIH (somatostatin release inhibitory hormone) and GHRH (growth hormone releasing hormone)> anterior pituitary releases GH and IGF-1> IGF-1 has negative feedback on GH release from pituitary and negative feedback on release of GHRH on hypothalamus, IGF-1 also stimulates SRIH
Definition
Term
actions of IGF-1:
Definition
- negative feedback on release of GH
- negative feedback on release of GHRH
- stimulates SRIH release from hypothalamus
Term
IGF-1 is made in the ___.
Definition
liver
Term
hypothalamus> GHRH> anterior pituitary> GH> liver> IGF-1> inhibits GH release and GHRH release and stimulates release of SRIH> stops release of GH
Definition
Term
Hypopituitarism:
Definition
- pan (all)
- selective (partial vs. complete)
- Dwarfism (age of onset, androgens)
Term
GH resistance causes:
Definition
- bad receptors
- no IGF
- Bad IGF
Term
Gigantism:
Definition
- excess growth hormone during childhood
Term
Acromegaly:
Definition
- excess GH after epiphyseal plates have closed, so hands feet and and skull continue to grow
- hyperglycemic
- some of this can be managed with analogs of somatostatin
Term
Excess growth hormone associated with :
Definition
hyperglycemia
Term
Excess growth hormone can be treated how:
Definition
analogs of somatostatin
Term
Corticotropes produce ___ from _____.
Definition
- ACTH
- ProOpioMelanoCortin
Term
Melanocyte stimulating hormone:
Definition
MSH
POMC
ACTH
Relationship to stress and cortisol
Term
Opiods:
Definition
Peptide Families
Endorphins (POMC)
Enkephalins (Proenkephalin)
Dynorphins (Prodynorphin)
Endomorphins
Receptors
MOR, DOR, KOR
Drug Targets
Term
Good aspects of opiods:
Definition
Analgesic
Euphoria
Intestinal Tone (anti-diarrhea strategy)
Term
Bad aspects of opiods:
Definition
- tolerance
- physical dependence
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