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25 Cards in this Set

  • Front
  • Back
Name five functions of the Endocrine System.
- Response to stress and injury
- Growth and Development
- Resproduction
- Homeostasis at Ion level
-Energy Metabolism
Hormones are:
-Chem subs synthesized and secreted by specific tissues/organs.
- Secreted in very low concentrations
- Exert marked metabolic and biochemical effects on target cells.
- Are inactivated im the liver and secreted through the kidneys
Describe Negative Feedback:
- High levels of a substance INHIBIT hormone secretion and synthesis
- Low levels of a substance STIMULATE synthesis secretion
Name the two causes problems with the Endocrine system:
Target organ problen(End Organ)
Control organ problem (Production of hormone)
Describe simple negative feedback:
Decreased Ca+ and increased Pth= Increased Ca+ and decreased Pth
Describe complex negative feedback:
TRH
TSH
Another name for circadian rhytms:
Diurnal rhythm
It is fluctuation of hormones over 24 hour period related to sleep-wake or dark light cycles
Name two types of hormonal dysfunctions:
1- Hypofunction
2- Hyperfunction
Describe Hypofunction
Hypofunction either of Target organ (decrease of hormone released from the pituitary = decrease in target organ release of hormone)
or control mechanism (target organ decrease in hormone secretion = pituitary releasing MORE hormone to make up for it.
Decribe Hyperfunction
Either of Control Mechanism (Increase in stimulating hormone from pituitary= increases target organ hormone release
Or Target organ (Increase in target organ hormone released = Pituiatry gland releases
LESS stimulationg hormone.
Name some changes to watch for during assessment:
Nutrition- elimination- sleep-sexual activity- Anxiety-
Diagnostic Tests for Endocrine dysfunction:
Stimuation Test
Supression Test
Radioimmunoassay
Urine/Blood
Radiographic
Name a substance that when secreted by endocrine system are hormones but when secreted Hypoby neurons are neurotransmitters
Epinephrine (Catecholamines)
Hypothalamus
What is the Target Organ?
Name the Hormones released?
Target Organ= Hypothalmic Hypophysial Portal System
Hormones Released: GRH, CRH, GnRH, TRH, PRH
Inhibited: Somastatin, PIH
Pituitary Gland
What are the two distinct sections called:
'Master Gland'
Two sections:
Anterior (Adenohypophysis)
Posterior (Neurohypophysis)
Pituitary Hormones of Adenohypophysis are:
Remember:
Get a Life: TSH & ACTH
Get a Tan: MSH
Grow Up: GH
To have Sex: FSH, LH, PRL
TSH Target organ:

Its Function:
Thyroid Gland

Stimulates Growth Hormone and Protein Synthesis
ACTH Target organ:

Its Function:
Adrenal Cortex

Growth of Adrenal cortex, Secretion of corticosteroids CORTICOTROPIC HORMONE
GH Target Organ:

Its Function:
Bone and soft tissue

Promotes body growth, Enhances Protein synthesis
MSH Target Organ:

Its Function:
Melanocytes

Skin Pigmentation
LH & FHS Target Organs:

Their Functions:
Ovaries & Testes

Sex Cell Production, Sex hormome secretion, Reproductive organ growth
PRL Target Organ:

Its Function:
Mammary Glands

Stimulate Milk Production, Breast development
Pituitary Hormones of
Neurohypophysis are:
ADH

Oxytocin
ADH Target organ:

Its Function:
Renal Tubules
**MOST Important for Maintainance of OSMOLALITY**
Fluid Volume Control (by renal tubule stimulation)
Oxytocin Target Organ:

Its Function:
Mammary Glands