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17 Cards in this Set

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What does the endocrine system regulate?
Growth and development
Reproduction
Lactation
Maintenance of internal envrinonment
Energy production, utilization & storage
Define hormones
chemicals synthesized in ductless glands and secreted into blood, and thereby transported to target tissues where they evoke a specific response.
What do exocrine glands do?
release secretions into ducts that lead to body surface or cavities within the body.
What are three types of hormone or growth factor action?
Endocrine
Paracrine
Autocrine
Describe endocrine
secretion from ductless gland into blood, action at distant tissue.
Describe paracrine
secretion by one cell, action on adjacent cells.
Describe autocrine
secretion from a cell acts on the same cell.
What are the chemical classes of hormones?
Proteins/peptides
Amines
Steroids
What are examples of proteins/peptides?
Thyrotropin-releasing hormone (TRH)
Somatostatin
Prolactin
What are examples of amines?
Dopamine
Adrenaline
Thyroid hormones
What are examples of steroids?
Cholesterol
Progesterone
Cortisol
Testosterone
Define hormone receptors
Minimal chemcial moiety of a target cell that provides specific recognition of a hormone
What do hormone receptors have?
They have sites for hormone binding, signal transduction, and or/interaction with cellular macromolecules.
Where are hormone receptors located?
Located on cell surface or intracellular.
What are three hormones of the hypothalamus?
Growth hormone releasing hormone (GHRH)
Somatostatin (=GH inhibiting hormone)
Gonatotropin releasing hormone (GnRH)
What are the three parts of the
(hypophysis)?
Anterior pituitary
Posterior pituitary
Pituitary stalk
What does the anterior pituitary produce?
Somatotropin (growth hormone)
Follicle stimulating hormone
Luteinizing hormone
Prolactin