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21 Cards in this Set

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  • Back
Catecholamine
a class of hydrophlic chemical messengers dericed from tyrosine
Eicosanoids
a group of lipid-soluble compounds derived from arachidonic acid that includes leukotrienes, prostaglandins, prostacyclins, and thromboxanes
Exocrine axis
the integrated combination of the hypothalamus, hypophysis and target organ and the hormones secreted by each gland
Endocrine gland
a ductless gland producing an internal secretion that is discharged into the blood or lymph and circulated to all parts of the body
Glycoprotein hormones
a class of protein hormones consisting of 2 chains, each of which is modified by addition of carbohydrate residues
Growth factors
a diverse group of chemical messengers that stimulate mmitosis of specific cell types
Half-Life
the amount of time required for 50% of a substanceto be degraded
Inhibiting Hormones
hormones secreted by the hypothalamus that inhibit the secretion of horones from the adenohypophysis
Endocrinology
the study of the endocrine glands and their products, hormones
Long-Loop Feedback
the ability of the hormone secreted by the final target gland to regulate the secretion of hypothalamic and adenohypophysis
Mixed Gland
a gland having endocrine and exocrine components
Pheromones
a chemical messenger released into the external environment by one member of a species to modify the physiology of a different member of the sam species
Preprohormone
a precursor to a hormone that is converted to a prohormone by removal of the signal sequence
Primer pheromone
a pheromone hat causes a relatively slow behavioral response in the target organism
Prohormone
a precursor to a hormone that is modified, most often through a cleavage reaction, to generate the active form of the hormone
Releaser (signaler) pheromone
a pheromone that induces a relatively rapid behavioral response in the target organism
Releasing hormone
hormones secreted by the hypothalamus that stimulates the secretion of hormones from the adenohypophysis
Short-loop feedback
the ability of adenohypophyseal hormones to regulate the secretion of hypothalamic hormones
Steroid Hormones
a class of lipid-soluble hormones derived from cholesterol
Trophic hormone
a hormone that stimulates and maintains the size and function of a target land
Ultarshort-loop feedback
the ability of hypothalamic hormones to regulate their own secretion