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BIO 669 Endocrine Exam Questions And Correct Answers
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BIO 669 Endocrine Exam Questions AndCorrect Answers
Permissive Effects of Hormones - ANSWER A hormone can allow a second hormone to
become more functional
i.e. GH has a requirement for thyroid hormone to have its full effect
Water Soluble Hormones - ANSWER Circulate in free/unbound forms
Short-acting response
Bind to surface receptors (plasma membrane surface)
Unable to freely cross the plasma membrane
High molecular weight
Lipid Soluble Hormones - ANSWER Steroid and thyroid hormones
Stimulate intracellular receptors that directly activate genes (bind with cytosolic or
nuclear receptors of DNA)
Rapid and long-lasting effects
Bound to carrier proteins in bloodstream
Second Messenger Molecules and Water-Soluble Hormones - ANSWER Second
messenger molecules amplify the effect of one hormone signal into the cell and has
multiple effects on the series of enzymes
i.e. Ca++, cAMP, cGMP, IP3
, IP3 - ANSWER Leads to the formation of calcium into the cell - and that calcium can
often act as a second messenger
Thyroid Hormone is an example of what type of hormone? - ANSWER A lipid soluble
steroid hormone
TH is carrier bound which allows for lower fluctuations in TH blood concentrations
Adenohypophysis - ANSWER The anterior pituitary portal system of linear capillaries
Neurohypophysis - ANSWER The posterior pituitary system that arises from a complex
of neurons/axons
One of the earliest signs of a pituitary mass is the? - ANSWER Double vision
*r/t the position of the optic chiasma and pituitary gland
Anterior Pituitary Releases - ANSWER ACTH
Melanocyte Stimulating Hormone (MSH)
Growth hormone
Prolactin
FSH
LH
TSH
Beta-lipotropin
Beta-endorphins
Posterior Pituitary Releases - ANSWER ADH
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