BIO669 ENDOCRINE EXAM 2 2024 -2025 |ACTUAL COMPLETE QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS ) ALREA DY GRADED A+. Permissive Effects of Hormones - ANSWER -A hormone can enable a second hormone to become more functional i.e. GH has a need for thyroid hormone in order 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 Act on intracell ular 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 mole cules 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 frequently 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 Adenohypo physis - ANSWER -The anterior pituitary portal system of linear capillaries Neurohypophysis - ANSWER -The posterior pituitary system that arises from a complex of neurons/axons What is one of the first signs of a pituitary mass? - 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
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