BIO 270 Exam 4 (final) – Hynd Exam Study Guide Solutions
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Course
Bio 270
Institution
Bio 270
BIO 270 Exam 4 (final) – Hynd Exam Study
Guide Solutions
endocrinology - ANSWER-study of homeostatic activities accomplished by hormones
hormone - ANSWER-chemical released into blood to regulate distant target cells
hormones exert effect on _____ cells some distance away from the site of rele...
- (Only cholesterol is stored in significant quantities)
4) Following secretion, some steroid hormones, and thyroid hormone, are changed into more potent or
different hormones
peptide hormones dissolve in .... - ANSWER✔✔-blood
how are steroid/thyroid hormones transported? - ANSWER✔✔-cannot dissolve in blood, bind to plasma
proteins
some plasma proteins only carry _____ lipophilic hormones, while others (albumin) pick up ____
hormone - ANSWER✔✔-specific, any
transport of catecholamines - ANSWER✔✔-50% circulate as free hormones, 50% bind to albumin
only (bound/unbound) hormones are active and capable of binding with target cell receptors, why? -
ANSWER✔✔-unbound - ensures large reserve pool to replenish "free" pool
to induce a response, hormones must bind to.... - ANSWER✔✔-receptors associated with their target cell
hormone receptor - ANSWER✔✔-protein that recognizes and binds to a specific hormone, can be on the
plasma membrane or inside the cell
target cell - ANSWER✔✔-have receptors for hormone, will change cellular process when hormone binds
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