Bio 169 exam 1 study guide with complete solutions

Bio 169 exam 1 study guide with complete solutions endocrine system - Answer️️ -Composed of ductless glands that synthesize and secrete hormones Hormones are released into the blood and transported throughout the body target cells - Answer️️ -cells that have receptors for a particular hormone endocrine glands - Answer️️ -Glands of the endocrine system that release hormones into the bloodstream comparison of both systems - Answer️️ -Both the endocrine and nervous system Release ligands—chemical messengers Difference between the two systems - Answer️️ -Unlike the nervous system, the endocrine system Transmits hormones through the blood Targets any cells in the body with correct receptors Can be very widespread Exhibits longer reaction times Has longer-lasting effects (minutes to days and weeks) hormonal stimulation - Answer️️ -A gland cell releases its hormone when some other hormone binds to it Humoral stimulation - Answer️️ -A gland cell releases its hormone when there is a certain change in levels of a nutrient or ion in the blood ©SOPHIABENNETT EXAM SOLUTIONS_2024/2025 Tuesday, September 3, 2024 10:30 AM Page | 2 Nervous stimulation - Answer️️ -A gland cell releases its hormone when a neuron stimulates it Steroids - Answer️️ -Lipid-soluble molecules synthesized from cholesterol Biogenic amines - Answer️️ -Modified amino acids, Water-soluble except for thyroid hormone (TH) TH is nonpolar (made from a pair of tyrosines) and lipid soluble Proteins - Answer️️ -Most hormones are in this category Water-soluble chains of amino acids Lipid-Soluble Hormones - Answer️️ -Lipid-soluble hormones can diffuse across target cell membrane, The complex binds to a hormone-respo