Anatomy and Physiology - The Endocrine System - Quick Guides | Anatomy and Physiology

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Study GuideAnatomy and Physiology–The Endocrine System1.Quiz: The Hypothalamus and Pituitary Glands1. QuestionCalcitonin is a hormone produced by the __________.Answer Choices• bones• thyroid gland• pituitary glandCorrect Answerthyroid glandWhy This Is CorrectCalcitoninis produced by thethyroid glandand helpslower blood calcium levelsby promotingcalcium storage in bones.2. QuestionWhich hormone targets skeletal muscle cells?Answer Choices• insulin• adrenaline• parathyroid hormone

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Study GuideCorrect AnswerinsulinWhy This Is CorrectInsulinhelps body cells—especiallyskeletal muscle cells—take inglucosefrom the blood forenergy or storage.3. QuestionWhich hormone is produced by the heart?Answer Choices• epinephrine• aldosterone• atrial natriuretic peptideCorrect Answeratrial natriuretic peptideWhy This Is CorrectTheheartproducesatrial natriuretic peptide (ANP), which helps lower blood pressure by promotingsodium and water loss in urine.4. QuestionWhich hormone causes the kidneys to absorb sodium ions into the bloodstream, reducing sodiumloss in urine?

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Study GuideAnswer Choices• aldosterone• adrenaline• atrial natriuretic peptideCorrect AnsweraldosteroneWhy This Is CorrectAldosteroneincreasessodium reabsorptionin the kidneys.When sodium is reabsorbed, water follows, helping increase blood volume and blood pressure.5. QuestionWhich hormone ultimately causes the formation of red blood cells?Answer Choices• calcitriol• thyroxine• erythropoietinCorrect AnswererythropoietinWhy This Is CorrectErythropoietin (EPO)stimulates red blood cell production in the bone marrow, especially whenoxygen levels are low.

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Study Guide6. QuestionWhich hormone causes the pancreas to release digestive enzymes?Answer Choices• gastrin• secretin• cholecystokininCorrect AnswercholecystokininWhy This Is CorrectCholecystokinin (CCK)stimulates the pancreas to releasedigestive enzymesand also helps thegallbladder release bile.7. QuestionWhich hormone is involved in maintaining pregnancy?Answer Choices• progesterone• glucocorticoid• follicle stimulating hormoneCorrect Answerprogesterone

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Study GuideWhy This Is CorrectProgesteronehelps maintain the uterine lining and supports pregnancy by preparing the body forfetal development.8. QuestionThe hypothalamus is connected to the pituitary gland via the __________.Answer Choices• infundibulum• neurohypophysis• diencephalonCorrect AnswerinfundibulumWhy This Is CorrectTheinfundibulumis the stalk that physically connects thehypothalamusto thepituitary gland.9. QuestionThe pituitary gland releases many hormones; however, the __________ directs the release ofpituitary hormones.Answer Choices• thalamus• hypothalamus• pineal gland

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Study GuideCorrect AnswerhypothalamusWhy This Is CorrectThehypothalamuscontrols the pituitary gland by releasing regulatory hormones and sending nervesignals.10. QuestionInhibitory and releasing hormones from the hypothalamus control the __________.Answer Choices• hypophysis• adenohypophysis• neurohypophysisCorrect AnsweradenohypophysisWhy This Is CorrectHypothalamic releasing and inhibiting hormones regulate theanterior pituitary, also called theadenohypophysis.11. QuestionThyroid-stimulating hormone (TSH) is produced by the __________.Answer Choices• adenohypophysis• thyroid gland• adrenal gland

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Study GuideCorrect AnsweradenohypophysisWhy This Is CorrectTSHis produced by theanterior pituitary (adenohypophysis)and stimulates the thyroid gland torelease thyroid hormones.12. QuestionAdrenocorticotropic hormone (ACTH) is produced by the __________.Answer Choices• pineal gland• adrenal gland• adenohypophysisCorrect AnsweradenohypophysisWhy This Is CorrectACTHis made by theanterior pituitary (adenohypophysis)and stimulates the adrenal cortex torelease hormones like cortisol.2.Endocrine Organs and TissuesTheendocrine systemis made up of organs and tissues that producehormones. Hormones arechemical messengers that travel through the blood and help control many body functions like growth,metabolism, reproduction, and homeostasis.

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Study Guide2.1Endocrine Organs OverviewA complete summary of the major endocrine organs, along with their hormones and functions, is givenin:Table 1 in “The Hypothalamus and Pituitary Glands”That table includes the main hormone-producing organs, but it also reminds us of somethingimportant:Some organs arenot mainly endocrine organs, but they still contain special cells that releasehormones.Examples include:•Heart•Gastrointestinal (digestive) tract•Placenta•Kidneys•SkinSo even though these organs have other major jobs (like pumping blood or digesting food), they stillplay a role in hormone control.2.2Eicosanoids (Local Hormones Made by Most Cells)Besides the major endocrine glands, almost all cells in the body also produce a special group ofhormones called:•eicosanoidsImportant note:All cells produce eicosanoidsexcept red blood cells (RBCs).What Makes Eicosanoids Special?Eicosanoids are not “long-distance” hormones like thyroid hormone or insulin.

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Study GuideInstead, they act as:•paracrines(local hormones)That means they usually affect:•nearby neighboring cellsrather than traveling far through the bloodstream.Main Groups of EicosanoidsTwo major groups of eicosanoids are:1.Prostaglandins (PGs)2.Leukotrienes (LTs)Their effects can vary a lot depending on which tissue or target cell they act on.What Do Eicosanoids Affect in the Body?Eicosanoids can influence many important processes, including:•blood pressure•blood clotting•immune responses•inflammatory responses•reproductive processes•contraction of smooth musclesSo even though they act locally, they can have major effects on body function.3.Quiz: Endocrine Organs and Tissues1. QuestionAll cells except erythrocytes produce which kind of hormone?

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Study GuideAnswer Choices• protein• steroid• eicosanoidCorrect AnswereicosanoidWhy This Is CorrectMost body cells (except red blood cells) can produceeicosanoids, which are hormone-like chemicalsmade from fatty acids.They usually act locally and help control inflammation and other functions.2. QuestionLeukotrienes are classified as a(n) __________ hormone and have an effect on __________.Answer Choices• eicosanoid; nearby cells• steroid; distant cells• protein; all cells (nearby and distant)Correct Answereicosanoid; nearby cellsWhy This Is CorrectLeukotrienesareeicosanoids, and they act mainly onnearby cells(local signaling).They play roles in inflammation, immune responses, and allergic reactions.

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