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Anatomy and Physiology - The Endocrine System

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    Study Guide Anatomy and Physiology – The Endocrine System 1. Quiz: The Hypothalamus and Pituitary Glands 1 . Question Calcitonin is a hormone produced by the __________. Answer Choices • bones • thyroid gland • pituitary gland Correct Answer thyroid gland Why This Is Correct Calcitonin is produced by the thyroid gland and helps lower blood calcium levels by promoting calcium storage in bones. 2. Question Which hormone targets skeletal muscle cells? Answer Choices • insulin • adrenaline • parathyroid hormone

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    Study Guide Correct Answer insulin Why This Is Correct Insulin helps body cells — especially skeletal muscle cells — take in glucose from the blood for energy or storage. 3. Question Which hormone is produced by the heart? Answer Choices • epinephrine • aldosterone • atrial natriuretic peptide Correct Answer atrial natriuretic peptide Why This Is Correct The heart produces atrial natriuretic peptide (ANP) , which helps lower blood pressure by promoting sodium and water loss in urine. 4. Question Which hormone causes the kidneys to absorb sodium ions into the bloodstream, reducing sodium loss in urine?

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    Study Guide Answer Choices • aldosterone • adrenaline • atrial natriuretic peptide Correct Answer aldosterone Why This Is Correct Aldosterone increases sodium reabsorption in the kidneys. When sodium is reabsorbed, water follows, helping increase blood volume and blood pressure. 5. Question Which hormone ultimately causes the formation of red blood cells? Answer Choices • calcitriol • thyroxine • erythropoietin Correct Answer erythropoietin Why This Is Correct Erythropoietin (EPO) stimulates red blood cell production in the bone marrow, especially when oxygen levels are low.

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    Study Guide 6. Question Which hormone causes the pancreas to release digestive enzymes? Answer Choices • gastrin • secretin • cholecystokinin Correct Answer cholecystokinin Why This Is Correct Cholecystokinin (CCK) stimulates the pancreas to release digestive enzymes and also helps the gallbladder release bile. 7. Question Which hormone is involved in maintaining pregnancy? Answer Choices • progesterone • glucocorticoid • follicle stimulating hormone Correct Answer progesterone

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    Study Guide Why This Is Correct Progesterone helps maintain the uterine lining and supports pregnancy by preparing the body for fetal development. 8. Question The hypothalamus is connected to the pituitary gland via the __________. Answer Choices • infundibulum • neurohypophysis • diencephalon Correct Answer infundibulum Why This Is Correct The infundibulum is the stalk that physically connects the hypothalamus to the pituitary gland . 9. Question The pituitary gland releases many hormones; however, the __________ directs the release of pituitary hormones. Answer Choices • thalamus • hypothalamus • pineal gland

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    Study Guide Correct Answer hypothalamus Why This Is Correct The hypothalamus controls the pituitary gland by releasing regulatory hormones and sending nerve signals. 10. Question Inhibitory and releasing hormones from the hypothalamus control the __________. Answer Choices • hypophysis • adenohypophysis • neurohypophysis Correct Answer adenohypophysis Why This Is Correct Hypothalamic releasing and inhibiting hormones regulate the anterior pituitary , also called the adenohypophysis . 11. Question Thyroid - stimulating hormone (TSH) is produced by the __________. Answer Choices • adenohypophysis • thyroid gland • adrenal gland

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    Study Guide Correct Answer adenohypophysis Why This Is Correct TSH is produced by the anterior pituitary (adenohypophysis) and stimulates the thyroid gland to release thyroid hormones. 12. Question Adrenocorticotropic hormone (ACTH) is produced by the __________. Answer Choices • pineal gland • adrenal gland • adenohypophysis Correct Answer adenohypophysis Why This Is Correct ACTH is made by the anterior pituitary (adenohypophysis) and stimulates the adrenal cortex to release hormones like cortisol. 2. Endocrine Organs and Tissues The endocrine system is made up of organs and tissues that produce hormones . Hormones are chemical messengers that travel through the blood and help control many body functions like growth, metabolism, reproduction, and homeostasis.

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    Study Guide 2.1 Endocrine Organs Overview A complete summary of the major endocrine organs, along with their hormones and functions, is given in: Table 1 in “The Hypothalamus and Pituitary Glands” That table includes the main hormone - producing organs, but it also reminds us of something important: Some organs are not mainly endocrine organs , but they still contain special cells that release hormones. Examples include: • Heart • Gastrointestinal (digestive) tract • Placenta • Kidneys • Skin So even though these organs have other major jobs (like pumping blood or digesting food), they still play a role in hormone control. 2.2 Eicosanoids (Local Hormones Made by Most Cells) Besides the major endocrine glands, almost all cells in the body also produce a special group of hormones called: • eicosanoids Important note: All cells produce eicosanoids except red blood cells (RBCs). What Makes Eicosanoids Special? Eicosanoids are not “long - distance” hormones like thyroid hormone or insulin.

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    Study Guide Instead, they act as: • paracrines (local hormones) That means they usually affect: • nearby neighboring cells rather than traveling far through the bloodstream. Main Groups of Eicosanoids Two 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 muscles So even though they act locally, they can have major effects on body function. 3. Quiz: Endocrine Organs and Tissues 1 . Question All cells except erythrocytes produce which kind of hormone?

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    Study Guide Answer Choices • protein • steroid • eicosanoid Correct Answer eicosanoid Why This Is Correct Most body cells (except red blood cells) can produce eicosanoids , which are hormone - like chemicals made from fatty acids. They usually act locally and help control inflammation and other functions. 2. Question Leukotrienes 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 Answer eicosanoid; nearby cells Why This Is Correct Leukotrienes are eicosanoids , and they act mainly on nearby cells (local signaling). They play roles in inflammation, immune responses, and allergic reactions.

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