Endocrine System

Endocrine System Study Guide

Chapter Overview

  • The endocrine system consists of glands that secrete hormones, which are chemical messengers that reach target organs to regulate various functions in the body.

Learning Objectives

  • Recognize and list the functions of the endocrine system.

  • Understand word parts related to Chapter 14, utilizing them to build and analyze terms.

  • Identify specific structures of the endocrine system alongside their associated hormones and functions.

  • Match and write diagnostic terms and pathologies related to the endocrine system based on given descriptions.

  • Correctly spell terms pertinent to the endocrine system.

  • Understand and connect surgical and therapeutic interventions with their descriptions.

Functions of the Endocrine System

  • Functions of Glands

    • Glands secrete hormones.

    • Hormones act as chemical messengers.

    • Target organs respond to these hormonal signals.

  • Dysfunctions

    • Hyposecretion: insufficient hormone production.

    • Hypersecretion: excessive hormone production.

Gland Types

Exocrine vs. Endocrine Glands

  • Exocrine Glands (have ducts)

    • Secretion is delivered through ducts to specific sites.

  • Endocrine Glands (ductless)

    • Hormones are released directly into the bloodstream.

Major Endocrine Glands

  • Hypophysis (Pituitary)

  • Adrenal Glands

  • Ovaries (in females)

  • Pineal Gland

  • Thyroid Gland (with parathyroids on the posterior surface)

  • Pancreas (Islets of Langerhans)

  • Testes (in males)

Thyroid Gland Anatomy

  • Left Lobe of Thyroid Gland

  • Right Lobe of Thyroid Gland

  • Parathyroid Glands

  • Trachea

Combining Forms in the Endocrine System

  • Common Terms

    • aden/o: gland

    • adren/o, adrenal/o: adrenal glands

    • andr/o: male or masculine

    • gigant/o: giant

    • gonad/o: gonad

  • Additional Terms

    • insulin/o: insulin

    • iod/o: iodine

    • myx/o: mucus

    • pancreat/o: pancreas

    • parathyroid/o: parathyroid glands

    • ren/o: kidney

    • thyr/o, thyroid/o: thyroid gland

    • toxic/o: poison

Suffixes Relevant to the Endocrine System

  • -gen: beginning, origin

  • -physis: growth

  • -tropic: stimulate

  • -tropin: that which stimulates

  • -uria: urine, urination

Additional Hormonal Terms

  • Adrenaline: A hormone produced by the adrenal glands in response to stress.

  • Cortisone: A corticosteroid hormone used medicinally for its anti-inflammatory effects.

  • Estrogen: A group of hormones that play a key role in the development of female physical features and reproductive processes.

  • Growth Hormone: A hormone important for physical growth and development.

  • Thyroxine: A hormone produced by the thyroid gland that regulates metabolism.

  • Euthyroid: A state in which the thyroid gland is functioning normally.

Quick Quiz

  • Testosterone: An androgen.

Anatomy of the Thyroid Gland

  • Important to understand the palpation and evaluation of the thyroid gland using medical references for assessment techniques.

Diabetes Terms

  • Diabetes Insipidus: Characterized by insufficient antidiuretic hormone (ADH) or poor response to ADH, leading to excess urine production (polyuria) and extreme thirst (polydipsia).

  • Diabetes Mellitus (Types 1 and 2): Involves insufficient or improper use of insulin, leading to elevated blood glucose levels (hyperglycemia) and presence of glucose in the urine (glycosuria).

Growth Disorders

  • Acromegaly: A disorder resulting from excess growth hormone, leading to abnormal growth in adulthood, particularly of the hands, feet, and face.

  • Cretinism: A condition arising from hypothyroidism in infancy or childhood, characterized by delayed physical and mental development.

  • Growth Hormone Deficiency: A deficiency resulting in inadequate growth hormone production.

  • Gigantism and Dwarfism: Conditions characterized by excessive growth due to hormonal imbalance (gigantism) or insufficient growth (dwarfism).

Surgical and Therapeutic Interventions for Endocrine Disorders

  • Hypopituitarism Treatments

    • May involve hormone replacement and management of endocrine deficiencies.

  • Antithyroid Drugs: Used to treat conditions like hyperthyroidism by inhibiting thyroid hormone production.

  • Adenectomy: Surgical removal of an adenoma (tumor of glandular tissue).

  • Thyroidectomy: Surgical removal of the thyroid gland.

  • Glucose-Lowering Agents: Medications used to manage diabetes and reduce blood sugar levels.

  • Hypophysectomy: A surgical procedure to remove the pituitary gland, often used in treatment for various hormonal disorders.

Technology in Diabetes Management

  • Example of External Insulin Pump: A device used by diabetic patients to deliver insulin as needed.

    • Current Glucose Level Example: 108 mg/dL.

Quick Quiz for Cretinism

  • Characterized by:

    • Abnormally small stature

    • Abnormally large stature

    • Abnormal enlargement of the extremities

    • Arrested mental and physical development

Acronyms and Abbreviations

  • ADH: Antidiuretic Hormone

  • DM: Diabetes Mellitus