The Endocrine System and Vitamin D
30 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which type of cells in the parathyroid gland produce PTH?

  • Chief cells (correct)
  • Oxyphil cells
  • Both chief and oxyphil cells
  • None of the above
  • What is the function of oxyphil cells in the parathyroid gland?

  • Produce oxydative and hydrolitic enzymes
  • Unknown function (correct)
  • Produce insulin
  • Produce PTH
  • What is the half-life of PTH?

  • 24 hours
  • 1 hour
  • 30 minutes
  • 5-10 minutes (correct)
  • Which hormone is involved in the regulation of calcium levels in the blood?

    <p>All of the above</p> Signup and view all the answers

    What is the main function of osteoclasts?

    <p>Degrade bone tissue</p> Signup and view all the answers

    What is the direct effect of PTH on the kidneys?

    <p>Both A and B</p> Signup and view all the answers

    Which organ is responsible for transforming vitamin D into its biologically activated form?

    <p>Kidneys</p> Signup and view all the answers

    What is the most important pool for physiological control of calcium concentrations in the blood?

    <p>Bones</p> Signup and view all the answers

    What is the main function of calcitriol?

    <p>Increases absorption of calcium by the GI tract</p> Signup and view all the answers

    Which enzyme converts calcidiol 25(OH)D into calcitriol 1,25(OH)₂D?

    <p>1-alfa-hydroxilase</p> Signup and view all the answers

    Which hormone stimulates the active transport of dietary calcium across the intestinal epithelium?

    <p>PTH</p> Signup and view all the answers

    Which gland produces calcitonin?

    <p>Thyroid gland</p> Signup and view all the answers

    What is the main effect of calcitonin on bone metabolism?

    <p>Increases storage of calcium in the bones</p> Signup and view all the answers

    What is the main symptom of primary hyperparathyroidism?

    <p>Polydipsia and polyuria</p> Signup and view all the answers

    Which of the following is true about the parathyroid glands?

    <p>The parathyroid glands are located in the thyroid glands.</p> Signup and view all the answers

    What is the role of PTH (parathyroid hormone) in calcium metabolism?

    <p>PTH promotes the activation of calcitriol.</p> Signup and view all the answers

    What is the function of calcitonin in calcium and phosphate homeostasis?

    <p>Calcitonin inhibits the release of PTH from the parathyroid glands.</p> Signup and view all the answers

    Which of the following is a symptom of hyperparathyroidism?

    <p>Bone loss</p> Signup and view all the answers

    What is the abbreviation for ionized calcium?

    <p>iCa</p> Signup and view all the answers

    Which type of cells are responsible for the synthesis and secretion of PTH?

    <p>Parathyroid chief cells</p> Signup and view all the answers

    What is the function of osteocytes in bone?

    <p>Bone cell communication</p> Signup and view all the answers

    Which of the following is a symptom of nutritional secondary hyperparathyroidism in horses?

    <p>Muscle weakness</p> Signup and view all the answers

    What is the most common cause of idiopathic secondary hyperparathyroidism?

    <p>Unknown</p> Signup and view all the answers

    What are the classic laboratory findings in horses with hypocalcemia due to low levels of PTH?

    <p>Low total calcium and high ionized calcium</p> Signup and view all the answers

    What is the primary cause of nutritional secondary hyperparathyroidism in reptiles and amphibians?

    <p>Deficiency of dietary calcium</p> Signup and view all the answers

    What is the condition known as 'big-head disease' in horses?

    <p>Nutritional secondary hyperparathyroidism</p> Signup and view all the answers

    What is the main factor implicated in the development of nutritional secondary hyperparathyroidism in reptiles and amphibians?

    <p>Imbalance of calcium-phosphorus ratio</p> Signup and view all the answers

    What is the main cause of skeletal deformities and bone effects in patients with secondary hyperparathyroidism?

    <p>Excessive mobilization of calcium from the skeleton</p> Signup and view all the answers

    What are the classic laboratory findings in horses with secondary hyperparathyroidism?

    <p>Low total and ionized calcium</p> Signup and view all the answers

    What is the role of parathyroid hormone in the development of nutritional secondary hyperparathyroidism?

    <p>Excessive production of PTH</p> Signup and view all the answers

    More Like This

    The Endocrine System
    5 questions

    The Endocrine System

    ConsiderateLogic avatar
    ConsiderateLogic
    The Endocrine System Overview
    8 questions

    The Endocrine System Overview

    UserFriendlyLapSteelGuitar9305 avatar
    UserFriendlyLapSteelGuitar9305
    Use Quizgecko on...
    Browser
    Browser