The Parathyroid Glands Quiz
7 Questions
1 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

There are four parathyroid glands in humans.

True

The parathyroid glands are located on the anterior surface of the thyroid gland.

False

The parathormone is the most important hormone for controlling calcium balance in the blood.

True

Low blood calcium levels trigger the release of parathormone.

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

Parathormone works antagonistically to calcitonin.

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

Over secretion of parathormone is usually caused by a parathyroid gland tumor.

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

Under secretion of parathormone causes hypercalcemia.

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

Study Notes

Parathyroid Glands

  • There are four parathyroid glands in the human body, located on the thyroid gland.
  • They are small, light-colored masses on the posterior surface of the thyroid gland.

Parathormone

  • Parathormone is the single most important hormone controlling calcium balance in the blood.
  • Its release is triggered by low blood Ca2 levels and inhibited by high blood calcium levels.

Parathormone Function

  • Parathormone works antagonistically to calcitonin.
  • Over-secretion of parathormone usually results from a parathyroid gland tumor.

Effects of Over-Secretion

  • Calcium is released from bones, causing bone deformation, softening, and increased risk of fracture.
  • Blood calcium levels elevate (hypercalcemia), leading to:
    • Depression of the nervous system
    • Muscle weakness
    • Precipitation of excess calcium salts in the kidneys, leading to stone formation

Effects of Under-Secretion

  • Under-secretion of parathormone causes hypocalcemia.
  • Hypocalcemia increases the excitability of neurons.
  • It can lead to tetany, a condition where muscles remain in a contracted state.
  • If left untreated, hypocalcemia can be fatal.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

Description

Test your knowledge on the parathyroid glands and their role in calcium balance with this quiz. Learn about the location, function, and regulation of these small, light-colored masses that are crucial for maintaining blood calcium levels.

More Like This

Use Quizgecko on...
Browser
Browser