Physioex: Endocrine System Lab Quiz Part 1 (Metabolism)

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Lildrammaqueen
L
Lildrammaqueen
Community Contributor
Quizzes Created: 3 | Total Attempts: 4,407
Questions: 13 | Attempts: 1,291

SettingsSettingsSettings
Endocrine System Quizzes & Trivia

Questions from the pre-lab quiz, post-lab quiz, and possibly more from the section.


Questions and Answers
  • 1. 

    Thyroid-stimulating hormone (TSH) is

    • A.

      Produced in the pituitary gland.

    • B.

      Carried through the blood to its target tissue, the hypothalamus.

    • C.

      The primary regulator of thyrotropin secretion.

    • D.

      Secreted by the posterior pituitary.

    Correct Answer
    A. Produced in the pituitary gland.
    Explanation
    Thyroid-stimulating hormone (TSH) is produced in the pituitary gland. This hormone is responsible for regulating the production and release of thyroid hormones from the thyroid gland. The pituitary gland, located at the base of the brain, produces and releases TSH in response to signals from the hypothalamus. TSH then travels through the blood to the thyroid gland, where it stimulates the production of thyroid hormones. Therefore, the correct answer is that TSH is produced in the pituitary gland.

    Rate this question:

  • 2. 

    An injection of TSH to an otherwise normal animal will cause which of the following?

    • A.

      Hypothyroidism

    • B.

      Goiter development

    • C.

      Decreased levels of T4 secretion

    • D.

      Increased levels of TRH secretion

    Correct Answer
    B. Goiter development
    Explanation
    An injection of TSH to an otherwise normal animal will cause goiter development. TSH, or thyroid-stimulating hormone, is released by the pituitary gland and stimulates the thyroid gland to produce thyroid hormones, including T4. When TSH is injected into an animal, it can cause the thyroid gland to become overactive and produce excessive amounts of thyroid hormones. This can lead to the enlargement of the thyroid gland, known as a goiter. Therefore, the correct answer is goiter development.

    Rate this question:

  • 3. 

    Thyroxine is

    • A.

      Secreted by the thyrotropin gland, located in the neck.

    • B.

      Controlled by T4 secreted from the hypophysis.

    • C.

      Also known as triiodothyromine.

    • D.

      The most important hormone for maintaining the metabolic rate and body temperature.

    Correct Answer
    D. The most important hormone for maintaining the metabolic rate and body temperature.
    Explanation
    Thyroxine is the most important hormone for maintaining the metabolic rate and body temperature. It plays a crucial role in regulating the body's energy production, metabolism, and heat generation. It helps to control the rate at which cells convert nutrients into energy, thus affecting overall metabolic activity. Additionally, thyroxine helps to regulate body temperature by influencing the body's heat production and dissipation mechanisms.

    Rate this question:

  • 4. 

    Thyrotropin-releasing  hormone (TRH) is

    • A.

      The stimulator of T4 production in the pituitary gland.

    • B.

      Produced in the pituitary gland.

    • C.

      Held at a low plasma concentration by low levels of TSH.

    • D.

      Secreted by the hypothalamus.

    Correct Answer
    D. Secreted by the hypothalamus.
    Explanation
    Thyrotropin-releasing hormone (TRH) is a hormone that is secreted by the hypothalamus. It acts as a stimulator for the production of T4 (thyroxine) in the pituitary gland. TRH is not produced in the pituitary gland itself, nor is it held at a low plasma concentration by low levels of TSH (thyroid-stimulating hormone). Therefore, the correct answer is that TRH is secreted by the hypothalamus.

    Rate this question:

  • 5. 

    Which of the following statements is true?

    • A.

      The hypothalamus primarily secrets tropic hormones that stimulate the secretion of other hormones.

    • B.

      When plasma levels of thyroxine are low, the hypothalamus will secrete TSH and stimulate the pituitary gland to secrete more TRH.

    • C.

      TRH travels from the hypothalamus to the thyroid gland via the hypothalamic-thyroid portal system.

    • D.

      Both TRH and TSH are tropical fruit drinks.

    Correct Answer
    A. The hypothalamus primarily secrets tropic hormones that stimulate the secretion of other hormones.
    Explanation
    The correct answer is that the hypothalamus primarily secretes tropic hormones that stimulate the secretion of other hormones. This means that the hypothalamus produces hormones that act on the pituitary gland, which then releases hormones that act on other endocrine glands in the body. This is an important regulatory mechanism in the endocrine system, as it allows for the control and coordination of hormone secretion throughout the body.

    Rate this question:

  • 6. 

    Which of the following statements about metabolism is false?

    • A.

      Catabolism refers to chemical reactions that break down large, complex molecules into smaller molecules.

    • B.

      Energy released in metabolism can be in the form of heat.

    • C.

      All of the energy from metabolism is ultimately stored in the chemical bonds of ATP.

    • D.

      Anabolism refers to chemical reactions that build larger, more complex molecules.

    Correct Answer
    C. All of the energy from metabolism is ultimately stored in the chemical bonds of ATP.
    Explanation
    The correct answer is "All of the energy from metabolism is ultimately stored in the chemical bonds of ATP." This statement is false because not all of the energy from metabolism is stored in ATP. Some energy is released as heat during metabolic reactions.

    Rate this question:

  • 7. 

    How would you treat a thyroidectomized animal so that it functions like a "normal" animal?

    • A.

      Provide the animal T4 supplements.

    • B.

      Provide the animal with TSH supplements.

    • C.

      Provide the animal iodine and tyrosine supplements.

    • D.

      Provide the animal with TRH supplements.

    Correct Answer
    A. Provide the animal T4 supplements.
    Explanation
    When an animal undergoes a thyroidectomy, its thyroid gland is removed, resulting in a lack of thyroid hormones such as T4. To treat this condition and help the animal function normally, T4 supplements need to be provided. T4 is the main hormone produced by the thyroid gland, and supplementing it can help restore normal thyroid function in the animal.

    Rate this question:

  • 8. 

    As a result of the missing hormone(s) in the hypophysectimized rat, what would be some expected symptoms?

    • A.

      High body temperature

    • B.

      Decreased basal metabolic rate

    • C.

      Hyperactivity

    • D.

      Unexplained weight loss

    Correct Answer
    B. Decreased basal metabolic rate
    Explanation
    The hypophysectomized rat is missing hormones that are normally produced by the pituitary gland. One of these hormones is thyroid-stimulating hormone (TSH), which stimulates the thyroid gland to produce thyroid hormones. Without TSH, the thyroid gland is not properly stimulated and therefore the basal metabolic rate (BMR) decreases. This decrease in BMR can lead to symptoms such as unexplained weight loss, as the body is not able to efficiently burn calories. The other symptoms listed, such as high body temperature and hyperactivity, are not directly related to the missing hormones in the hypophysectomized rat.

    Rate this question:

  • 9. 

    An injection of thyroxine to an otherwise normal rat will cause which of the following?

    • A.

      Hyperthyroidism

    • B.

      Development of a goiter

    • C.

      High levels of TRH secretion

    • D.

      High levels of TSH secretion

    Correct Answer
    A. Hyperthyroidism
    Explanation
    An injection of thyroxine to an otherwise normal rat will cause hyperthyroidism. Thyroxine is a hormone produced by the thyroid gland that regulates metabolism. When injected into a rat, it will increase the levels of thyroxine in the body, leading to an overactive thyroid gland and excessive production of thyroid hormones. This condition is known as hyperthyroidism, which can result in symptoms such as weight loss, increased appetite, rapid heartbeat, and nervousness.

    Rate this question:

  • 10. 

    Why didn't any of the rats develop a goiter after thyroxine injection?

    • A.

      In all cases, negative feedback mechanisms were impaired.

    • B.

      In all cases, TSH levels were not elevated by the thyroxine injection.

    • C.

      In all cases, TRH levels were increased.

    • D.

      In all cases, the thyroid gland response to TRH was lost.

    Correct Answer
    B. In all cases, TSH levels were not elevated by the thyroxine injection.
    Explanation
    The rats did not develop a goiter because their TSH levels were not elevated by the thyroxine injection. TSH, or thyroid-stimulating hormone, is responsible for stimulating the thyroid gland to produce and release thyroid hormones. In this case, since the TSH levels were not elevated, it suggests that the rats' thyroid glands were not being stimulated to produce excessive amounts of thyroid hormones, which can lead to the development of a goiter.

    Rate this question:

  • 11. 

    Why did the normal rat develop a palpable goiter with the TSH injection?

    • A.

      The TSH receptors on the thyroid gland were excessively stimulated.

    • B.

      The TSH receptors in the hypothalamus were being overstimulated.

    • C.

      The amount of T4 secretion by the thyroid gland became excessive.

    • D.

      The TSH receptors in the hypothalamus were overstimulated.

    Correct Answer
    A. The TSH receptors on the thyroid gland were excessively stimulated.
    Explanation
    The correct answer is that the TSH receptors on the thyroid gland were excessively stimulated. This is because TSH (thyroid-stimulating hormone) is responsible for stimulating the thyroid gland to produce and release thyroid hormones, including T4. When TSH is injected, it can cause an excessive stimulation of the TSH receptors on the thyroid gland, leading to increased production and secretion of thyroid hormones. This can result in the development of a palpable goiter, which is an enlargement of the thyroid gland.

    Rate this question:

  • 12. 

    An injection of propylthiouracil to an otherwise normal animal will cause which of the following?

    • A.

      hyperthyroidism

    • B.

      Excessive amounts of T4 secretion

    • C.

      Decreased levels of TSH secretion

    • D.

      Goiter development

    Correct Answer
    D. Goiter development
    Explanation
    An injection of propylthiouracil can cause goiter development. Propylthiouracil is a medication used to treat hyperthyroidism by inhibiting the production of thyroid hormones. However, in some cases, it can cause an increase in the size of the thyroid gland, leading to the development of a goiter. This is because propylthiouracil can disrupt the balance of thyroid hormones in the body, leading to an overstimulation of the thyroid gland and subsequent enlargement.

    Rate this question:

  • 13. 

    Why did the normal rat develop a palpable goiter with the propylthiouracil injection?

    • A.

      The injection decreased the negative feedback mechanism on TSH.

    • B.

      The amount of T4 secretion by the thyroid gland became excessive.

    • C.

      The secretion of TSH was inhibited by the drug.

    • D.

      The secretion of TRH was impaired by the drug.

    Correct Answer
    A. The injection decreased the negative feedback mechanism on TSH.
    Explanation
    The normal rat developed a palpable goiter with the propylthiouracil injection because the injection decreased the negative feedback mechanism on TSH. This means that the normal inhibitory signals that regulate the secretion of TSH were reduced, leading to an overproduction of TSH. As a result, the thyroid gland was stimulated to produce excessive amounts of T4, causing the development of a goiter.

    Rate this question:

Related Topics

Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.