Endocrinology Hormone Functions Quiz
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Questions and Answers

Which hormone is primarily responsible for stimulating the release of thyroid-stimulating hormone (TSH)?

  • Dopamine/Prolactin Inhibiting Hormone (PIH)
  • Corticotropin-releasing hormone (CRH)
  • Thyrotropin-releasing hormone (TRH) (correct)
  • Gonadotropin-releasing hormone (GnRH)
  • Which hormone plays a role in reducing the secretion of prolactin?

  • Thyrotropin-releasing hormone (TRH)
  • Gonadotropin-releasing hormone (GnRH)
  • Dopamine/Prolactin Inhibiting Hormone (PIH) (correct)
  • Prolactin Releasing Hormone (PRH)
  • Which of the following hormones is associated with the regulation of cortisol secretion?

  • Thyrotropin-releasing hormone (TRH)
  • Prolactin Releasing Hormone (PRH)
  • Corticotropin-releasing hormone (CRH) (correct)
  • Gonadotropin-releasing hormone (GnRH)
  • Which hormone is involved in the stimulation of the release of follicle-stimulating hormone (FSH) and luteinizing hormone (LH)?

    <p>Gonadotropin-releasing hormone (GnRH)</p> Signup and view all the answers

    What is the primary function of Prolactin Releasing Hormone (PRH)?

    <p>Stimulate the release of prolactin</p> Signup and view all the answers

    Which hormone is primarily responsible for muscle mass and secondary sex characteristics in males?

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

    What role does Dehydroepiandrosterone (DHEA) primarily serve in the body?

    <p>It acts as a precursor to testosterone.</p> Signup and view all the answers

    Which statement about estrogen is correct?

    <p>It mainly originates from the ovaries.</p> Signup and view all the answers

    What is the primary source of androgens in females?

    <p>Adrenal cortex</p> Signup and view all the answers

    How does excess Dehydroepiandrosterone (DHEA) affect females during puberty?

    <p>It enhances secondary sex characteristics.</p> Signup and view all the answers

    Gonadocorticoids are also known as which of the following?

    <p>Sex hormones</p> Signup and view all the answers

    What are the main functions of the hormone aldosterone?

    <p>Increase blood pressure and promote potassium excretion.</p> Signup and view all the answers

    Which hormone is primarily related to the development of secondary sexual characteristics in females?

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

    What forms when iodine is attached to tyrosine in colloid?

    <p>DIT and MIT</p> Signup and view all the answers

    Which tissues can also contribute to the production of androgens besides the adrenal cortex and gonads?

    <p>Skin and adipose tissue</p> Signup and view all the answers

    Which molecule is composed of tyrosine and is important for thyroid hormone production?

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

    How many iodine molecules attach to a single tyrosine residue to form DIT?

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

    What is the role of the capillary in relation to colloid and tyrosine?

    <p>It provides a pathway for hormone release.</p> Signup and view all the answers

    What are the end products of iodine attachment to tyrosines that are critical for thyroid hormones?

    <p>Di-iodotyrosine and Mono-iodotyrosine</p> Signup and view all the answers

    In what form does thyroglobulin store iodinated tyrosines?

    <p>In colloid</p> Signup and view all the answers

    Which of the following describes the structure of thyroglobulin?

    <p>A large glycoprotein</p> Signup and view all the answers

    What is the primary function of T4 in the context of the information provided?

    <p>To cleave T3 from thyroglobulin</p> Signup and view all the answers

    Which of the following statements about hormones mentioned in the content is accurate?

    <p>T3 and T4 hormones are derived from thyroglobulin.</p> Signup and view all the answers

    Which process allows T3 and T4 to enter the bloodstream?

    <p>Diffusion after being cleaved from thyroglobulin</p> Signup and view all the answers

    What role do lysosomal enzymes play in the context of T4 and T3?

    <p>They cleave T4 and T3 from thyroglobulin.</p> Signup and view all the answers

    What is the relationship between thyroglobulin and the hormones T4 and T3?

    <p>T4 and T3 are synthesized from thyroglobulin.</p> Signup and view all the answers

    In which location does the cleavage of T4 and T3 from thyroglobulin primarily occur?

    <p>In the colloid of the thyroid follicle</p> Signup and view all the answers

    What is the physiological significance of T3 and T4 entering the bloodstream?

    <p>They regulate metabolic processes in the body.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of lysosomal enzymes in this context?

    <p>They promote the absorption of iodine.</p> Signup and view all the answers

    Which statement best describes the role of colloid within the thyroid follicle?

    <p>It serves exclusively as a storage area for thyroglobulin.</p> Signup and view all the answers

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