Hormone Lecture 19: Principles of Endocrine System
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Questions and Answers

What is the primary function of the endocrine system?

  • To maintain the internal environment in the body (correct)
  • To regulate body temperature
  • To transmit nerve impulses
  • To stimulate muscle contraction

How do hormones reach their target cells?

  • Through the digestive system
  • Through the nervous system
  • Through the bloodstream (correct)
  • Through the immune system

What is necessary for a cell to respond to a hormone?

  • A blood vessel
  • A nerve ending
  • A muscle fiber
  • A hormone receptor (correct)

What is the key difference between the endocrine and nervous systems?

<p>The endocrine system is anatomically discontinuous (A)</p> Signup and view all the answers

What is one of the principal functions of the endocrine system?

<p>To integrate and regulate growth and development (B)</p> Signup and view all the answers

What is the ultimate goal of the endocrine system?

<p>To maintain homeostasis (B)</p> Signup and view all the answers

What determines the concentration of hormones as seen by target cells?

<p>The rate of production, delivery, and degradation of hormones (A)</p> Signup and view all the answers

What is the function of a hormone receptor?

<p>To bind to a hormone and induce a biological response (A)</p> Signup and view all the answers

What type of hormone is growth hormone?

<p>Circadian hormone (B)</p> Signup and view all the answers

What is the term for the regulation of hormone secretion by the hypothalamus?

<p>Chronotropic control (A)</p> Signup and view all the answers

What is the role of agonists in hormone-receptor interaction?

<p>To bind to the receptor and induce a biological response (B)</p> Signup and view all the answers

What is the mechanism by which most drugs mimic hormonal action?

<p>By interacting with specific hormone receptors (D)</p> Signup and view all the answers

What is the primary function of Thyrotropin-releasing hormone (TRH)?

<p>Stimulating the release of thyroid-stimulating hormone (TSH) (C)</p> Signup and view all the answers

Which hormone is responsible for increasing milk secretion in mammary glands?

<p>Oxytocin (B)</p> Signup and view all the answers

What is the main function of Antidiuretic hormone (ADH)?

<p>Controlling water reabsorption in the kidneys (B)</p> Signup and view all the answers

What is the effect of a lack of iodine on thyroid hormones?

<p>Decreased production of thyroid hormones (B)</p> Signup and view all the answers

What is the primary mechanism of regulation of thyroid hormones?

<p>Negative feedback mechanism (A)</p> Signup and view all the answers

What is the primary site of synthesis of hormones released by the posterior pituitary?

<p>Hypothalamus (B)</p> Signup and view all the answers

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