The Body's Communication System
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Questions and Answers

Which part of the brain sends a signal to turn off the immune response?

  • Cerebellum
  • Occipital lobe
  • Hypothalamus (correct)
  • Frontal lobe

    • What type of signal molecules are hormones?

  • Amplification signals
  • Target cells
  • Inhibitory signals
  • Glucocorticoids (correct)

    • What do glucocorticoids do to white blood cells?

  • Bind to their receptors
  • Cause them to die (correct)
  • Increase their production
  • Amplify their signal production

    • What type of feedback decreases what is happening in the system?

    <p>Negative feedback</p> Signup and view all the answers

    What can happen if the body's feedback mechanisms fail?

    <p>Organ failure can occur</p> Signup and view all the answers

    Which of the following is true about communication between cells in the body?

    <p>Cells communicate through large molecules.</p> Signup and view all the answers

    What happens when a target cell receives a signal?

    <p>The target cell changes in some way or does something.</p> Signup and view all the answers

    How do signal molecules from the cells at the site of an infection affect white blood cells?

    <p>They cause the white blood cells to travel to the site of the infection.</p> Signup and view all the answers

    What is the purpose of the immune response in the body?

    <p>To start and stop the body's response to infection or injury.</p> Signup and view all the answers

    Where do immune cells and the signal molecules they send often travel through to reach target cells?

    <p>The bloodstream.</p> Signup and view all the answers

    Which cells produce and release glucocorticoids?

    <p>Adrenal gland cells</p> Signup and view all the answers

    What effect do glucocorticoids have on white blood cells?

    <p>They decrease the number of white blood cells</p> Signup and view all the answers

    What is the role of hormones in turning off the immune response?

    <p>They bind to receptors on white blood cells</p> Signup and view all the answers

    What is the function of feedback mechanisms in the body?

    <p>To regulate the body's activities and maintain homeostasis</p> Signup and view all the answers

    What can happen if the body's feedback mechanisms fail?

    <p>The body's immune response becomes hyperactive</p> Signup and view all the answers

    True or false: The immune response can be amplified by increasing the number of white blood cells.

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

    True or false: Glucocorticoids act as brakes on the immune response by decreasing the production of C-reactive protein.

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

    True or false: Positive feedback continuously increases what is happening in the system.

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

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