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

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

<p>Organ failure can occur (C)</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. (B)</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. (B)</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. (D)</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. (A)</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. (B)</p> Signup and view all the answers

Which cells produce and release glucocorticoids?

<p>Adrenal gland cells (A)</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 (C)</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 (B)</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 (C)</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 (D)</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 (A)</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 (A)</p> Signup and view all the answers

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

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

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