Anatomy and Physiology: Alimentary Tract Functions
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Questions and Answers

What is the approximate length of individual smooth muscle fibers in the gastrointestinal tract?

  • 500-800 micrometers
  • 100-200 micrometers
  • 200-500 micrometers (correct)
  • 800-1000 micrometers

    • What is the approximate diameter of individual smooth muscle fibers in the gastrointestinal tract?

  • 1-5 micrometers
  • 10-15 micrometers
  • 2-10 micrometers (correct)
  • 15-20 micrometers

    • What allows low-resistance movement of ions from one smooth muscle cell to the next within each bundle?

  • Tight junctions
  • Desmosomes
  • Gap junctions (correct)
  • Hemidesmosomes

    • What characterizes the electrical activity of the smooth muscle in the gastrointestinal tract?

    <p>Slow waves and spikes</p> Signup and view all the answers

    How does electrical excitation of one muscle layer in the gastrointestinal tract typically affect the other?

    <p>Excitation of the other layer</p> Signup and view all the answers

    What is the approximate number of red blood cells in each person?

    <p>25 billion</p> Signup and view all the answers

    What is the main focus of the book mentioned in the text?

    <p>Studying the coordination of control systems in the human body</p> Signup and view all the answers

    What do all cells deliver into the surrounding fluids?

    <p>Products of chemical reactions</p> Signup and view all the answers

    What is the main role of microbiota in the human body?

    <p>Living in harmony with human hosts</p> Signup and view all the answers

    What is pathophysiology primarily concerned with?

    <p>Disordered body function</p> Signup and view all the answers

    What is the main focus of physiology?

    <p>Understanding the physical and chemical mechanisms responsible for the origin and development of life</p> Signup and view all the answers

    Why do humans seek food when hungry and refuge when afraid?

    <p>Due to automatic life sequence</p> Signup and view all the answers

    How does human physiology contribute to medicine?

    <p>By integrating multiple functions of cells, tissues, and organs into the functions of the living human being</p> Signup and view all the answers

    What allows humans to exist under widely varying conditions?

    <p>Sensing, feeling, and knowledgeable beings</p> Signup and view all the answers

    Why does the science of physiology have numerous subdivisions?

    <p>Each type of life has its own functional characteristics</p> Signup and view all the answers

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