Human Cell Biology
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Questions and Answers

What is the approximate total number of cells in the human body?

  • 100 trillion (correct)
  • 50 trillion
  • 75 trillion
  • 25 trillion
  • What is the primary function of the red blood cells in the human body?

  • To release energy for cell function
  • To transport oxygen from the lungs to the tissues (correct)
  • To perform various functions in the body
  • To support intercellular structures
  • What is the energy source for cell function in all cells?

  • Oxygen reacts with protein
  • Oxygen reacts with carbohydrate only
  • Oxygen reacts with carbohydrate, fat, and protein (correct)
  • Oxygen reacts with fat only
  • What is a common characteristic among all cells in the human body?

    <p>Basic characteristics that are alike</p> Signup and view all the answers

    What percentage of the adult human body is fluid?

    <p>60 per cent</p> Signup and view all the answers

    What is the role of intercellular supporting structures in the human body?

    <p>To hold different cells together</p> Signup and view all the answers

    What is the main function of the extracellular fluid?

    <p>To provide ions and nutrients to the cells</p> Signup and view all the answers

    How many red blood cells are present in each human being?

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

    What happens when cells of a particular type are destroyed?

    <p>The remaining cells of that type generate new cells</p> Signup and view all the answers

    Why is the extracellular fluid also called the internal environment?

    <p>Because it surrounds all cells with the same conditions</p> Signup and view all the answers

    Who introduced the term 'milieu intérieur'?

    <p>Claude Bernard</p> Signup and view all the answers

    How is the extracellular fluid transported throughout the body?

    <p>Through the circulatory system</p> Signup and view all the answers

    What is required for cells to live, grow, and perform their special functions?

    <p>Proper concentrations of oxygen, glucose, and other constituents</p> Signup and view all the answers

    What is transported from the cells to the lungs through the extracellular fluid?

    <p>Carbon dioxide</p> Signup and view all the answers

    What is a key difference between extracellular and intracellular fluids?

    <p>Presence of sodium and chloride ions in extracellular fluid</p> Signup and view all the answers

    Why is it essential to understand the basic organization of the cell?

    <p>To understand the functions of organs and other structures</p> Signup and view all the answers

    What is the purpose of special mechanisms for transporting ions through cell membranes?

    <p>To maintain ion concentration differences between extracellular and intracellular fluids</p> Signup and view all the answers

    How long can cells survive if their surrounding fluids contain appropriate nutrients?

    <p>Months or many years</p> Signup and view all the answers

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