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

What percentage of the adult human body is fluid?

<p>60 per cent (A)</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 (B)</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 (D)</p> Signup and view all the answers

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

<p>25 trillion (C)</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 (C)</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 (A)</p> Signup and view all the answers

Who introduced the term 'milieu intérieur'?

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

How is the extracellular fluid transported throughout the body?

<p>Through the circulatory system (D)</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 (A)</p> Signup and view all the answers

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

<p>Carbon dioxide (C)</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 (B)</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 (A)</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 (A)</p> Signup and view all the answers

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

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

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