Human Cell Biology

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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?

Basic characteristics that are alike Signup and view all the answers

What percentage of the adult human body is fluid?

60 per cent Signup and view all the answers

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

To hold different cells together Signup and view all the answers

What is the main function of the extracellular fluid?

To provide ions and nutrients to the cells Signup and view all the answers

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

25 trillion Signup and view all the answers

What happens when cells of a particular type are destroyed?

The remaining cells of that type generate new cells Signup and view all the answers

Why is the extracellular fluid also called the internal environment?

Because it surrounds all cells with the same conditions Signup and view all the answers

Who introduced the term 'milieu intérieur'?

Claude Bernard Signup and view all the answers

How is the extracellular fluid transported throughout the body?

Through the circulatory system Signup and view all the answers

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

Proper concentrations of oxygen, glucose, and other constituents Signup and view all the answers

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

Carbon dioxide Signup and view all the answers

What is a key difference between extracellular and intracellular fluids?

Presence of sodium and chloride ions in extracellular fluid Signup and view all the answers

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

To understand the functions of organs and other structures Signup and view all the answers

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

To maintain ion concentration differences between extracellular and intracellular fluids Signup and view all the answers

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

Months or many years Signup and view all the answers