Water, functions of water, building blocks of life

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Questions and Answers

Which of the following is true about water?

  • The distribution of body water does not affect homeostasis
  • Water is not a major ingredient of body fluids and blood
  • Two-thirds of our body weight is water (correct)
  • Water is not required for the survival of living things

What is the main function of water in the body?

  • Water helps to absorb heat and regulate temperature
  • Water serves as a lubricant in the mouth
  • Water acts as a solvent for chemical reactions (correct)
  • Water is a building block of life

Which of the following is a building block of life?

  • Carbohydrates
  • Lipids
  • Proteins
  • All of the above (correct)

Which of the following is NOT a function of water in the body?

<p>Breaking down food in the mouth (D)</p> Signup and view all the answers

What percentage of water is found in the blood?

<p>91% (C)</p> Signup and view all the answers

Which of the following building blocks of life contains nitrogen?

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

Which of the following is NOT a function of water in the body?

<p>Acts as a reactant in chemical reactions (A)</p> Signup and view all the answers

Which of the following is the correct ratio of hydrogen to oxygen in carbohydrates?

<p>2:1 (C)</p> Signup and view all the answers

Which of the following is the major transport mechanism in the body?

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

Which of the following is the correct ratio of hydrogen to oxygen in carbohydrates?

<p>2:1 (B)</p> Signup and view all the answers

Which of the following is NOT a function of water in the body?

<p>Breaking down food in the mouth (A)</p> Signup and view all the answers

Which of the following building blocks of life contains nitrogen?

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

What is the main function of water in the body?

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

What percentage of water is found in the blood?

<p>91% (B)</p> Signup and view all the answers

Which of the following is NOT true about water?

<p>It is not essential for the survival of living things (A)</p> Signup and view all the answers

Which of the following is a function of water in the body?

<p>Maintaining homeostasis (C)</p> Signup and view all the answers

Which of the following is a major transport mechanism in the body?

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

Which of the following is NOT a building block of life?

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

Which of the following is true about water?

<p>It is the main component of body fluids and blood (C)</p> Signup and view all the answers

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Study Notes

Water in the Body

  • Water is a building block of life.
  • The main function of water in the body is to serve as a transport mechanism.

Composition of Water

  • The correct ratio of hydrogen to oxygen in water is 2:1.

Blood Composition

  • Approximately 83% of blood is composed of water.

Nitrogen-Containing Building Blocks

  • Nitrogen is found in some building blocks of life.

Functions of Water

  • Water helps to transport nutrients and oxygen to cells.
  • Water helps to remove waste products from cells.
  • Water is NOT a primary source of energy for the body.

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