Question 1

Which property of water allows it to absorb and release large amounts of heat with only a slight change in its own temperature, helping to maintain homeostasis in the human body?

Accepted Answer

High heat capacity

Question 2

What is the main reason water is considered the 'universal solvent' in biological systems?

Accepted Answer

It is highly polar, allowing it to dissolve many substances

Question 3

Which of the following best describes a hydrolysis reaction?

Accepted Answer

Water is added to break a bond in a molecule

Question 4

Refer to the first image provided. What process is illustrated by the separation of green and yellow spheres into individual ions in water?

Accepted Answer

Dissociation of salt in water

Question 5

Which equation correctly represents the neutralization reaction between hydrochloric acid and sodium hydroxide?

Accepted Answer

$$\mathrm{HCl} + \mathrm{NaOH} \rightarrow \mathrm{NaCl} + \mathrm{H_2O}$$

Question 6

Which of the following is NOT a vital property of water in the human body?

Accepted Answer

Electrolyte conduction

Question 7

What is the function of salts in the body, such as sodium and potassium ions?

Accepted Answer

They are essential for nerve impulse transmission

Question 8

Which statement about acids is correct?

Accepted Answer

Strong acids ionize completely and release all their protons

Question 9

A solution contains a salt that dissociates into ions in water. What property does this solution exhibit?

Accepted Answer

It conducts electrical currents

Question 10

Which of the following best explains why water is important for cushioning organs such as the brain and fetus?

Accepted Answer

Water’s incompressibility and fluid nature absorb shock

Question 11

Which of the following equations represents the dissociation of hydrochloric acid in water?

Accepted Answer

$$\mathrm{HCl} \rightarrow \mathrm{H^+} + \mathrm{Cl^-}$$

Question 12

Which property of water is most responsible for its ability to dissolve ionic compounds such as NaCl?

Accepted Answer

Polarity

Question 13

A patient is experiencing rapid changes in body temperature. Which property of water is most likely compromised?

Accepted Answer

High heat capacity

Question 14

Which of the following is a correct statement about bases?

Accepted Answer

Strong bases take up all available H+ ions in solution

Question 15

Which of the following best describes the difference between cohesion and adhesion?

Accepted Answer

Cohesion is the attraction of water molecules to each other; adhesion is the attraction of water molecules to other substances

Question 16

Which of the following ions is most abundant in the extracellular fluid (ECF)?

Accepted Answer

Sodium

Question 17

A solution with a pH of 5 contains which of the following in excess?

Accepted Answer

Hydrogen ions (H+)

Question 18

Which of the following best describes the process shown in the second image (NaCl dissociation)?

Accepted Answer

NaCl is dissociating into Na+ and Cl– ions in water

Question 19

Which of the following is a correct statement about electrolytes?

Accepted Answer

Electrolytes are ions that conduct electrical currents in solution

Question 20

Which of the following best explains why water is essential for digestion?

Accepted Answer

Water participates in hydrolysis reactions to break down biological molecules

Basic Chemistry: Inorganic Compounds in Anatomy & Physiology

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