$$M = \frac{\text{moles of solute}}{\text{liters of solution}}$$

Question 1

Which of the following best describes the difference between mass and weight in the context of human anatomy?

Accepted Answer

Mass is the amount of matter in an object, while weight is the pull of gravity on that mass.

Question 2

A patient receives an intravenous saline solution. Which type of mixture is this solution classified as?

Accepted Answer

Solution

Question 3

Which form of energy is directly involved in moving matter, such as muscle contraction?

Accepted Answer

Mechanical energy

Question 4

During cellular respiration, glucose is broken down to release energy. What type of chemical reaction is this?

Accepted Answer

Decomposition reaction

Question 5

Which of the following elements is NOT one of the four that make up 96.1% of body mass?

Accepted Answer

Calcium (Ca)

Question 6

A molecule of water (H$$_2O) is $$held together by which type of bond?

Accepted Answer

Polar covalent bond

Question 7

Which statement about energy conversion in the human body is correct?

Accepted Answer

Energy conversion is inefficient; some energy is lost as heat.

Question 8

Which of the following best describes an isotope?

Accepted Answer

Atoms of the same element with different numbers of neutrons.

Question 9

A sodium atom (Na) loses one electron to become Na$$^+. $$What type of particle is Na$$^+$$?

Accepted Answer

Cation

Question 10

Which equation correctly represents the molarity ($$M) of a $$solution?

Accepted Answer

$$M = \frac{	ext{moles of solute}}{	ext{liters of solution}}$$

Question 11

Which of the following is a property of a suspension, such as blood?

Accepted Answer

Large, visible solutes settle out over time.

Question 12

Which of the following best explains why noble gases are chemically inert?

Accepted Answer

Their valence shell is fully occupied with electrons.

Question 13

Which type of chemical bond is formed by the transfer of electrons from one atom to another?

Accepted Answer

Ionic bond

Question 14

Which of the following is true about hydrogen bonds in biological molecules?

Accepted Answer

They help maintain the three-dimensional shape of large molecules.

Question 15

Which of the following reactions is an example of a synthesis reaction?

Accepted Answer

Amino acids joining together to form a protein molecule.

Question 16

In a redox reaction, which statement is correct?

Accepted Answer

Electron donors lose electrons and are oxidized.

Question 17

Which factor does NOT increase the rate of a chemical reaction in the human body?

Accepted Answer

Decreasing temperature

Question 18

Which of the following is true about mixtures and compounds?

Accepted Answer

Mixtures can be separated by physical means, while compounds require breaking chemical bonds.

Question 19

Which of the following best describes a colloid found in the human body?

Accepted Answer

A heterogeneous mixture with large solute particles that do not settle out, such as cytosol.

Question 20

Which equation represents Avogadro's number, the number of molecules in one mole of a substance?

Accepted Answer

$$6.02 	imes 10$$^{23}$$

Chemistry Comes Alive: Foundations for Human Anatomy & Physiology

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