Question 1

Which of the following best explains why your weight changes on the Moon but your mass remains the same?

Accepted Answer

Weight depends on gravity, while mass is the amount of matter and does not change with location.

Question 2

A patient has a blood plasma volume of 3 liters. If blood plasma is considered a liquid, which property does it exhibit?

Accepted Answer

It has a definite volume but conforms to the shape of its container.

Question 3

Which of the following is NOT a form of energy found in the human body?

Accepted Answer

Gravitational energy

Question 4

During muscle contraction, which energy conversion occurs?

Accepted Answer

Chemical energy is converted to mechanical energy.

Question 5

Which equation correctly relates weight ($$W$$), mass ($$m$$), and gravitational acceleration ($$g$$)?

Accepted Answer

$$W = m 	imes g$$

Question 6

Which statement about atoms and elements is correct?

Accepted Answer

Elements are made up of atoms, which are the building blocks giving each element its properties.

Question 7

A sodium atom donates an electron to a chlorine atom. What type of bond is formed and what are the resulting charges?

Accepted Answer

An ionic bond; sodium becomes a cation (+), chlorine becomes an anion (-).

Question 8

Which of the following best describes a polar covalent bond?

Accepted Answer

Electrons are shared unequally, resulting in partial positive and negative charges.

Question 9

Which molecule is an example of a nonpolar covalent bond?

Accepted Answer

Carbon dioxide ($$CO_2)$$

Question 10

What is the atomic number of an element defined by?

Accepted Answer

The number of protons in the nucleus

Question 11

Which of the following best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve 8 electrons in their valence shell.

Question 12

Which type of chemical bond is the strongest?

Accepted Answer

Covalent bond

Question 13

A molecule of water ($$H_2O) is $$described as having a V-shape and two poles of charge. What type of bond is present between the hydrogen and oxygen atoms?

Accepted Answer

Polar covalent bond

Question 14

Which of the following is true about isotopes?

Accepted Answer

Isotopes of an element have the same number of protons but different numbers of neutrons.

Question 15

Which of the following is a real-life example of mechanical energy in the human body?

Accepted Answer

Movement of muscles during walking

Question 16

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom carrying a partial positive charge and an electronegative atom with a partial negative charge.

Question 17

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic number and mass number?

Accepted Answer

Atomic number: 6, Mass number: 12

Question 18

Which of the following is a consequence of energy conversion in the human body?

Accepted Answer

Some energy is lost as heat, helping regulate body temperature.

Question 19

Which of the following best describes the difference between molecules and compounds?

Accepted Answer

Molecules are two or more atoms combined; compounds are molecules made of different kinds of atoms.

Question 20

Which of the following is a correct example of a chemical symbol derived from a Latin name?

Accepted Answer

Potassium = K (from kalium)

Chemical Aspects of Life: Foundations for Anatomy & Physiology

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