Anatomy and Physiology Chapter 2

A knowledge of chemistry is necessary for understanding physiology because

• cells and organelles are made of chemicals called molecules

• chemistry explains how explosives work

• chemistry explains anatomy

• physiology deals with properties of mostly physics

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Match the following

• Atoms

• Elements

• smallest unit of matter

• Elements are composed of

• chemical bonds

• Most abundant elements in body

• anything that has weight

• Matter

• C, H, O, N

• Attractions between atoms

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Match the following

• uncharged

• Neutrons

• ions

• Contains protons, neutrons and electrons

• Nucleus

• Atoms that gain or lose electrons

• positively charged

• Electrons

• negative charge

• Proton

If atomic number = number of protons, then what is the Atomic Mass

• protons + electrons

• protons + neutrons

• electrons + neutrons

• positrons and electrons

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An isotope is an atom with different number of neutrons of the most common atom. What is an unstable isotope?

• a nuclear reaction

• an atom that will split into two halves

• radioactive and emitting radiation

• an ion

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There 20 major elements in the body and atoms that make up less than 0.1% of all atoms in the body are called

• useless atoms

• invisible atoms

• minor elements

• trace elements

Oppositely charged ions attract each other and form this bond

• ionic bonds

• covalent bonds

• solid bonds

• gaseous bonds

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When atoms share electrons, in order to fill their outermost shells and become stable they create this bond

• James bond

• Covalent bond

• Hydrogen bond

• Electrolytic bond

This image is showing that water is a

• triple atom

• big molecule

• polar molecule

• ionic bonded molecule

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This image is showing (choose best answer)

• hydrogen bonds

• many water molecules

• formation of ice

• water vapor

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