APHY 201 Ch 1, 2: Homeostasis, Chemistry Ivy Tech Exam Questions with
Correct Answers
Question 1:
explain why chemistry is an important part of the study of physiology
Answer:
....all the cells in your organs are
composed of chemicals and chemical reactions are involved in all of your body's movements
and cycles
Question 2:
matter
Answer:
....Anything that occupies space and has mass; the physical material of the universe
Question 3:
element
Answer:
....a pure substance that cannot be created or broken down by ordinary chemical means
Question 4:
most abundant elements in humans
Answer:
....oxygen (O), carbon (C), hydrogen (H), nitrogen (N)
Question 5:
compound
Answer:
....substance composed of two or more elements joined by chemical bonds
Question 6:
proton
Answer:
....A subatomic particle that has a positive charge and that is found in the nucleus of an atom
,Question 7:
neutron
Answer:
....A subatomic particle that has no charge and that is found in the nucleus of an atom
Question 8:
electron
Answer:
....A subatomic particle that has a negative charge and found outside the nucleus
Question 9:
nucleus
Answer:
....center of an atom, contains protons and neutrons
Question 10:
atomic number
Answer:
....the number of protons in the nucleus of an atom, which determines the chemical properties
of an element and its place in the periodic table
Question 11:
valence electrons
Answer:
....The electrons in the outermost shell (main energy level) of an atom; these are the electrons
involved in forming bonds.
Question 12:
bond
Answer:
....a weak or strong electrical attraction that holds atoms in the same vicinity
Question 13:
molecule
Answer:
....atoms bonded together
, Question 14:
ionic bond
Answer:
....Formed when one or more electrons are transferred from one atom to another
Question 15:
cation
Answer:
....A positively charged ion
Question 16:
anion
Answer:
....A negatively charged ion
Question 17:
covalent bond
Answer:
....A chemical bond that involves sharing a pair of electrons between atoms in a molecule
Question 18:
polar covalent bond
Answer:
....A covalent bond in which electrons are not shared equally
Question 19:
nonpolar covalent bond
Answer:
....a covalent bond in which the electrons are shared equally by the two atoms
Question 20:
hydrogen bonds
Answer:
....Very weak bonds; occurs when a hydrogen atom in one molecule is attracted to the
electrostatic atom in another molecule
Correct Answers
Question 1:
explain why chemistry is an important part of the study of physiology
Answer:
....all the cells in your organs are
composed of chemicals and chemical reactions are involved in all of your body's movements
and cycles
Question 2:
matter
Answer:
....Anything that occupies space and has mass; the physical material of the universe
Question 3:
element
Answer:
....a pure substance that cannot be created or broken down by ordinary chemical means
Question 4:
most abundant elements in humans
Answer:
....oxygen (O), carbon (C), hydrogen (H), nitrogen (N)
Question 5:
compound
Answer:
....substance composed of two or more elements joined by chemical bonds
Question 6:
proton
Answer:
....A subatomic particle that has a positive charge and that is found in the nucleus of an atom
,Question 7:
neutron
Answer:
....A subatomic particle that has no charge and that is found in the nucleus of an atom
Question 8:
electron
Answer:
....A subatomic particle that has a negative charge and found outside the nucleus
Question 9:
nucleus
Answer:
....center of an atom, contains protons and neutrons
Question 10:
atomic number
Answer:
....the number of protons in the nucleus of an atom, which determines the chemical properties
of an element and its place in the periodic table
Question 11:
valence electrons
Answer:
....The electrons in the outermost shell (main energy level) of an atom; these are the electrons
involved in forming bonds.
Question 12:
bond
Answer:
....a weak or strong electrical attraction that holds atoms in the same vicinity
Question 13:
molecule
Answer:
....atoms bonded together
, Question 14:
ionic bond
Answer:
....Formed when one or more electrons are transferred from one atom to another
Question 15:
cation
Answer:
....A positively charged ion
Question 16:
anion
Answer:
....A negatively charged ion
Question 17:
covalent bond
Answer:
....A chemical bond that involves sharing a pair of electrons between atoms in a molecule
Question 18:
polar covalent bond
Answer:
....A covalent bond in which electrons are not shared equally
Question 19:
nonpolar covalent bond
Answer:
....a covalent bond in which the electrons are shared equally by the two atoms
Question 20:
hydrogen bonds
Answer:
....Very weak bonds; occurs when a hydrogen atom in one molecule is attracted to the
electrostatic atom in another molecule
