A&P 2457 UTA EXAM 1 ARANDA.
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Serosa (serous membrane) - ANS Thin, double-layered membranes that cover surfaces in
ventral body cavity
Parietal Serosa - ANS Lines internal body cavity walls
Visceral Serosa - ANS Covers internal organs
Kinetic Energy - ANS Energy in motion
Potential Energy - ANS Stored Energy
What four elements make up 96% of the human body? - ANS Carbon, Hydrogen, Oxygen, and
Nitrogen
Atoms - ANS Unique building blocks for each element, smallest particles of an element with
properties of that element
@2026 ALLRIGHTS RESERVED 1
,Planetary Model - ANS Simplified and outdated because it incorrectly depicts electrons in
orbits, fixed circular paths
Orbital Model - ANS Current model used that depicts orbitals, probable regions where an
electron is most likely to be located (rather than fixed orbits)
Atomic Number - ANS The number of protons in the nucleus of an atom
Mass Number - ANS The total number of protons and neutrons in the nucleus of an atom
Isotopes - ANS Atoms with the same number of protons but differ in the number of neutrons
they contain (structural variations of same element)
Atomic Weight - ANS Average of the mass numbers of all isotope forms of an atom
Radioisotopes - ANS An isotope that has an unstable nucleus and undergoes radioactive
decay
Molecule - ANS General term for 2 or more atoms bonded together
Compound - ANS Specific molecule that has 2 or more different kinds of atoms bonded
together
Three basic types of mixtures - ANS Solutions, Colloids, and Suspensions
Solutions - ANS A homogenous mixture where substances are distributed evenly. Has a
solvent & solute.
@2026 ALLRIGHTS RESERVED 2
, Solvent - ANS A liquid substance capable of dissolving other substances (substance present in
greatest amount)
Solute - ANS A substance that is dissolved in a solvent (present in smaller amounts)
Colloids - ANS Emulsions are heterogeneous mixtures, meaning that particles are not evenly
distributed throughout mixture (Jello)
Suspensions - ANS Heterogeneous mixtures with large, often visible solutes that tend to
settle out (blood)
Differences Between Mixtures and Compounds - ANS 1. Unlike compounds, mixtures do not
involve chemical bonding between components
2. Mixtures can be separated by physical means, such as straining and filtering; compounds can
be separated only by breaking their chemical bonds
3. Mixtures can be heterogeneous or homogeneous; compounds are only homogeneous
Chemical Bonds - ANS "Energy Relationships" between electrons of reacting atoms
Three Major Types of Chemical Bonds - ANS Ionic bonds, covalent bonds, hydrogen bonds
Ionic Bonds - ANS Ions are atoms that have gained or lost electrons and become charged
Anion - ANS A negatively charged ion (gained electrons)
@2026 ALLRIGHTS RESERVED 3
QUESTIONS AND ANSWERS 100% PASS
2026/2027
Serosa (serous membrane) - ANS Thin, double-layered membranes that cover surfaces in
ventral body cavity
Parietal Serosa - ANS Lines internal body cavity walls
Visceral Serosa - ANS Covers internal organs
Kinetic Energy - ANS Energy in motion
Potential Energy - ANS Stored Energy
What four elements make up 96% of the human body? - ANS Carbon, Hydrogen, Oxygen, and
Nitrogen
Atoms - ANS Unique building blocks for each element, smallest particles of an element with
properties of that element
@2026 ALLRIGHTS RESERVED 1
,Planetary Model - ANS Simplified and outdated because it incorrectly depicts electrons in
orbits, fixed circular paths
Orbital Model - ANS Current model used that depicts orbitals, probable regions where an
electron is most likely to be located (rather than fixed orbits)
Atomic Number - ANS The number of protons in the nucleus of an atom
Mass Number - ANS The total number of protons and neutrons in the nucleus of an atom
Isotopes - ANS Atoms with the same number of protons but differ in the number of neutrons
they contain (structural variations of same element)
Atomic Weight - ANS Average of the mass numbers of all isotope forms of an atom
Radioisotopes - ANS An isotope that has an unstable nucleus and undergoes radioactive
decay
Molecule - ANS General term for 2 or more atoms bonded together
Compound - ANS Specific molecule that has 2 or more different kinds of atoms bonded
together
Three basic types of mixtures - ANS Solutions, Colloids, and Suspensions
Solutions - ANS A homogenous mixture where substances are distributed evenly. Has a
solvent & solute.
@2026 ALLRIGHTS RESERVED 2
, Solvent - ANS A liquid substance capable of dissolving other substances (substance present in
greatest amount)
Solute - ANS A substance that is dissolved in a solvent (present in smaller amounts)
Colloids - ANS Emulsions are heterogeneous mixtures, meaning that particles are not evenly
distributed throughout mixture (Jello)
Suspensions - ANS Heterogeneous mixtures with large, often visible solutes that tend to
settle out (blood)
Differences Between Mixtures and Compounds - ANS 1. Unlike compounds, mixtures do not
involve chemical bonding between components
2. Mixtures can be separated by physical means, such as straining and filtering; compounds can
be separated only by breaking their chemical bonds
3. Mixtures can be heterogeneous or homogeneous; compounds are only homogeneous
Chemical Bonds - ANS "Energy Relationships" between electrons of reacting atoms
Three Major Types of Chemical Bonds - ANS Ionic bonds, covalent bonds, hydrogen bonds
Ionic Bonds - ANS Ions are atoms that have gained or lost electrons and become charged
Anion - ANS A negatively charged ion (gained electrons)
@2026 ALLRIGHTS RESERVED 3
