HESI Entrance Exam Vocabulary
Study Guide | A2 Word List,
Definitions and Practice
Questions | Graded A+
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive Rationales
Included
,What are the most abundant elements of the human body? Carbon, Hydrogen, Oxygen, Nitrogen
90% of the human body is composed of just four elements Carbon, Hydrogen, Oxygen, Nitrogen
which are:
The smallest unit of an element that still retains the Atom
chemical and physical properties of the element is called:
Subatomic particles are: Protons (positive), Neutrons (neutral) and Electrons (negative)
All matter is composed of basic substances called Elements
An atom that tells you how many protons an atom has is Atomic Number
called:
The number of protons and neutrons is called: Mass Number
What is isotope? The same element but different number in protons and neutrons-Mass Number
(protons plus neutrons) minus Atomic Number (number of protons) equals the
number of neutrons.
What is radioactive isotope? Atom whose nucleus undergoes degeneration and in the process gives off radiation
What is a molecule? Atoms bonded together to form a chemical unit
What is a compound? Combining different atoms
What is ionic bond? Ions with opposite charges attract
What are ions? Particle that is electrically charged because it has gained or lost one or more
eletrons
What is a covalent bonds? Atoms sharing electrons instead of losing or gain them
What is polar bond? Bond created when electrons shared by adjacent atoms are shared unequally
,hydrophilic means water-living
Hydrophobic means water-fearing
What is electrolyte? Substances that release ions when puts into water
What is pH? a measure of hydrogen ion concentration
Anterior position a body part is located towards the front (ventral)
Posterior position a body part is located toward the back. (dorsal)
Superior position a body part is located ABOVE another part or towards the head
Anatomy structure as well as its relationship with other structure
Physiology function of the body
Proximal a body part is CLOSER to a specific point of origin or attachment or closer to the
trunk of the body
Distal a body part is FARTHER from the specific point of the origin or attachment
Superficial -external a body part is located near the surface
Deep (internal) a body part is located away from the surface
A sagittal plane (median) cuts the body right down the middle
A frontal plane (coronal) is perpendicular (oppose) so it from ear to ear, from shoulder to shoulder across
cuts the body
, A transverse plane cuts the body from the navel in half dividing the superior from the inferior
A group of similar types of cells that performs a specific Tissue
function is a(n):
What is the mechanism called which brings about an positive feedback
increasing change in the same direction? Example: child
birth
The relative consistency of the body's internal environment hemostasis
is called
A group of similar types of cells that performs a specific tissue
function is a(n):
A group of two or more types of tissues is a(n): Organ
Structures found WITHIN a cell that perform specific Organelles
functions are:
Place the levels of organization in order from least atom, molecule, organelle, cell, tissue, organ, organ system, organism
complex to most complex
The mitochondrion is an example of a(an) Organelle
The nose is _______ to the chin Superior
The muscles are _____ to the skin Deep
The sternum is anterior or ______ to the heart. Ventral
What is the scientific term for the mouth Oral
Identify the plane that would divide the body into left and Sagittal
right sides
The plane that divides a body part into anterior and Frontal (coronal) plane
posterior sections is the ______ plane
Study Guide | A2 Word List,
Definitions and Practice
Questions | Graded A+
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive Rationales
Included
,What are the most abundant elements of the human body? Carbon, Hydrogen, Oxygen, Nitrogen
90% of the human body is composed of just four elements Carbon, Hydrogen, Oxygen, Nitrogen
which are:
The smallest unit of an element that still retains the Atom
chemical and physical properties of the element is called:
Subatomic particles are: Protons (positive), Neutrons (neutral) and Electrons (negative)
All matter is composed of basic substances called Elements
An atom that tells you how many protons an atom has is Atomic Number
called:
The number of protons and neutrons is called: Mass Number
What is isotope? The same element but different number in protons and neutrons-Mass Number
(protons plus neutrons) minus Atomic Number (number of protons) equals the
number of neutrons.
What is radioactive isotope? Atom whose nucleus undergoes degeneration and in the process gives off radiation
What is a molecule? Atoms bonded together to form a chemical unit
What is a compound? Combining different atoms
What is ionic bond? Ions with opposite charges attract
What are ions? Particle that is electrically charged because it has gained or lost one or more
eletrons
What is a covalent bonds? Atoms sharing electrons instead of losing or gain them
What is polar bond? Bond created when electrons shared by adjacent atoms are shared unequally
,hydrophilic means water-living
Hydrophobic means water-fearing
What is electrolyte? Substances that release ions when puts into water
What is pH? a measure of hydrogen ion concentration
Anterior position a body part is located towards the front (ventral)
Posterior position a body part is located toward the back. (dorsal)
Superior position a body part is located ABOVE another part or towards the head
Anatomy structure as well as its relationship with other structure
Physiology function of the body
Proximal a body part is CLOSER to a specific point of origin or attachment or closer to the
trunk of the body
Distal a body part is FARTHER from the specific point of the origin or attachment
Superficial -external a body part is located near the surface
Deep (internal) a body part is located away from the surface
A sagittal plane (median) cuts the body right down the middle
A frontal plane (coronal) is perpendicular (oppose) so it from ear to ear, from shoulder to shoulder across
cuts the body
, A transverse plane cuts the body from the navel in half dividing the superior from the inferior
A group of similar types of cells that performs a specific Tissue
function is a(n):
What is the mechanism called which brings about an positive feedback
increasing change in the same direction? Example: child
birth
The relative consistency of the body's internal environment hemostasis
is called
A group of similar types of cells that performs a specific tissue
function is a(n):
A group of two or more types of tissues is a(n): Organ
Structures found WITHIN a cell that perform specific Organelles
functions are:
Place the levels of organization in order from least atom, molecule, organelle, cell, tissue, organ, organ system, organism
complex to most complex
The mitochondrion is an example of a(an) Organelle
The nose is _______ to the chin Superior
The muscles are _____ to the skin Deep
The sternum is anterior or ______ to the heart. Ventral
What is the scientific term for the mouth Oral
Identify the plane that would divide the body into left and Sagittal
right sides
The plane that divides a body part into anterior and Frontal (coronal) plane
posterior sections is the ______ plane
