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HESI (Entrance Exam) Questions and answers
2025
What are the most abundant elements of the human
body? - .....ANSWER ...✔✔ Carbon, Hydrogen,
Oxygen, Nitrogen
90% of the human body is composed of just four
elements which are: - .....ANSWER ...✔✔ Carbon,
Hydrogen, Oxygen, Nitrogen
The smallest unit of an element that still retains the
chemical and physical properties of the element is
called: - .....ANSWER ...✔✔ Atom
Subatomic particles are: - .....ANSWER ...✔✔ Protons
(positive), Neutrons (neutral) and Electrons (negative)
All matter is composed of basic substances called -
.....ANSWER ...✔✔ Elements
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An atom that tells you how many protons an atom has is
called: - .....ANSWER ...✔✔ Atomic Number
The number of protons and neutrons is called: -
.....ANSWER ...✔✔ Mass Number
What is isotope? - .....ANSWER ...✔✔ 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? - .....ANSWER ...✔✔
Atom whose nucleus undergoes degeneration and in the
process gives off radiation
What is a molecule? - .....ANSWER ...✔✔ Atoms
bonded together to form a chemical unit
What is a compound? - .....ANSWER ...✔✔ Combining
different atoms
What is ionic bond? - .....ANSWER ...✔✔ Ions with
opposite charges attract
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What are ions? - .....ANSWER ...✔✔ Particle that is
electrically charged because it has gained or lost one or
more eletrons
What is a covalent bonds? - .....ANSWER ...✔✔ Atoms
sharing electrons instead of losing or gain them
What is polar bond? - .....ANSWER ...✔✔ Bond
created when electrons shared by adjacent atoms are
shared unequally
hydrophilic means - .....ANSWER ...✔✔ water-living
Hydrophobic means - .....ANSWER ...✔✔ water-
fearing
What is electrolyte? - .....ANSWER ...✔✔ Substances
that release ions when puts into water
What is pH? - .....ANSWER ...✔✔ a measure of
hydrogen ion concentration
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Anterior position - .....ANSWER ...✔✔ a body part is
located towards the front (ventral)
Posterior position - .....ANSWER ...✔✔ a body part is
located toward the back. (dorsal)
Superior position - .....ANSWER ...✔✔ a body part is
located ABOVE another part or towards the head
Anatomy - .....ANSWER ...✔✔ structure as well as its
relationship with other structure
Physiology - .....ANSWER ...✔✔ function of the body
Proximal - .....ANSWER ...✔✔ a body part is CLOSER
to a specific point of origin or attachment or closer to
the trunk of the body
Distal - .....ANSWER ...✔✔ a body part is FARTHER
from the specific point of the origin or attachment
Superficial -external - .....ANSWER ...✔✔ a body
part is located near the surface
HESI (Entrance Exam) Questions and answers
2025
What are the most abundant elements of the human
body? - .....ANSWER ...✔✔ Carbon, Hydrogen,
Oxygen, Nitrogen
90% of the human body is composed of just four
elements which are: - .....ANSWER ...✔✔ Carbon,
Hydrogen, Oxygen, Nitrogen
The smallest unit of an element that still retains the
chemical and physical properties of the element is
called: - .....ANSWER ...✔✔ Atom
Subatomic particles are: - .....ANSWER ...✔✔ Protons
(positive), Neutrons (neutral) and Electrons (negative)
All matter is composed of basic substances called -
.....ANSWER ...✔✔ Elements
,2|Page
An atom that tells you how many protons an atom has is
called: - .....ANSWER ...✔✔ Atomic Number
The number of protons and neutrons is called: -
.....ANSWER ...✔✔ Mass Number
What is isotope? - .....ANSWER ...✔✔ 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? - .....ANSWER ...✔✔
Atom whose nucleus undergoes degeneration and in the
process gives off radiation
What is a molecule? - .....ANSWER ...✔✔ Atoms
bonded together to form a chemical unit
What is a compound? - .....ANSWER ...✔✔ Combining
different atoms
What is ionic bond? - .....ANSWER ...✔✔ Ions with
opposite charges attract
,3|Page
What are ions? - .....ANSWER ...✔✔ Particle that is
electrically charged because it has gained or lost one or
more eletrons
What is a covalent bonds? - .....ANSWER ...✔✔ Atoms
sharing electrons instead of losing or gain them
What is polar bond? - .....ANSWER ...✔✔ Bond
created when electrons shared by adjacent atoms are
shared unequally
hydrophilic means - .....ANSWER ...✔✔ water-living
Hydrophobic means - .....ANSWER ...✔✔ water-
fearing
What is electrolyte? - .....ANSWER ...✔✔ Substances
that release ions when puts into water
What is pH? - .....ANSWER ...✔✔ a measure of
hydrogen ion concentration
, 4|Page
Anterior position - .....ANSWER ...✔✔ a body part is
located towards the front (ventral)
Posterior position - .....ANSWER ...✔✔ a body part is
located toward the back. (dorsal)
Superior position - .....ANSWER ...✔✔ a body part is
located ABOVE another part or towards the head
Anatomy - .....ANSWER ...✔✔ structure as well as its
relationship with other structure
Physiology - .....ANSWER ...✔✔ function of the body
Proximal - .....ANSWER ...✔✔ a body part is CLOSER
to a specific point of origin or attachment or closer to
the trunk of the body
Distal - .....ANSWER ...✔✔ a body part is FARTHER
from the specific point of the origin or attachment
Superficial -external - .....ANSWER ...✔✔ a body
part is located near the surface
