HESI ENTRANCE EXAM QUESTIONS & ANSWERS 2026-2027 | LATEST V… EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
HESI Entrance Exam
Questions & Answers
2026-2027 | Latest
Verified Questions
(Rationales)
Verified Answers Exam Ready With Rationales
839 QUESTIONS
DOCUMENT OVERVIEW
This document contains 839 verified questions along with their correct answers and detailed
rationales, focusing on fundamental concepts in human anatomy and physiology. It serves as a
comprehensive resource for students preparing for the HESI Entrance Exam and is ideal for study,
review, and certification preparation. The inclusion of diagrams and images enhances
understanding and retention of critical information.
CONTENTS
• Human Body Elements • Anatomical Terminology
• Cell Structure and Function • Cellular Processes
• Digestive System • Reproductive System
• Protein Digestion • Uterine Cycle
Page 1
,• Kidney Function • Measurement Conversions
• Medical Terminology • Physiological Terms
• Nervous System • Language and Grammar
• Tissue Types • Skeletal System
• Body Planes and Directions • Bone Structure
• Muscle Types • Endocrine System
• Cardiovascular System • Urinary System
• Reproductive Hormones • Joint Types
• Roman Numerals
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 839
What are the most abundant elements of the human body?
CORRECT ANSWER
Carbon, Hydrogen, Oxygen, Nitrogen
RATIONALE
Carbon, hydrogen, oxygen, and nitrogen constitute the primary building blocks of biomolecules,
forming the structural basis of proteins, nucleic acids, carbohydrates, and lipids essential for life. Their
abundance reflects their critical roles in cellular metabolism and the biochemical processes that sustain
human physiology.
Q2 QUESTION 2 OF 839
90% of the human body is composed of just four elements which are:
CORRECT ANSWER
Carbon, Hydrogen, Oxygen, Nitrogen
Page 2
, RATIONALE
Carbon, hydrogen, oxygen, and nitrogen are the primary elements that form the basic building blocks of
biological macromolecules, including proteins, nucleic acids, carbohydrates, and lipids, which are
essential for life. Their abundance in the human body underscores their roles in maintaining cellular
structure and function.
Q3 QUESTION 3 OF 839
Subatomic particles are:
CORRECT ANSWER
Protons (positive), Neutrons (neutral) and Electrons (negative)
RATIONALE
Subatomic particles are the fundamental constituents of atoms, with protons carrying a positive charge,
neutrons having no charge, and electrons possessing a negative charge, creating the basis for atomic
structure and chemical behavior. Understanding these charges is critical for grasping concepts such as
atomic stability and interactions in chemical reactions.
Q4 QUESTION 4 OF 839
The number of protons and neutrons is called:
CORRECT ANSWER
Mass Number
RATIONALE
Mass number quantifies the total count of protons and neutrons within an atomic nucleus, reflecting the
atom's mass and stability. This concept is fundamental in understanding isotopes and nuclear reactions,
as variations in mass number can influence atomic behavior.
Q5 QUESTION 5 OF 839
What is a molecule?
CORRECT ANSWER
Atoms bonded together to form a chemical unit
Page 3
, RATIONALE
Atoms bond through covalent or ionic interactions to create molecules, which represent the smallest
identifiable unit of a compound, retaining its chemical properties. Understanding this fundamental
concept is for grasping the structure and behavior of matter in chemistry.
Q6 QUESTION 6 OF 839
What are ions?
CORRECT ANSWER
Particle that is electrically charged because it has gained or lost one or more eletrons
RATIONALE
Ions are formed when atoms gain or lose electrons, resulting in an imbalance between the number of
protons and electrons, which creates a net electrical charge. This charge can influence chemical
reactivity and the behavior of substances in various environments.
Q7 QUESTION 7 OF 839
hydrophilic means
CORRECT ANSWER
water-living
RATIONALE
Hydrophilic substances have an affinity for water, allowing them to dissolve or interact favorably with
aqueous environments. This property is crucial for biological processes, such as nutrient transport and
cellular interactions, where water acts as a solvent.
Q8 QUESTION 8 OF 839
What is pH?
CORRECT ANSWER
a measure of hydrogen ion concentration
Page 4
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
HESI Entrance Exam
Questions & Answers
2026-2027 | Latest
Verified Questions
(Rationales)
Verified Answers Exam Ready With Rationales
839 QUESTIONS
DOCUMENT OVERVIEW
This document contains 839 verified questions along with their correct answers and detailed
rationales, focusing on fundamental concepts in human anatomy and physiology. It serves as a
comprehensive resource for students preparing for the HESI Entrance Exam and is ideal for study,
review, and certification preparation. The inclusion of diagrams and images enhances
understanding and retention of critical information.
CONTENTS
• Human Body Elements • Anatomical Terminology
• Cell Structure and Function • Cellular Processes
• Digestive System • Reproductive System
• Protein Digestion • Uterine Cycle
Page 1
,• Kidney Function • Measurement Conversions
• Medical Terminology • Physiological Terms
• Nervous System • Language and Grammar
• Tissue Types • Skeletal System
• Body Planes and Directions • Bone Structure
• Muscle Types • Endocrine System
• Cardiovascular System • Urinary System
• Reproductive Hormones • Joint Types
• Roman Numerals
E XA M Q U EST I O N S
Q1 QUESTION 1 OF 839
What are the most abundant elements of the human body?
CORRECT ANSWER
Carbon, Hydrogen, Oxygen, Nitrogen
RATIONALE
Carbon, hydrogen, oxygen, and nitrogen constitute the primary building blocks of biomolecules,
forming the structural basis of proteins, nucleic acids, carbohydrates, and lipids essential for life. Their
abundance reflects their critical roles in cellular metabolism and the biochemical processes that sustain
human physiology.
Q2 QUESTION 2 OF 839
90% of the human body is composed of just four elements which are:
CORRECT ANSWER
Carbon, Hydrogen, Oxygen, Nitrogen
Page 2
, RATIONALE
Carbon, hydrogen, oxygen, and nitrogen are the primary elements that form the basic building blocks of
biological macromolecules, including proteins, nucleic acids, carbohydrates, and lipids, which are
essential for life. Their abundance in the human body underscores their roles in maintaining cellular
structure and function.
Q3 QUESTION 3 OF 839
Subatomic particles are:
CORRECT ANSWER
Protons (positive), Neutrons (neutral) and Electrons (negative)
RATIONALE
Subatomic particles are the fundamental constituents of atoms, with protons carrying a positive charge,
neutrons having no charge, and electrons possessing a negative charge, creating the basis for atomic
structure and chemical behavior. Understanding these charges is critical for grasping concepts such as
atomic stability and interactions in chemical reactions.
Q4 QUESTION 4 OF 839
The number of protons and neutrons is called:
CORRECT ANSWER
Mass Number
RATIONALE
Mass number quantifies the total count of protons and neutrons within an atomic nucleus, reflecting the
atom's mass and stability. This concept is fundamental in understanding isotopes and nuclear reactions,
as variations in mass number can influence atomic behavior.
Q5 QUESTION 5 OF 839
What is a molecule?
CORRECT ANSWER
Atoms bonded together to form a chemical unit
Page 3
, RATIONALE
Atoms bond through covalent or ionic interactions to create molecules, which represent the smallest
identifiable unit of a compound, retaining its chemical properties. Understanding this fundamental
concept is for grasping the structure and behavior of matter in chemistry.
Q6 QUESTION 6 OF 839
What are ions?
CORRECT ANSWER
Particle that is electrically charged because it has gained or lost one or more eletrons
RATIONALE
Ions are formed when atoms gain or lose electrons, resulting in an imbalance between the number of
protons and electrons, which creates a net electrical charge. This charge can influence chemical
reactivity and the behavior of substances in various environments.
Q7 QUESTION 7 OF 839
hydrophilic means
CORRECT ANSWER
water-living
RATIONALE
Hydrophilic substances have an affinity for water, allowing them to dissolve or interact favorably with
aqueous environments. This property is crucial for biological processes, such as nutrient transport and
cellular interactions, where water acts as a solvent.
Q8 QUESTION 8 OF 839
What is pH?
CORRECT ANSWER
a measure of hydrogen ion concentration
Page 4
