HESI A2 ANATOMY (STUDY WORD FOR WORD) 2026 ACTUAL SAMPLE QUESTIONS AND ANSWERS
ALREADY GRADED A+. 100% VERIFIED SOLUTIONS | UPDATED PER LATEST GUIDELINES | GRADED A+
Question 1
Which of the following is the correct order of organization in the human body from simplest to most complex?
A. Cells → Tissues → Organs → Organ Systems → Organism
B. Tissues → Cells → Organs → Organ Systems → Organism
C. Organs → Tissues → Cells → Organ Systems → Organism
D. Organ Systems → Organs → Tissues → Cells → Organism
🟢 Correct Answer:
A. Cells → Tissues → Organs → Organ Systems → Organism
🔴 RATIONALE:
The levels of structural organization in the human body progress from cells (the basic unit of life) to tissues
(groups of similar cells), to organs (structures composed of multiple tissue types), to organ systems (groups of
organs working together), and finally to the organism (the complete living being). This hierarchical arrangement
is fundamental to understanding anatomy and physiology.
Question 2
What is the primary function of the mitochondria?
A. Protein synthesis
,B. ATP production
C. Lipid storage
D. DNA replication
🟢 Correct Answer:
B. ATP production
🔴 RATIONALE:
Mitochondria are known as the "powerhouses" of the cell because they are the site of aerobic cellular
respiration, where adenosine triphosphate (ATP) is produced. ATP is the primary energy currency of the cell.
Protein synthesis occurs at ribosomes, lipid storage occurs in adipocytes, and DNA replication occurs in the
nucleus.
Question 3
Which of the following is a characteristic of epithelial tissue?
A. It has abundant blood vessels
B. It is avascular
C. It contains large amounts of extracellular matrix
D. It is composed primarily of chondrocytes
🟢 Correct Answer:
B. It is avascular
🔴 RATIONALE:
Epithelial tissue is avascular, meaning it lacks blood vessels. It receives nutrients by diffusion from underlying
,connective tissue. Epithelial tissue has minimal extracellular matrix, is composed of tightly packed cells, and is
highly regenerative. Chondrocytes are found in cartilage, which is a type of connective tissue.
Question 4
Which body plane divides the body into equal right and left halves?
A. Sagittal plane
B. Midsagittal plane
C. Frontal plane
D. Transverse plane
🟢 Correct Answer:
B. Midsagittal plane
🔴 RATIONALE:
The midsagittal (median) plane divides the body into equal right and left halves. A sagittal plane divides the
body into right and left portions but not necessarily equal halves. The frontal (coronal) plane divides the body
into anterior and posterior portions, and the transverse (horizontal) plane divides the body into superior and
inferior portions.
Question 5
What is the function of the ribosomes?
A. Lipid synthesis
, B. Protein synthesis
C. Carbohydrate metabolism
D. ATP production
🟢 Correct Answer:
B. Protein synthesis
🔴 RATIONALE:
Ribosomes are the sites of protein synthesis. They translate messenger RNA into polypeptide chains. Lipid
synthesis occurs in the smooth endoplasmic reticulum, carbohydrate metabolism occurs in various organelles,
and ATP production occurs in the mitochondria.
Question 6
Which of the following bones is part of the axial skeleton?
A. Scapula
B. Clavicle
C. Sternum
D. Humerus
🟢 Correct Answer:
C. Sternum
🔴 RATIONALE:
The axial skeleton consists of the skull, vertebral column, and thoracic cage (ribs and sternum). The sternum is a
ALREADY GRADED A+. 100% VERIFIED SOLUTIONS | UPDATED PER LATEST GUIDELINES | GRADED A+
Question 1
Which of the following is the correct order of organization in the human body from simplest to most complex?
A. Cells → Tissues → Organs → Organ Systems → Organism
B. Tissues → Cells → Organs → Organ Systems → Organism
C. Organs → Tissues → Cells → Organ Systems → Organism
D. Organ Systems → Organs → Tissues → Cells → Organism
🟢 Correct Answer:
A. Cells → Tissues → Organs → Organ Systems → Organism
🔴 RATIONALE:
The levels of structural organization in the human body progress from cells (the basic unit of life) to tissues
(groups of similar cells), to organs (structures composed of multiple tissue types), to organ systems (groups of
organs working together), and finally to the organism (the complete living being). This hierarchical arrangement
is fundamental to understanding anatomy and physiology.
Question 2
What is the primary function of the mitochondria?
A. Protein synthesis
,B. ATP production
C. Lipid storage
D. DNA replication
🟢 Correct Answer:
B. ATP production
🔴 RATIONALE:
Mitochondria are known as the "powerhouses" of the cell because they are the site of aerobic cellular
respiration, where adenosine triphosphate (ATP) is produced. ATP is the primary energy currency of the cell.
Protein synthesis occurs at ribosomes, lipid storage occurs in adipocytes, and DNA replication occurs in the
nucleus.
Question 3
Which of the following is a characteristic of epithelial tissue?
A. It has abundant blood vessels
B. It is avascular
C. It contains large amounts of extracellular matrix
D. It is composed primarily of chondrocytes
🟢 Correct Answer:
B. It is avascular
🔴 RATIONALE:
Epithelial tissue is avascular, meaning it lacks blood vessels. It receives nutrients by diffusion from underlying
,connective tissue. Epithelial tissue has minimal extracellular matrix, is composed of tightly packed cells, and is
highly regenerative. Chondrocytes are found in cartilage, which is a type of connective tissue.
Question 4
Which body plane divides the body into equal right and left halves?
A. Sagittal plane
B. Midsagittal plane
C. Frontal plane
D. Transverse plane
🟢 Correct Answer:
B. Midsagittal plane
🔴 RATIONALE:
The midsagittal (median) plane divides the body into equal right and left halves. A sagittal plane divides the
body into right and left portions but not necessarily equal halves. The frontal (coronal) plane divides the body
into anterior and posterior portions, and the transverse (horizontal) plane divides the body into superior and
inferior portions.
Question 5
What is the function of the ribosomes?
A. Lipid synthesis
, B. Protein synthesis
C. Carbohydrate metabolism
D. ATP production
🟢 Correct Answer:
B. Protein synthesis
🔴 RATIONALE:
Ribosomes are the sites of protein synthesis. They translate messenger RNA into polypeptide chains. Lipid
synthesis occurs in the smooth endoplasmic reticulum, carbohydrate metabolism occurs in various organelles,
and ATP production occurs in the mitochondria.
Question 6
Which of the following bones is part of the axial skeleton?
A. Scapula
B. Clavicle
C. Sternum
D. Humerus
🟢 Correct Answer:
C. Sternum
🔴 RATIONALE:
The axial skeleton consists of the skull, vertebral column, and thoracic cage (ribs and sternum). The sternum is a
