BIOL251 Human Anatomy & Physiology I
w/Lab Final Exam – 2026 WITH SEVERAL
TOPICS, 150 QUESTIONS WITH MULTIPLE
CHOICE QUESTIONS, CORRECT ANSWERS ,
WELL VERIFIED AND WELL ELABORATED
RATIONALES!
Section 1: Introduction to Anatomy & Physiology and Chemistry (Questions 1-25)
1. Which level of structural organization is composed of two or more tissue types that work together to
perform a common function?
A. Cellular
B. Tissue
C. Organ
D. Organ System
ANSWER: C. Organ
Rationale: An organ is defined as a structure composed of at least two different tissue types that work
together to carry out a specific function. For example, the stomach has epithelial, connective, muscle,
and nervous tissues.
A. Cellular refers to individual cells, the basic units of life.
B. Tissue is a group of similar cells.
,D. Organ System is a group of organs working together.
2. The heart is located in which body cavity?
A. Cranial cavity
B. Thoracic cavity
C. Abdominal cavity
D. Pelvic cavity
ANSWER: B. Thoracic cavity
Rationale: The thoracic cavity, also known as the chest cavity, is protected by the rib cage and contains
the heart, lungs, esophagus, and trachea.
A. Cranial cavity houses the brain.
C. Abdominal cavity contains the stomach, intestines, liver, etc.
D. Pelvic cavity contains the urinary bladder and reproductive organs.
3. A cut that divides the body into anterior and posterior portions is known as a:
A. Sagittal plane
B. Transverse plane
C. Frontal (coronal) plane
D. Oblique plane
ANSWER: C. Frontal (coronal) plane
Rationale: A coronal or frontal plane runs vertically from side to side, dividing the body into anterior
(front) and posterior (back) sections.
,A. Sagittal divides into left and right.
B. Transverse divides into superior and inferior.
D. Oblique is a cut at an angle.
4. The term "proximal" means:
A. Toward the midline of the body
B. Farthest from the point of attachment to the trunk
C. Closest to the point of attachment to the trunk
D. Toward the back of the body
ANSWER: C. Closest to the point of attachment to the trunk
Rationale: Proximal is a directional term indicating a point closer to the trunk of the body or the point of
origin of a limb.
A. Toward the midline is medial.
B. Farthest from the point of attachment is distal.
D. Toward the back is dorsal or posterior.
5. The primary element in all organic molecules is:
A. Oxygen
B. Nitrogen
C. Carbon
D. Hydrogen
ANSWER: C. Carbon
, Rationale: Carbon is the cornerstone of organic chemistry. Its unique ability to form four stable covalent
bonds allows it to form the complex, diverse molecules required for life, such as carbohydrates, lipids,
proteins, and nucleic acids.
A. Oxygen is abundant in the body but is not the primary structural element of organic molecules.
B. Nitrogen is found in proteins and nucleic acids but not all organic compounds.
D. Hydrogen is also common in organic molecules but is not the backbone element.
6. Which type of chemical bond involves the transfer of electrons from one atom to another?
A. Covalent bond
B. Ionic bond
C. Hydrogen bond
D. Peptide bond
ANSWER: B. Ionic bond
Rationale: An ionic bond is formed when one atom loses one or more electrons (becoming a cation) and
another atom gains those electrons (becoming an anion), creating an electrostatic attraction between
the oppositely charged ions.
A. Covalent bonds involve the sharing of electrons.
C. Hydrogen bonds are weak attractions between a hydrogen atom and an electronegative atom.
D. Peptide bonds are specific covalent bonds between amino acids.
7. The pH scale measures the concentration of which ions in a solution?
A. Sodium (Na+) ions
B. Hydrogen (H+) ions
w/Lab Final Exam – 2026 WITH SEVERAL
TOPICS, 150 QUESTIONS WITH MULTIPLE
CHOICE QUESTIONS, CORRECT ANSWERS ,
WELL VERIFIED AND WELL ELABORATED
RATIONALES!
Section 1: Introduction to Anatomy & Physiology and Chemistry (Questions 1-25)
1. Which level of structural organization is composed of two or more tissue types that work together to
perform a common function?
A. Cellular
B. Tissue
C. Organ
D. Organ System
ANSWER: C. Organ
Rationale: An organ is defined as a structure composed of at least two different tissue types that work
together to carry out a specific function. For example, the stomach has epithelial, connective, muscle,
and nervous tissues.
A. Cellular refers to individual cells, the basic units of life.
B. Tissue is a group of similar cells.
,D. Organ System is a group of organs working together.
2. The heart is located in which body cavity?
A. Cranial cavity
B. Thoracic cavity
C. Abdominal cavity
D. Pelvic cavity
ANSWER: B. Thoracic cavity
Rationale: The thoracic cavity, also known as the chest cavity, is protected by the rib cage and contains
the heart, lungs, esophagus, and trachea.
A. Cranial cavity houses the brain.
C. Abdominal cavity contains the stomach, intestines, liver, etc.
D. Pelvic cavity contains the urinary bladder and reproductive organs.
3. A cut that divides the body into anterior and posterior portions is known as a:
A. Sagittal plane
B. Transverse plane
C. Frontal (coronal) plane
D. Oblique plane
ANSWER: C. Frontal (coronal) plane
Rationale: A coronal or frontal plane runs vertically from side to side, dividing the body into anterior
(front) and posterior (back) sections.
,A. Sagittal divides into left and right.
B. Transverse divides into superior and inferior.
D. Oblique is a cut at an angle.
4. The term "proximal" means:
A. Toward the midline of the body
B. Farthest from the point of attachment to the trunk
C. Closest to the point of attachment to the trunk
D. Toward the back of the body
ANSWER: C. Closest to the point of attachment to the trunk
Rationale: Proximal is a directional term indicating a point closer to the trunk of the body or the point of
origin of a limb.
A. Toward the midline is medial.
B. Farthest from the point of attachment is distal.
D. Toward the back is dorsal or posterior.
5. The primary element in all organic molecules is:
A. Oxygen
B. Nitrogen
C. Carbon
D. Hydrogen
ANSWER: C. Carbon
, Rationale: Carbon is the cornerstone of organic chemistry. Its unique ability to form four stable covalent
bonds allows it to form the complex, diverse molecules required for life, such as carbohydrates, lipids,
proteins, and nucleic acids.
A. Oxygen is abundant in the body but is not the primary structural element of organic molecules.
B. Nitrogen is found in proteins and nucleic acids but not all organic compounds.
D. Hydrogen is also common in organic molecules but is not the backbone element.
6. Which type of chemical bond involves the transfer of electrons from one atom to another?
A. Covalent bond
B. Ionic bond
C. Hydrogen bond
D. Peptide bond
ANSWER: B. Ionic bond
Rationale: An ionic bond is formed when one atom loses one or more electrons (becoming a cation) and
another atom gains those electrons (becoming an anion), creating an electrostatic attraction between
the oppositely charged ions.
A. Covalent bonds involve the sharing of electrons.
C. Hydrogen bonds are weak attractions between a hydrogen atom and an electronegative atom.
D. Peptide bonds are specific covalent bonds between amino acids.
7. The pH scale measures the concentration of which ions in a solution?
A. Sodium (Na+) ions
B. Hydrogen (H+) ions
