BIO 201 Exam 1 V1 | BIO 201 A&P | StraighterLine | Q&A with Rationale (BIO 201 Exam 1)
1. Which level of structural organization is composed of two or more different types of tissues
that work together to perform a specific function?
A. Organ level
B. Cellular level
C. Chemical level
D. System level
Answer: A
Rationale: The organ level represents a complex stage where different tissues integrate to
form a functional unit. For example, the stomach contains epithelial, connective, and
muscular tissues. This hierarchical arrangement allows for specialized physiological
processes to occur within the body.
2. In the anatomical position, the palms of the hands are oriented:
A. Posteriorly
B. Medially
C. Anteriorly
D. Superiorly
Answer: C
,Rationale: The anatomical position is a standardized posture used for clear
communication in medical contexts. It involves the subject standing erect with feet flat and
arms at the sides. By definition, the palms must face forward, or anteriorly, to ensure
consistent directional terminology.
3. Which feedback mechanism returns a variable to its set point, thereby maintaining
homeostasis?
A. Positive feedback
B. Equilibrium feedback
C. Neutral feedback
D. Negative feedback
Answer: D
Rationale: Negative feedback is the primary mechanism for maintaining internal stability
in the human body. It functions by detecting a change and initiating responses that reverse
the direction of that change. This ensures that variables like body temperature and blood
glucose remain within a narrow physiological range.
4. A plane that divides the body into equal right and left halves is called a:
A. Midsagittal plane
B. Frontal plane
C. Transverse plane
, D. Parasagittal plane
Answer: A
Rationale: A midsagittal plane passes through the midline of the body or an organ. It
creates two symmetrical halves, unlike a parasagittal plane which produces unequal left
and right portions. Understanding these planes is essential for interpreting medical
imaging and surgical approaches.
5. The term ‘proximal’ is best described as:
A. Farther from the attachment of a limb to the trunk
B. Closer to the attachment of a limb to the trunk
C. Toward the head or upper part of a structure
D. Toward the midline of the body
Answer: B
Rationale: Proximal is a directional term used specifically for the appendages. It indicates
that a structure is situated nearer to the point of origin or attachment. For instance, the
elbow is proximal to the wrist because it is closer to the shoulder attachment.
6. Which subatomic particle carries a negative electrical charge?
A. Electron
B. Neutron
C. Proton
1. Which level of structural organization is composed of two or more different types of tissues
that work together to perform a specific function?
A. Organ level
B. Cellular level
C. Chemical level
D. System level
Answer: A
Rationale: The organ level represents a complex stage where different tissues integrate to
form a functional unit. For example, the stomach contains epithelial, connective, and
muscular tissues. This hierarchical arrangement allows for specialized physiological
processes to occur within the body.
2. In the anatomical position, the palms of the hands are oriented:
A. Posteriorly
B. Medially
C. Anteriorly
D. Superiorly
Answer: C
,Rationale: The anatomical position is a standardized posture used for clear
communication in medical contexts. It involves the subject standing erect with feet flat and
arms at the sides. By definition, the palms must face forward, or anteriorly, to ensure
consistent directional terminology.
3. Which feedback mechanism returns a variable to its set point, thereby maintaining
homeostasis?
A. Positive feedback
B. Equilibrium feedback
C. Neutral feedback
D. Negative feedback
Answer: D
Rationale: Negative feedback is the primary mechanism for maintaining internal stability
in the human body. It functions by detecting a change and initiating responses that reverse
the direction of that change. This ensures that variables like body temperature and blood
glucose remain within a narrow physiological range.
4. A plane that divides the body into equal right and left halves is called a:
A. Midsagittal plane
B. Frontal plane
C. Transverse plane
, D. Parasagittal plane
Answer: A
Rationale: A midsagittal plane passes through the midline of the body or an organ. It
creates two symmetrical halves, unlike a parasagittal plane which produces unequal left
and right portions. Understanding these planes is essential for interpreting medical
imaging and surgical approaches.
5. The term ‘proximal’ is best described as:
A. Farther from the attachment of a limb to the trunk
B. Closer to the attachment of a limb to the trunk
C. Toward the head or upper part of a structure
D. Toward the midline of the body
Answer: B
Rationale: Proximal is a directional term used specifically for the appendages. It indicates
that a structure is situated nearer to the point of origin or attachment. For instance, the
elbow is proximal to the wrist because it is closer to the shoulder attachment.
6. Which subatomic particle carries a negative electrical charge?
A. Electron
B. Neutron
C. Proton
