BIO 201 Final Exam V1 | BIO 201 A&P |
StraighterLine | Q&A with Rationale (BIO
201 Final Exam)
1. The maintenance of a relatively stable internal environment despite constant changes in
the external environment is known as:
A. Homeostasis
B. Metabolism
C. Integration
D. Differentiation
Answer: A
Rationale: Homeostasis is the fundamental principle of physiology that describes the
body’s ability to maintain equilibrium. This process involves a continuous cycle of
monitoring, evaluating, and changing various body parameters. It typically utilizes negative
feedback loops to counteract deviations from a physiological set point.
2. In anatomical terminology, the elbow is described as being __________ to the wrist.
A. Proximal
B. Lateral
C. Distal
D. Deep
,Answer: A
Rationale: The term proximal refers to a position that is closer to the point of attachment
or the trunk of the body. Since the elbow is closer to the shoulder than the wrist is, it is
considered proximal. Conversely, the wrist would be described as distal to the elbow in
standard anatomical orientation.
3. Which of the following planes divides the body into superior and inferior portions?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
Answer: C
Rationale: A transverse plane, also known as a horizontal plane, cuts through the body
horizontally. This division results in an upper (superior) part and a lower (inferior) part. It
is one of the three standard anatomical planes used to describe the orientation of body
sections.
4. The thoracic cavity is separated from the abdominopelvic cavity by a muscular structure
known as the:
A. Pleura
B. Mediastinum
, C. Diaphragm
D. Peritoneum
Answer: C
Rationale: The diaphragm is a dome-shaped sheet of skeletal muscle that serves as the
physical barrier between the chest and the abdomen. It plays a critical role in the
respiratory system by changing the volume of the thoracic cavity during breathing. This
muscle is essential for creating the pressure gradients necessary for pulmonary ventilation.
5. A substance that has a pH of 3.0 is classified as a(n):
A. Strong acid
B. Strong base
C. Weak acid
D. Neutral substance
Answer: A
Rationale: The pH scale ranges from 0 to 14, with values below 7 being acidic and values
above 7 being basic. A pH of 3.0 indicates a high concentration of hydrogen ions,
characteristic of a strong acid. Because the scale is logarithmic, each unit change represents
a tenfold difference in hydrogen ion concentration.
StraighterLine | Q&A with Rationale (BIO
201 Final Exam)
1. The maintenance of a relatively stable internal environment despite constant changes in
the external environment is known as:
A. Homeostasis
B. Metabolism
C. Integration
D. Differentiation
Answer: A
Rationale: Homeostasis is the fundamental principle of physiology that describes the
body’s ability to maintain equilibrium. This process involves a continuous cycle of
monitoring, evaluating, and changing various body parameters. It typically utilizes negative
feedback loops to counteract deviations from a physiological set point.
2. In anatomical terminology, the elbow is described as being __________ to the wrist.
A. Proximal
B. Lateral
C. Distal
D. Deep
,Answer: A
Rationale: The term proximal refers to a position that is closer to the point of attachment
or the trunk of the body. Since the elbow is closer to the shoulder than the wrist is, it is
considered proximal. Conversely, the wrist would be described as distal to the elbow in
standard anatomical orientation.
3. Which of the following planes divides the body into superior and inferior portions?
A. Sagittal plane
B. Frontal plane
C. Transverse plane
D. Midsagittal plane
Answer: C
Rationale: A transverse plane, also known as a horizontal plane, cuts through the body
horizontally. This division results in an upper (superior) part and a lower (inferior) part. It
is one of the three standard anatomical planes used to describe the orientation of body
sections.
4. The thoracic cavity is separated from the abdominopelvic cavity by a muscular structure
known as the:
A. Pleura
B. Mediastinum
, C. Diaphragm
D. Peritoneum
Answer: C
Rationale: The diaphragm is a dome-shaped sheet of skeletal muscle that serves as the
physical barrier between the chest and the abdomen. It plays a critical role in the
respiratory system by changing the volume of the thoracic cavity during breathing. This
muscle is essential for creating the pressure gradients necessary for pulmonary ventilation.
5. A substance that has a pH of 3.0 is classified as a(n):
A. Strong acid
B. Strong base
C. Weak acid
D. Neutral substance
Answer: A
Rationale: The pH scale ranges from 0 to 14, with values below 7 being acidic and values
above 7 being basic. A pH of 3.0 indicates a high concentration of hydrogen ions,
characteristic of a strong acid. Because the scale is logarithmic, each unit change represents
a tenfold difference in hydrogen ion concentration.
