BIO 201 Exam 1 V3 | BIO 201 A&P |
StraighterLine | Q&A with Rationale (BIO
201 Exam 1)
1. Which of the following best describes the anatomical position?
A. Standing erect with arms overhead and feet together.
B. Lying supine with arms extended and palms facing the torso.
C. Standing erect, arms at sides, palms facing forward, feet flat on the floor.
D. Sitting upright with palms resting on the knees.
Answer: C
Rationale: The anatomical position serves as a standard reference for all medical and
anatomical descriptions. In this position, the body is upright, feet are parallel, and the
palms face anteriorly. This consistency prevents confusion when describing locations of
body parts regardless of actual movement.
2. A feedback mechanism that enhances or intensifies a stimulus is known as:
A. Negative feedback
B. Homeostatic reversal
C. Equilibrium maintenance
D. Positive feedback
,Answer: D
Rationale: Positive feedback loops move the system away from its equilibrium state by
reinforcing the initial stimulus. Examples include blood clotting and the release of oxytocin
during childbirth. Most physiological systems, however, utilize negative feedback to
maintain stability.
3. The sagittal plane divides the body into which sections?
A. Superior and inferior portions
B. Internal and external portions
C. Anterior and posterior portions
D. Left and right portions
Answer: D
Rationale: The sagittal plane is a vertical plane that passes through the body from front to
back. If the plane passes directly through the midline, it is referred to as the midsagittal or
median plane. This differs from the transverse plane, which divides the body into top and
bottom sections.
4. Which subatomic particle carries a negative electrical charge?
A. Proton
B. Electron
C. Positron
, D. Neutron
Answer: B
Rationale: Electrons are tiny particles that orbit the atomic nucleus in specific shells or
energy levels. They carry a negative charge and are responsible for the chemical bonding
behavior of atoms. Protons carry a positive charge, while neutrons have no charge at all.
5. An atom with the same number of protons but a different number of neutrons is called an:
A. Ion
B. Isotope
C. Isomer
D. Isobar
Answer: B
Rationale: Isotopes are variants of a particular chemical element which differ in neutron
count, although they possess the same number of protons. Because they have the same
number of protons, they occupy the same position in the periodic table. Many isotopes are
stable, while others are radioactive and decay over time.
6. What type of bond is formed when one atom loses an electron and another atom gains
that electron?
A. Covalent bond
B. Hydrogen bond
StraighterLine | Q&A with Rationale (BIO
201 Exam 1)
1. Which of the following best describes the anatomical position?
A. Standing erect with arms overhead and feet together.
B. Lying supine with arms extended and palms facing the torso.
C. Standing erect, arms at sides, palms facing forward, feet flat on the floor.
D. Sitting upright with palms resting on the knees.
Answer: C
Rationale: The anatomical position serves as a standard reference for all medical and
anatomical descriptions. In this position, the body is upright, feet are parallel, and the
palms face anteriorly. This consistency prevents confusion when describing locations of
body parts regardless of actual movement.
2. A feedback mechanism that enhances or intensifies a stimulus is known as:
A. Negative feedback
B. Homeostatic reversal
C. Equilibrium maintenance
D. Positive feedback
,Answer: D
Rationale: Positive feedback loops move the system away from its equilibrium state by
reinforcing the initial stimulus. Examples include blood clotting and the release of oxytocin
during childbirth. Most physiological systems, however, utilize negative feedback to
maintain stability.
3. The sagittal plane divides the body into which sections?
A. Superior and inferior portions
B. Internal and external portions
C. Anterior and posterior portions
D. Left and right portions
Answer: D
Rationale: The sagittal plane is a vertical plane that passes through the body from front to
back. If the plane passes directly through the midline, it is referred to as the midsagittal or
median plane. This differs from the transverse plane, which divides the body into top and
bottom sections.
4. Which subatomic particle carries a negative electrical charge?
A. Proton
B. Electron
C. Positron
, D. Neutron
Answer: B
Rationale: Electrons are tiny particles that orbit the atomic nucleus in specific shells or
energy levels. They carry a negative charge and are responsible for the chemical bonding
behavior of atoms. Protons carry a positive charge, while neutrons have no charge at all.
5. An atom with the same number of protons but a different number of neutrons is called an:
A. Ion
B. Isotope
C. Isomer
D. Isobar
Answer: B
Rationale: Isotopes are variants of a particular chemical element which differ in neutron
count, although they possess the same number of protons. Because they have the same
number of protons, they occupy the same position in the periodic table. Many isotopes are
stable, while others are radioactive and decay over time.
6. What type of bond is formed when one atom loses an electron and another atom gains
that electron?
A. Covalent bond
B. Hydrogen bond
