BIO 201 Exam 4 V2 | BIO 201 A&P |
StraighterLine | Q&A with Rationale (BIO
201 Exam 4)
1. Which region of the brain is responsible for regulating basic vital functions such as heart
rate and respiration?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Thalamus
Answer: C
Rationale: The medulla oblongata is located in the brainstem and contains the cardiac and
respiratory centers. It serves as a conduction pathway for both ascending and descending
nerve tracts. Damage to this area is often fatal because it controls involuntary functions
essential for survival.
2. Which cranial nerve is primarily responsible for the sense of vision?
A. Cranial Nerve II
B. Cranial Nerve I
C. Cranial Nerve III
D. Cranial Nerve IV
,Answer: A
Rationale: Cranial Nerve II is the optic nerve, which carries visual information from the
retina to the brain. It is purely sensory in function and does not control eye movement. This
nerve transmits electrical impulses that are interpreted by the visual cortex in the occipital
lobe.
3. The division of the autonomic nervous system often referred to as ‘rest and digest’ is the:
A. Somatic nervous system
B. Sympathetic nervous system
C. Parasympathetic nervous system
D. Central nervous system
Answer: C
Rationale: The parasympathetic nervous system promotes energy conservation and
restoration. It stimulates activities like digestion and defecation while slowing the heart
rate. This system works in opposition to the sympathetic nervous system to maintain
homeostasis.
4. What is the primary function of the hypothalamus?
A. Coordination of skeletal muscle movement
B. Processing of visual stimuli
C. Regulation of body temperature and fluid balance
, D. Storing long-term memories
Answer: C
Rationale: The hypothalamus is a key regulator of the endocrine system and autonomic
nervous system. it controls thirst, hunger, and thermoregulation to maintain a stable
internal environment. Additionally, it links the nervous system to the endocrine system via
the pituitary gland.
5. Which structure connects the two cerebral hemispheres?
A. Corpus callosum
B. Pons
C. Basal nuclei
D. Septum pellucidum
Answer: A
Rationale: The corpus callosum is a large bundle of commissural fibers that allows
communication between the left and right hemispheres. It ensures that both sides of the
brain can share and process information simultaneously. Defects in this structure can lead
to split-brain syndrome where the hemispheres act independently.
6. In the spinal cord, where is the gray matter located?
A. On the outer surface
B. In the central ‘H’ or butterfly-shaped region
StraighterLine | Q&A with Rationale (BIO
201 Exam 4)
1. Which region of the brain is responsible for regulating basic vital functions such as heart
rate and respiration?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Thalamus
Answer: C
Rationale: The medulla oblongata is located in the brainstem and contains the cardiac and
respiratory centers. It serves as a conduction pathway for both ascending and descending
nerve tracts. Damage to this area is often fatal because it controls involuntary functions
essential for survival.
2. Which cranial nerve is primarily responsible for the sense of vision?
A. Cranial Nerve II
B. Cranial Nerve I
C. Cranial Nerve III
D. Cranial Nerve IV
,Answer: A
Rationale: Cranial Nerve II is the optic nerve, which carries visual information from the
retina to the brain. It is purely sensory in function and does not control eye movement. This
nerve transmits electrical impulses that are interpreted by the visual cortex in the occipital
lobe.
3. The division of the autonomic nervous system often referred to as ‘rest and digest’ is the:
A. Somatic nervous system
B. Sympathetic nervous system
C. Parasympathetic nervous system
D. Central nervous system
Answer: C
Rationale: The parasympathetic nervous system promotes energy conservation and
restoration. It stimulates activities like digestion and defecation while slowing the heart
rate. This system works in opposition to the sympathetic nervous system to maintain
homeostasis.
4. What is the primary function of the hypothalamus?
A. Coordination of skeletal muscle movement
B. Processing of visual stimuli
C. Regulation of body temperature and fluid balance
, D. Storing long-term memories
Answer: C
Rationale: The hypothalamus is a key regulator of the endocrine system and autonomic
nervous system. it controls thirst, hunger, and thermoregulation to maintain a stable
internal environment. Additionally, it links the nervous system to the endocrine system via
the pituitary gland.
5. Which structure connects the two cerebral hemispheres?
A. Corpus callosum
B. Pons
C. Basal nuclei
D. Septum pellucidum
Answer: A
Rationale: The corpus callosum is a large bundle of commissural fibers that allows
communication between the left and right hemispheres. It ensures that both sides of the
brain can share and process information simultaneously. Defects in this structure can lead
to split-brain syndrome where the hemispheres act independently.
6. In the spinal cord, where is the gray matter located?
A. On the outer surface
B. In the central ‘H’ or butterfly-shaped region
