,NU 545 Unit 2 Exam | Physio-Path Adv Nursing (2026)
Q&A | University of South Alabama
1. Which brain region is primarily responsible for maintaining wakefulness,
controlling thought, speech, emotions, and behavior, as well as maintaining
balance and posture?
A) Prefrontal lobe
B) Occipital lobe
C) Cerebellum
D) Medulla oblongata
Correct Answer: Prefrontal lobe
Rationale: The prefrontal lobe is responsible for higher-level cognitive
functions, including maintaining wakefulness, controlling thought, speech,
emotions, and behavior, and contributing to balance and posture. The occipital
lobe is primarily visual, the cerebellum coordinates movement and balance, and
the medulla oblongata controls vital autonomic functions such as respiration and
heart rate.
2. What is the primary function of the arachnoid villi?
A) Produce cerebrospinal fluid
B) Absorb cerebrospinal fluid into the cerebral venous sinuses
C) Protect the brain from trauma
D) Supply blood to the brainstem
Correct Answer: Absorb cerebrospinal fluid into the cerebral venous sinuses
,Rationale: The arachnoid villi protrude into the venous sinuses and act as one-
way valves to absorb cerebrospinal fluid (CSF) into the bloodstream, preventing
CSF accumulation. CSF is primarily produced by the choroid plexus, not the
arachnoid villi. Protection is provided by the meninges and skull, and blood supply
comes from the cerebral arteries.
3. Where is the primary pathological defect in Parkinson’s disease?
A) Loss of dopaminergic pigmented neurons in the substantia nigra
B) Degeneration of the myelin sheath in the CNS
C) Formation of beta-amyloid plaques
D) Loss of acetylcholine receptors at the neuromuscular junction
Correct Answer: Loss of dopaminergic pigmented neurons in the substantia
nigra
Rationale: Parkinson’s disease is primarily caused by the degeneration of
dopamine-producing neurons in the substantia nigra pars compacta, leading to a
loss of dopamine in the basal ganglia. Myelin degeneration is characteristic of
multiple sclerosis. Beta-amyloid plaques are seen in Alzheimer’s disease. Loss of
acetylcholine receptors occurs in myasthenia gravis.
4. Which meningeal layer is responsible for the absorption of cerebrospinal fluid?
A) Dura mater
B) Pia mater
C) Arachnoid mater
D) Falx cerebri
, Correct Answer: Arachnoid mater
Rationale: The arachnoid mater contains the arachnoid villi, which protrude
into the venous sinuses and absorb cerebrospinal fluid into the bloodstream. The
dura mater is the outermost layer, the pia mater is the innermost layer, and the
falx cerebri is a fold of the dura mater. The arachnoid mater is the key structure
for CSF reabsorption.
5. Which structure links the hypothalamus to the pituitary gland?
A) Fornix
B) Mammillary bodies
C) Infundibulum
D) Pineal gland
Correct Answer: Infundibulum
Rationale: The infundibulum, or pituitary stalk, connects the hypothalamus to
the pituitary gland, enabling neuroendocrine communication. The fornix is a
bundle of nerve fibers, the mammillary bodies are involved in memory, and the
pineal gland produces melatonin. The infundibulum is the anatomical link.
6. A blockage of the cerebral aqueduct would most likely result in which type of
hydrocephalus?
A) Communicating hydrocephalus
B) Noncommunicating hydrocephalus
C) Normal-pressure hydrocephalus
D) Increased CSF absorption
Q&A | University of South Alabama
1. Which brain region is primarily responsible for maintaining wakefulness,
controlling thought, speech, emotions, and behavior, as well as maintaining
balance and posture?
A) Prefrontal lobe
B) Occipital lobe
C) Cerebellum
D) Medulla oblongata
Correct Answer: Prefrontal lobe
Rationale: The prefrontal lobe is responsible for higher-level cognitive
functions, including maintaining wakefulness, controlling thought, speech,
emotions, and behavior, and contributing to balance and posture. The occipital
lobe is primarily visual, the cerebellum coordinates movement and balance, and
the medulla oblongata controls vital autonomic functions such as respiration and
heart rate.
2. What is the primary function of the arachnoid villi?
A) Produce cerebrospinal fluid
B) Absorb cerebrospinal fluid into the cerebral venous sinuses
C) Protect the brain from trauma
D) Supply blood to the brainstem
Correct Answer: Absorb cerebrospinal fluid into the cerebral venous sinuses
,Rationale: The arachnoid villi protrude into the venous sinuses and act as one-
way valves to absorb cerebrospinal fluid (CSF) into the bloodstream, preventing
CSF accumulation. CSF is primarily produced by the choroid plexus, not the
arachnoid villi. Protection is provided by the meninges and skull, and blood supply
comes from the cerebral arteries.
3. Where is the primary pathological defect in Parkinson’s disease?
A) Loss of dopaminergic pigmented neurons in the substantia nigra
B) Degeneration of the myelin sheath in the CNS
C) Formation of beta-amyloid plaques
D) Loss of acetylcholine receptors at the neuromuscular junction
Correct Answer: Loss of dopaminergic pigmented neurons in the substantia
nigra
Rationale: Parkinson’s disease is primarily caused by the degeneration of
dopamine-producing neurons in the substantia nigra pars compacta, leading to a
loss of dopamine in the basal ganglia. Myelin degeneration is characteristic of
multiple sclerosis. Beta-amyloid plaques are seen in Alzheimer’s disease. Loss of
acetylcholine receptors occurs in myasthenia gravis.
4. Which meningeal layer is responsible for the absorption of cerebrospinal fluid?
A) Dura mater
B) Pia mater
C) Arachnoid mater
D) Falx cerebri
, Correct Answer: Arachnoid mater
Rationale: The arachnoid mater contains the arachnoid villi, which protrude
into the venous sinuses and absorb cerebrospinal fluid into the bloodstream. The
dura mater is the outermost layer, the pia mater is the innermost layer, and the
falx cerebri is a fold of the dura mater. The arachnoid mater is the key structure
for CSF reabsorption.
5. Which structure links the hypothalamus to the pituitary gland?
A) Fornix
B) Mammillary bodies
C) Infundibulum
D) Pineal gland
Correct Answer: Infundibulum
Rationale: The infundibulum, or pituitary stalk, connects the hypothalamus to
the pituitary gland, enabling neuroendocrine communication. The fornix is a
bundle of nerve fibers, the mammillary bodies are involved in memory, and the
pineal gland produces melatonin. The infundibulum is the anatomical link.
6. A blockage of the cerebral aqueduct would most likely result in which type of
hydrocephalus?
A) Communicating hydrocephalus
B) Noncommunicating hydrocephalus
C) Normal-pressure hydrocephalus
D) Increased CSF absorption
