NURS 5357 Neurobiology Exam 3 – copy
Questions With Complete Solutions
Course
NURS 5357
1. Which of the following structures is primarily responsible for the integration of sensory
input and motor output in the central nervous system (CNS)?
A) Brainstem
B) Thalamus
C) Spinal cord
D) Cerebellum
Answer: D) Cerebellum
Rationale: The cerebellum plays a critical role in the coordination of voluntary movements and
the integration of sensory input with motor output. It helps fine-tune motor actions by processing
information about body position and movement.
2. A patient presents with dysphagia (difficulty swallowing) and dysarthria (difficulty
speaking), which are symptoms of damage to which area of the brain?
A) Frontal lobe
B) Medulla oblongata
C) Parietal lobe
D) Temporal lobe
Answer: B) Medulla oblongata
Rationale: The medulla oblongata contains vital centers for autonomic functions, including
control of swallowing and speech. Damage to this area can impair dysphagia and dysarthria.
3. In a patient with Parkinson’s disease, which neurotransmitter is most significantly
deficient?
A) Acetylcholine
B) Dopamine
C) Serotonin
D) Norepinephrine
Answer: B) Dopamine
Rationale: Parkinson’s disease is caused by the degeneration of dopaminergic neurons in the
substantia nigra, resulting in a deficiency of dopamine in the brain. This neurotransmitter is
crucial for movement control, and its lack leads to the characteristic symptoms of tremors,
rigidity, and bradykinesia.
,4. Which of the following is the main role of the blood-brain barrier?
A) To protect the brain from mechanical injury
B) To allow the passage of most ions and neurotransmitters
C) To prevent harmful substances from entering the brain
D) To regulate the production of cerebrospinal fluid (CSF)
Answer: C) To prevent harmful substances from entering the brain
Rationale: The blood-brain barrier is a selective permeability barrier that protects the brain
from potentially harmful substances in the blood, such as pathogens and toxins, while allowing
the passage of essential nutrients and gases like oxygen.
5. What is the function of astrocytes in the central nervous system (CNS)?
A) To produce cerebrospinal fluid
B) To form myelin sheaths around neurons
C) To maintain the blood-brain barrier
D) To generate action potentials in neurons
Answer: C) To maintain the blood-brain barrier
Rationale: Astrocytes are glial cells that support and maintain the blood-brain barrier,
regulate blood flow, and provide metabolic support to neurons. They also play a role in the repair
of brain tissue after injury.
6. In the autonomic nervous system (ANS), the parasympathetic nervous system primarily
uses which neurotransmitter?
A) Norepinephrine
B) Acetylcholine
C) Dopamine
D) Glutamate
Answer: B) Acetylcholine
Rationale: The parasympathetic nervous system primarily uses acetylcholine as its
neurotransmitter. This neurotransmitter is involved in promoting "rest-and-digest" functions,
such as lowering heart rate and promoting digestion.
7. A lesion in the broca’s area of the brain would result in which of the following?
A) Inability to understand speech
B) Inability to produce speech
C) Difficulty in regulating emotions
D) Loss of vision in the left visual field
,Answer: B) Inability to produce speech
Rationale: Broca’s area, located in the frontal lobe, is responsible for speech production. A
lesion in this area typically leads to non-fluent aphasia, where the individual has difficulty
speaking but can understand language.
8. The hippocampus plays a critical role in which of the following functions?
A) Balance and coordination
B) Memory formation
C) Visual processing
D) Language comprehension
Answer: B) Memory formation
Rationale: The hippocampus is involved in the consolidation of short-term memory into
long-term memory and plays a central role in spatial navigation and learning.
9. Which type of glial cell is primarily responsible for producing myelin in the central
nervous system (CNS)?
A) Schwann cells
B) Oligodendrocytes
C) Microglia
D) Astrocytes
Answer: B) Oligodendrocytes
Rationale: Oligodendrocytes are responsible for producing myelin in the central nervous
system (CNS). In contrast, Schwann cells produce myelin in the peripheral nervous system
(PNS).
10. A patient with multiple sclerosis (MS) would most likely show which of the following
symptoms?
A) Loss of coordination and muscle weakness
B) Severe headache and visual disturbances
C) Paralysis of the lower extremities
D) Seizures and altered mental status
Answer: A) Loss of coordination and muscle weakness
Rationale: Multiple sclerosis (MS) is an autoimmune disorder where the immune system
attacks the myelin sheath of neurons in the central nervous system, leading to loss of
coordination, muscle weakness, visual disturbances, and other neurological symptoms.
, 11. Which of the following is a primary function of the medulla oblongata?
A) Sensory perception
B) Autonomic control of breathing and heart rate
C) Memory consolidation
D) Emotional regulation
Answer: B) Autonomic control of breathing and heart rate
Rationale: The medulla oblongata is part of the brainstem and plays a critical role in regulating
vital autonomic functions, including breathing, heart rate, and blood pressure.
12. Which ion is primarily responsible for the depolarization phase of an action potential?
A) Sodium (Na+)
B) Potassium (K+)
C) Calcium (Ca2+)
D) Chloride (Cl-)
Answer: A) Sodium (Na+)
Rationale: During the depolarization phase of an action potential, sodium (Na+) ions rapidly
enter the neuron, causing the membrane potential to become more positive, leading to
depolarization.
13. What is the primary role of the somatic nervous system (SNS)?
A) To regulate involuntary functions such as heart rate and digestion
B) To control skeletal muscle movements and voluntary actions
C) To regulate glandular secretions
D) To manage reflexes and fight-or-flight responses
Answer: B) To control skeletal muscle movements and voluntary actions
Rationale: The somatic nervous system (SNS) is responsible for voluntary control of skeletal
muscles and the transmission of sensory information to the central nervous system.
14. In Alzheimer’s disease, which of the following is the most common pathological finding
in the brain?
A) Amyloid plaques and neurofibrillary tangles
B) Demyelination of neurons
C) Gliosis and edema
D) Neuronal loss in the basal ganglia
Questions With Complete Solutions
Course
NURS 5357
1. Which of the following structures is primarily responsible for the integration of sensory
input and motor output in the central nervous system (CNS)?
A) Brainstem
B) Thalamus
C) Spinal cord
D) Cerebellum
Answer: D) Cerebellum
Rationale: The cerebellum plays a critical role in the coordination of voluntary movements and
the integration of sensory input with motor output. It helps fine-tune motor actions by processing
information about body position and movement.
2. A patient presents with dysphagia (difficulty swallowing) and dysarthria (difficulty
speaking), which are symptoms of damage to which area of the brain?
A) Frontal lobe
B) Medulla oblongata
C) Parietal lobe
D) Temporal lobe
Answer: B) Medulla oblongata
Rationale: The medulla oblongata contains vital centers for autonomic functions, including
control of swallowing and speech. Damage to this area can impair dysphagia and dysarthria.
3. In a patient with Parkinson’s disease, which neurotransmitter is most significantly
deficient?
A) Acetylcholine
B) Dopamine
C) Serotonin
D) Norepinephrine
Answer: B) Dopamine
Rationale: Parkinson’s disease is caused by the degeneration of dopaminergic neurons in the
substantia nigra, resulting in a deficiency of dopamine in the brain. This neurotransmitter is
crucial for movement control, and its lack leads to the characteristic symptoms of tremors,
rigidity, and bradykinesia.
,4. Which of the following is the main role of the blood-brain barrier?
A) To protect the brain from mechanical injury
B) To allow the passage of most ions and neurotransmitters
C) To prevent harmful substances from entering the brain
D) To regulate the production of cerebrospinal fluid (CSF)
Answer: C) To prevent harmful substances from entering the brain
Rationale: The blood-brain barrier is a selective permeability barrier that protects the brain
from potentially harmful substances in the blood, such as pathogens and toxins, while allowing
the passage of essential nutrients and gases like oxygen.
5. What is the function of astrocytes in the central nervous system (CNS)?
A) To produce cerebrospinal fluid
B) To form myelin sheaths around neurons
C) To maintain the blood-brain barrier
D) To generate action potentials in neurons
Answer: C) To maintain the blood-brain barrier
Rationale: Astrocytes are glial cells that support and maintain the blood-brain barrier,
regulate blood flow, and provide metabolic support to neurons. They also play a role in the repair
of brain tissue after injury.
6. In the autonomic nervous system (ANS), the parasympathetic nervous system primarily
uses which neurotransmitter?
A) Norepinephrine
B) Acetylcholine
C) Dopamine
D) Glutamate
Answer: B) Acetylcholine
Rationale: The parasympathetic nervous system primarily uses acetylcholine as its
neurotransmitter. This neurotransmitter is involved in promoting "rest-and-digest" functions,
such as lowering heart rate and promoting digestion.
7. A lesion in the broca’s area of the brain would result in which of the following?
A) Inability to understand speech
B) Inability to produce speech
C) Difficulty in regulating emotions
D) Loss of vision in the left visual field
,Answer: B) Inability to produce speech
Rationale: Broca’s area, located in the frontal lobe, is responsible for speech production. A
lesion in this area typically leads to non-fluent aphasia, where the individual has difficulty
speaking but can understand language.
8. The hippocampus plays a critical role in which of the following functions?
A) Balance and coordination
B) Memory formation
C) Visual processing
D) Language comprehension
Answer: B) Memory formation
Rationale: The hippocampus is involved in the consolidation of short-term memory into
long-term memory and plays a central role in spatial navigation and learning.
9. Which type of glial cell is primarily responsible for producing myelin in the central
nervous system (CNS)?
A) Schwann cells
B) Oligodendrocytes
C) Microglia
D) Astrocytes
Answer: B) Oligodendrocytes
Rationale: Oligodendrocytes are responsible for producing myelin in the central nervous
system (CNS). In contrast, Schwann cells produce myelin in the peripheral nervous system
(PNS).
10. A patient with multiple sclerosis (MS) would most likely show which of the following
symptoms?
A) Loss of coordination and muscle weakness
B) Severe headache and visual disturbances
C) Paralysis of the lower extremities
D) Seizures and altered mental status
Answer: A) Loss of coordination and muscle weakness
Rationale: Multiple sclerosis (MS) is an autoimmune disorder where the immune system
attacks the myelin sheath of neurons in the central nervous system, leading to loss of
coordination, muscle weakness, visual disturbances, and other neurological symptoms.
, 11. Which of the following is a primary function of the medulla oblongata?
A) Sensory perception
B) Autonomic control of breathing and heart rate
C) Memory consolidation
D) Emotional regulation
Answer: B) Autonomic control of breathing and heart rate
Rationale: The medulla oblongata is part of the brainstem and plays a critical role in regulating
vital autonomic functions, including breathing, heart rate, and blood pressure.
12. Which ion is primarily responsible for the depolarization phase of an action potential?
A) Sodium (Na+)
B) Potassium (K+)
C) Calcium (Ca2+)
D) Chloride (Cl-)
Answer: A) Sodium (Na+)
Rationale: During the depolarization phase of an action potential, sodium (Na+) ions rapidly
enter the neuron, causing the membrane potential to become more positive, leading to
depolarization.
13. What is the primary role of the somatic nervous system (SNS)?
A) To regulate involuntary functions such as heart rate and digestion
B) To control skeletal muscle movements and voluntary actions
C) To regulate glandular secretions
D) To manage reflexes and fight-or-flight responses
Answer: B) To control skeletal muscle movements and voluntary actions
Rationale: The somatic nervous system (SNS) is responsible for voluntary control of skeletal
muscles and the transmission of sensory information to the central nervous system.
14. In Alzheimer’s disease, which of the following is the most common pathological finding
in the brain?
A) Amyloid plaques and neurofibrillary tangles
B) Demyelination of neurons
C) Gliosis and edema
D) Neuronal loss in the basal ganglia
