BIOL 322 Neuroscience: Comprehensive Final Examination 2026
Section 1: Foundational Concepts & Neuroanatomy (Questions 1-30)
1. Which of the following best defines the resting membrane potential of a typical neuron?
a) The membrane potential at which the neuron fires an action potential.
b) The voltage difference across the membrane when the cell is not transmitting signals.
c) The peak voltage reached during the depolarization phase of an action potential.
d) The membrane potential during the hyperpolarization phase.
ANSWER: b)
Rationale: The resting membrane potential is the stable voltage across the neuronal membrane when it
is not actively engaged in signaling. It is typically around -70 mV, maintained by the differential
distribution of ions and the selective permeability of the membrane.
2. The primary function of the myelin sheath is to:
a) Synthesize neurotransmitters.
b) Increase the speed of action potential propagation.
c) Provide metabolic support to the neuron's cell body.
d) Receive incoming synaptic signals.
ANSWER: b)
Rationale: Myelin acts as an electrical insulator, forcing the action potential to "jump" between the
Nodes of Ranvier in a process called saltatory conduction, which dramatically increases the speed of
signal transmission.
,3. Which glial cell type is responsible for forming the myelin sheath in the peripheral nervous system
(PNS)?
a) Astrocytes
b) Oligodendrocytes
c) Microglia
d) Schwann Cells
ANSWER: d)
Rationale: Schwann cells myelinate axons in the PNS. Oligodendrocytes perform the same function in
the central nervous system (CNS). Astrocytes provide structural and metabolic support, and microglia
are the immune cells of the CNS.
4. The central nervous system (CNS) is comprised of which two major structures?
a) The brain and the cranial nerves.
b) The spinal cord and the peripheral nerves.
c) The brain and the spinal cord.
d) The somatic and autonomic nervous systems.
ANSWER: c)
Rationale: The CNS is anatomically defined as the brain and the spinal cord. The PNS consists of all other
neural tissues, including cranial and spinal nerves.
5. A neuron that transmits signals from the CNS to a muscle is classified as a:
a) Sensory (afferent) neuron.
b) Interneuron.
c) Motor (efferent) neuron.
d) Projection neuron.
ANSWER: c)
,Rationale: Motor or efferent neurons carry signals away from the CNS to effectors like muscles and
glands. Sensory (afferent) neurons carry signals toward the CNS.
6. The gap between two communicating neurons is called the:
a) Node of Ranvier
b) Axon hillock
c) Synaptic cleft
d) Dendritic spine
ANSWER: c)
Rationale: The synaptic cleft is the tiny physical gap at a synapse where neurotransmitters are released
from the presynaptic neuron to act on the postsynaptic neuron.
7. Which lobe of the brain is primarily responsible for processing visual information?
a) Frontal lobe
b) Parietal lobe
c) Temporal lobe
d) Occipital lobe
ANSWER: d)
Rationale: The occipital lobe, located at the back of the brain, contains the primary visual cortex (V1)
and is dedicated to processing visual stimuli.
8. The "fight-or-flight" response is mediated by which division of the nervous system?
a) Somatic nervous system
b) Parasympathetic nervous system
c) Sympathetic nervous system
d) Enteric nervous system
ANSWER: c)
, Rationale: The sympathetic nervous system mobilizes the body's resources for emergency action (fight-
or-flight), increasing heart rate, dilating pupils, and diverting blood flow to muscles. The
parasympathetic system is responsible for "rest-and-digest."
9. Damage to the cerebellum would most likely result in:
a) Loss of vision.
b) Inability to understand language.
c) Problems with coordination and balance.
d) Loss of touch sensation.
ANSWER: c)
Rationale: The cerebellum is crucial for motor coordination, precision, and balance. Damage to it leads
to ataxia, characterized by uncoordinated movements.
10. The three main parts of the brainstem, from superior to inferior, are:
a) Medulla, Pons, Midbrain
b) Midbrain, Pons, Medulla
c) Pons, Midbrain, Medulla
d) Thalamus, Hypothalamus, Epithalamus
ANSWER: b)
Rationale: The brainstem is composed of the midbrain, pons, and medulla oblongata. It connects the
brain to the spinal cord and controls many vital autonomic functions.
11. Which structure is the primary relay station for sensory information (except smell) traveling to the
cerebral cortex?
a) Hypothalamus
b) Basal ganglia
c) Thalamus
Section 1: Foundational Concepts & Neuroanatomy (Questions 1-30)
1. Which of the following best defines the resting membrane potential of a typical neuron?
a) The membrane potential at which the neuron fires an action potential.
b) The voltage difference across the membrane when the cell is not transmitting signals.
c) The peak voltage reached during the depolarization phase of an action potential.
d) The membrane potential during the hyperpolarization phase.
ANSWER: b)
Rationale: The resting membrane potential is the stable voltage across the neuronal membrane when it
is not actively engaged in signaling. It is typically around -70 mV, maintained by the differential
distribution of ions and the selective permeability of the membrane.
2. The primary function of the myelin sheath is to:
a) Synthesize neurotransmitters.
b) Increase the speed of action potential propagation.
c) Provide metabolic support to the neuron's cell body.
d) Receive incoming synaptic signals.
ANSWER: b)
Rationale: Myelin acts as an electrical insulator, forcing the action potential to "jump" between the
Nodes of Ranvier in a process called saltatory conduction, which dramatically increases the speed of
signal transmission.
,3. Which glial cell type is responsible for forming the myelin sheath in the peripheral nervous system
(PNS)?
a) Astrocytes
b) Oligodendrocytes
c) Microglia
d) Schwann Cells
ANSWER: d)
Rationale: Schwann cells myelinate axons in the PNS. Oligodendrocytes perform the same function in
the central nervous system (CNS). Astrocytes provide structural and metabolic support, and microglia
are the immune cells of the CNS.
4. The central nervous system (CNS) is comprised of which two major structures?
a) The brain and the cranial nerves.
b) The spinal cord and the peripheral nerves.
c) The brain and the spinal cord.
d) The somatic and autonomic nervous systems.
ANSWER: c)
Rationale: The CNS is anatomically defined as the brain and the spinal cord. The PNS consists of all other
neural tissues, including cranial and spinal nerves.
5. A neuron that transmits signals from the CNS to a muscle is classified as a:
a) Sensory (afferent) neuron.
b) Interneuron.
c) Motor (efferent) neuron.
d) Projection neuron.
ANSWER: c)
,Rationale: Motor or efferent neurons carry signals away from the CNS to effectors like muscles and
glands. Sensory (afferent) neurons carry signals toward the CNS.
6. The gap between two communicating neurons is called the:
a) Node of Ranvier
b) Axon hillock
c) Synaptic cleft
d) Dendritic spine
ANSWER: c)
Rationale: The synaptic cleft is the tiny physical gap at a synapse where neurotransmitters are released
from the presynaptic neuron to act on the postsynaptic neuron.
7. Which lobe of the brain is primarily responsible for processing visual information?
a) Frontal lobe
b) Parietal lobe
c) Temporal lobe
d) Occipital lobe
ANSWER: d)
Rationale: The occipital lobe, located at the back of the brain, contains the primary visual cortex (V1)
and is dedicated to processing visual stimuli.
8. The "fight-or-flight" response is mediated by which division of the nervous system?
a) Somatic nervous system
b) Parasympathetic nervous system
c) Sympathetic nervous system
d) Enteric nervous system
ANSWER: c)
, Rationale: The sympathetic nervous system mobilizes the body's resources for emergency action (fight-
or-flight), increasing heart rate, dilating pupils, and diverting blood flow to muscles. The
parasympathetic system is responsible for "rest-and-digest."
9. Damage to the cerebellum would most likely result in:
a) Loss of vision.
b) Inability to understand language.
c) Problems with coordination and balance.
d) Loss of touch sensation.
ANSWER: c)
Rationale: The cerebellum is crucial for motor coordination, precision, and balance. Damage to it leads
to ataxia, characterized by uncoordinated movements.
10. The three main parts of the brainstem, from superior to inferior, are:
a) Medulla, Pons, Midbrain
b) Midbrain, Pons, Medulla
c) Pons, Midbrain, Medulla
d) Thalamus, Hypothalamus, Epithalamus
ANSWER: b)
Rationale: The brainstem is composed of the midbrain, pons, and medulla oblongata. It connects the
brain to the spinal cord and controls many vital autonomic functions.
11. Which structure is the primary relay station for sensory information (except smell) traveling to the
cerebral cortex?
a) Hypothalamus
b) Basal ganglia
c) Thalamus
