BIOD 322 NEUROSCIENCE
Anatomy
Latest Review Exam
Q&A
2024
,1. Which part of the neuron is responsible for receiving signals?
A. Axon
B. Dendrite
C. Soma
D. Myelin Sheath
Answer: B. Dendrite
Rationale: Dendrites are tree-like extensions at the beginning of a
neuron that help to increase the surface area of the cell body and are
typically where signals are received from other neurons.
2. What is the primary function of the myelin sheath?
A. To generate electrical impulses
B. To receive neurotransmitters
C. To protect and insulate axons
D. To regulate ion concentrations
Answer: C. To protect and insulate axons
Rationale: The myelin sheath is a fatty layer that covers the axons of
many neurons. It acts as an insulator to increase the speed at which
electrical impulses propagate along the nerve cell.
3. Which structure is not part of the central nervous system?
A. Brain
B. Spinal Cord
C. Ganglion
D. Medulla Oblongata
Answer: C. Ganglion
Rationale: The central nervous system consists of the brain and spinal
cord. A ganglion is a structure containing a number of nerve cell bodies,
typically linked by synapses, and is part of the peripheral nervous system.
4. What type of cells form the blood-brain barrier?
A. Astrocytes
B. Oligodendrocytes
C. Microglia
D. Ependymal cells
Answer: A. Astrocytes
Rationale: Astrocytes are star-shaped glial cells in the brain and spinal
, cord that have many functions, including the formation of the blood-brain
barrier, which controls the passage of substances from the bloodstream
into the central nervous system.
5. The resting membrane potential is primarily determined by the
concentration of which ion?
A. Sodium (Na+)
B. Potassium (K+)
C. Calcium (Ca2+)
D. Chloride (Cl-)
Answer: B. Potassium (K+)
Rationale: The resting membrane potential is mainly set by the
concentration gradient of potassium ions, which move out of the cell
through potassium channels, leading to a negative charge inside the cell.
6. What is the role of neurotransmitters in synaptic transmission?
A. They generate electrical impulses in the neuron.
B. They diffuse across the synaptic cleft to transmit a signal to the next
neuron.
C. They create the myelin sheath around the axon.
D. They are involved in the digestion of cellular waste.
Answer: B. They diffuse across the synaptic cleft to transmit a signal to
the next neuron.
Rationale: Neurotransmitters are chemical messengers that cross the
synaptic gaps between neurons. When released from the neuron, they
travel across the synapse and bind to receptor sites on the receiving
neuron, thereby influencing whether that neuron will generate a neural
impulse.
7. Which area of the brain is primarily involved in the regulation of
balance and coordination?
A. Cerebrum
B. Cerebellum
C. Hypothalamus
D. Thalamus
Answer: B. Cerebellum
Rationale: The cerebellum is a region of the brain that plays an
important role in motor control. It is also involved in some cognitive
Anatomy
Latest Review Exam
Q&A
2024
,1. Which part of the neuron is responsible for receiving signals?
A. Axon
B. Dendrite
C. Soma
D. Myelin Sheath
Answer: B. Dendrite
Rationale: Dendrites are tree-like extensions at the beginning of a
neuron that help to increase the surface area of the cell body and are
typically where signals are received from other neurons.
2. What is the primary function of the myelin sheath?
A. To generate electrical impulses
B. To receive neurotransmitters
C. To protect and insulate axons
D. To regulate ion concentrations
Answer: C. To protect and insulate axons
Rationale: The myelin sheath is a fatty layer that covers the axons of
many neurons. It acts as an insulator to increase the speed at which
electrical impulses propagate along the nerve cell.
3. Which structure is not part of the central nervous system?
A. Brain
B. Spinal Cord
C. Ganglion
D. Medulla Oblongata
Answer: C. Ganglion
Rationale: The central nervous system consists of the brain and spinal
cord. A ganglion is a structure containing a number of nerve cell bodies,
typically linked by synapses, and is part of the peripheral nervous system.
4. What type of cells form the blood-brain barrier?
A. Astrocytes
B. Oligodendrocytes
C. Microglia
D. Ependymal cells
Answer: A. Astrocytes
Rationale: Astrocytes are star-shaped glial cells in the brain and spinal
, cord that have many functions, including the formation of the blood-brain
barrier, which controls the passage of substances from the bloodstream
into the central nervous system.
5. The resting membrane potential is primarily determined by the
concentration of which ion?
A. Sodium (Na+)
B. Potassium (K+)
C. Calcium (Ca2+)
D. Chloride (Cl-)
Answer: B. Potassium (K+)
Rationale: The resting membrane potential is mainly set by the
concentration gradient of potassium ions, which move out of the cell
through potassium channels, leading to a negative charge inside the cell.
6. What is the role of neurotransmitters in synaptic transmission?
A. They generate electrical impulses in the neuron.
B. They diffuse across the synaptic cleft to transmit a signal to the next
neuron.
C. They create the myelin sheath around the axon.
D. They are involved in the digestion of cellular waste.
Answer: B. They diffuse across the synaptic cleft to transmit a signal to
the next neuron.
Rationale: Neurotransmitters are chemical messengers that cross the
synaptic gaps between neurons. When released from the neuron, they
travel across the synapse and bind to receptor sites on the receiving
neuron, thereby influencing whether that neuron will generate a neural
impulse.
7. Which area of the brain is primarily involved in the regulation of
balance and coordination?
A. Cerebrum
B. Cerebellum
C. Hypothalamus
D. Thalamus
Answer: B. Cerebellum
Rationale: The cerebellum is a region of the brain that plays an
important role in motor control. It is also involved in some cognitive
