Page 1 of 132
PHYS 261 Week 3 Nervous System Lab
Assignment Upload
Q1. Which part of a neuron receives signals from other neurons?
A) Axon
B) Cell body (soma)
C) Dendrites
D) Axon terminals
✅ Answer: C – Dendrites
Rationale: Dendrites are the primary receptive regions of a
neuron. They receive incoming signals from other neurons and
transmit them toward the cell body.
Q2. The structure that conducts electrical impulses away from the
neuron cell body is the:
A) Dendrite
B) Axon
,Page 2 of 132
C) Soma
D) Myelin sheath
✅ Answer: B – Axon
Rationale: The axon is a long, slender projection that conducts
action potentials away from the cell body toward other neurons,
muscles, or glands.
Q3. Which type of neuron has one axon and multiple dendrites?
A) Unipolar
B) Bipolar
C) Multipolar
D) Pseudounipolar
✅ Answer: C – Multipolar
Rationale: Multipolar neurons have one axon and two or more
dendrites. They are the most common type in the CNS (e.g.,
motor neurons, interneurons).
,Page 3 of 132
Q4. Bipolar neurons are typically found in:
A) Spinal cord
B) Retina of the eye and olfactory epithelium
C) Dorsal root ganglia
D) Skeletal muscle
✅ Answer: B – Retina of the eye and olfactory epithelium
Rationale: Bipolar neurons have one axon and one dendrite.
They are specialized sensory neurons found in the retina (bipolar
cells) and olfactory mucosa.
Q5. Pseudounipolar neurons are characteristic of:
A) Motor neurons
B) Autonomic ganglia
C) Dorsal root ganglia (sensory neurons)
D) Interneurons in the brain
, Page 4 of 132
✅ Answer: C – Dorsal root ganglia (sensory neurons)
Rationale: Pseudounipolar neurons have a single process that
splits into two branches. They are the primary sensory neurons in
dorsal root ganglia and cranial nerve ganglia.
Q6. The cell body of a neuron is also called the:
A) Axon hillock
B) Soma
C) Synaptic knob
D) Neurolemma
✅ Answer: B – Soma
Rationale: The soma (cell body) contains the nucleus and most
organelles. It is the metabolic center of the neuron.
Q7. Which glial cell produces the myelin sheath in the central
nervous system?
A) Schwann cell
PHYS 261 Week 3 Nervous System Lab
Assignment Upload
Q1. Which part of a neuron receives signals from other neurons?
A) Axon
B) Cell body (soma)
C) Dendrites
D) Axon terminals
✅ Answer: C – Dendrites
Rationale: Dendrites are the primary receptive regions of a
neuron. They receive incoming signals from other neurons and
transmit them toward the cell body.
Q2. The structure that conducts electrical impulses away from the
neuron cell body is the:
A) Dendrite
B) Axon
,Page 2 of 132
C) Soma
D) Myelin sheath
✅ Answer: B – Axon
Rationale: The axon is a long, slender projection that conducts
action potentials away from the cell body toward other neurons,
muscles, or glands.
Q3. Which type of neuron has one axon and multiple dendrites?
A) Unipolar
B) Bipolar
C) Multipolar
D) Pseudounipolar
✅ Answer: C – Multipolar
Rationale: Multipolar neurons have one axon and two or more
dendrites. They are the most common type in the CNS (e.g.,
motor neurons, interneurons).
,Page 3 of 132
Q4. Bipolar neurons are typically found in:
A) Spinal cord
B) Retina of the eye and olfactory epithelium
C) Dorsal root ganglia
D) Skeletal muscle
✅ Answer: B – Retina of the eye and olfactory epithelium
Rationale: Bipolar neurons have one axon and one dendrite.
They are specialized sensory neurons found in the retina (bipolar
cells) and olfactory mucosa.
Q5. Pseudounipolar neurons are characteristic of:
A) Motor neurons
B) Autonomic ganglia
C) Dorsal root ganglia (sensory neurons)
D) Interneurons in the brain
, Page 4 of 132
✅ Answer: C – Dorsal root ganglia (sensory neurons)
Rationale: Pseudounipolar neurons have a single process that
splits into two branches. They are the primary sensory neurons in
dorsal root ganglia and cranial nerve ganglia.
Q6. The cell body of a neuron is also called the:
A) Axon hillock
B) Soma
C) Synaptic knob
D) Neurolemma
✅ Answer: B – Soma
Rationale: The soma (cell body) contains the nucleus and most
organelles. It is the metabolic center of the neuron.
Q7. Which glial cell produces the myelin sheath in the central
nervous system?
A) Schwann cell
