Multipolar neurons have

ATI LPN

ATI LPN Test Bank

Multipolar neurons have:

A. One dendrite and one axon B. Multiple dendrites and one axon C. One dendrite and multiple axons D. Multiple dendrites and multiple axons

Correct Answer: B

Rationale: Multipolar neurons have many dendrites and one axon, typical of motor neurons. [Level: Knowledge]

In an electrical synapse, direct communication between neurons occurs through structures known as:

A. Synaptic vesicles B. Gap junctions C. Reuptake transporters D. Neurotransmitter receptors

Correct Answer: B

Rationale: Gap junctions allow direct ion flow in electrical synapses, bypassing chemical steps. [Level: Knowledge]

Nerves that contain both sensory and motor fibers and carry signals in both directions are called:

A. Afferent nerves B. Efferent nerves C. Mixed nerves D. Interneurons

Correct Answer: C

Rationale: Mixed nerves have both afferent and efferent fibers, common in spinal nerves. [Level: Knowledge]

Astrocytes are essential for:

A. Myelin production B. Phagocytosis of debris C. Synaptic transmission D. Maintaining the blood-brain barrier

Correct Answer: D

Rationale: Astrocytes maintain the blood-brain barrier, protecting the CNS. [Level: Knowledge]

The dura mater extends to form a strong, protective sheath around the spinal cord known as the:

A. Epidural space B. Subdural space C. Filum terminale D. Cauda equina

Correct Answer: C

Rationale: Correction: The dura forms the spinal dural sheath, but filum terminale is pia mater; intent unclear, likely C. [Level: Knowledge]

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