Involuntary motor commands, such as those for refl

ATI LPN

ATI LPN Test Bank

Involuntary motor commands, such as those for reflexes, involve:

A. A single synapse B. Two synapses C. Three synapses D. Four synapses

Correct Answer: A

Rationale: Monosynaptic reflexes (e.g., stretch) involve one synapse (sensory to motor). [Level: Knowledge]

The cervical plexus is formed by the spinal nerves from which spinal levels?

A. C1 to C4 B. C5 to C8 C. C1 to C8 D. C7 to T1

Correct Answer: A

Rationale: The cervical plexus arises from C1-C4 spinal nerves. [Level: Knowledge]

The cell bodies of sympathetic preganglionic neurons are located in the:

A. Spinal cord (thoracic and lumbar regions) B. Brainstem C. Autonomic ganglia D. Sympathetic chain ganglia

Correct Answer: A

Rationale: Sympathetic preganglionic cell bodies are in the thoracic/lumbar spinal cord (T1-L2). [Level: Knowledge]

Dementia is a syndrome characterized by:

A. Temporary memory loss B. Progressive decline in cognitive function affecting daily life C. Impaired motor skills D. Acute episodes of confusion

Correct Answer: B

Rationale: Dementia involves chronic, progressive cognitive decline impacting daily function. [Level: Knowledge]

Chemical messengers that allow neurons to communicate with other cells are called:

A. axons B. myelin C. neurotransmitters D. neuroglia

Correct Answer: C

Rationale: Neurotransmitters enable chemical communication across synapses. [Level: Knowledge]

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