The process of moving sodium ions into the axon to

ATI LPN

ATI LPN Test Bank

The process of moving sodium ions into the axon to make the inside positive is called:

A. polarization B. depolarization C. repolarization D. hyperpolarization

Correct Answer: B

Rationale: Depolarization occurs as Na+ enters, making the inside positive. [Level: Knowledge]

Masses of gray matter deep in the cerebrum that help integrate motor commands are the:

A. limbic areas B. ventricles C. basal nuclei D. All of the above

Correct Answer: C

Rationale: Basal nuclei (ganglia) refine motor commands. [Level: Knowledge]

Identify the cranial nerve that has branches to serve internal organs:

A. trochlear B. trigeminal C. vagus D. hypoglossal

Correct Answer: C

Rationale: The vagus nerve (X) innervates thoracic/abdominal organs. [Level: Knowledge]

Which of the following is NOT an aging effect on the nervous system?

A. neurotransmitter production decreases B. neurological disorders increase C. brains lose neurons D. mental activities increase

Correct Answer: D

Rationale: Aging decreases mental activity capacity, not increases it. [Level: Comprehension]

The somatic nervous system is part of the:

A. autonomic nervous system B. peripheral nervous system C. central nervous system D. parasympathetic nervous system

Correct Answer: B

Rationale: The somatic system is a PNS subdivision, controlling voluntary movement. [Level: Knowledge]

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