ATI RN
Nervous System Questions Questions
Question 1 of 5
When is the transmission of signal electrical?
Correct Answer: A
Rationale: Signal transmission along the axon (A) is electrical due to action potentials (changes in membrane potential). Between neurons (B), transmission is typically chemical via synapses. 'Never' (C) and 'always' (D) are incorrect, as transmission is context-dependent—electrical within a neuron, chemical between neurons.
Question 2 of 5
Which of the following statements is true?
Correct Answer: C
Rationale: Theta waves are 4-7 Hz (not 1-3, ruling out A), alpha waves appear by 3-4 months (not after 4 years, ruling out B), sensory memory recall lasts seconds (C is true), and REM sleep cycles are ~10-20 minutes, not 30 (D). C is correct.
Question 3 of 5
Ipsilateral cervical cord compression at C6/C7 level causes:
Correct Answer: A
Rationale: C6/C7 compression affects the triceps reflex (C7, A, correct) ipsilaterally. Hyperalgesia below (B) suggests spinothalamic damage, but ipsilateral pain loss is more likely. Vibration sense (C) is contralateral via dorsal columns, but incomplete here. Knee jerk (L3-L4, D) is unaffected. A is most specific.
Question 4 of 5
Which of the following is a basal ganglia function:
Correct Answer: B
Rationale: The basal ganglia initiate and modulate movements (B, correct), not fine skill (A, cerebellum), equilibrium (C, cerebellum), or speech motor control (D, partial frontal/basal role). B is primary.
Question 5 of 5
Signs of cerebellar dysfunction include:
Correct Answer: B
Rationale: Cerebellar dysfunction causes past pointing (B, ataxia), hypotonia (not A), wide-based gait (not shuffling, C), and intention tremor (not resting, D). B is correct.