ATI LPN
Medical Surgical Nursing Neurological Disorders Questions
Question 1 of 5
The three main anatomical neural planes are:
Correct Answer: D
Rationale: Neural planes: sagittal (side), coronal (front), horizontal (top). [Level: Knowledge]
Question 2 of 5
Which ion has the greatest electrochemical driving force in a typical neuron with a resting membrane potential of -65 millivolts?
Correct Answer: C
Rationale: The electrochemical driving force (V_DF) for an ion is calculated as V_DF = V_m - V_eq. For sodium, V_eq is +62 mV, so V_DF = -65 - 62 = -127 mV (inward). For potassium, V_eq is -86 mV, so V_DF = +21 mV (outward). For chloride, V_eq is -70 mV, so V_DF = +5 mV (outward). Sodium has the greatest driving force. TMP13 pp. 587-588
Question 3 of 5
The excitatory or inhibitory action of a neurotransmitter is determined by which of the following?
Correct Answer: A
Rationale: The postsynaptic receptor determines whether a neurotransmitter excites or inhibits. TMP13 p. 582
Question 4 of 5
Which structure carries axons from neurons in the ventral posterolateral nucleus of the thalamus to the primary somatosensory cortex?
Correct Answer: C
Rationale: The internal capsule conveys axons from the ventral posterolateral nucleus to the somatosensory cortex. TMP13 p. 610
Question 5 of 5
Vibratory sensation depends on the detection of rapidly changing, repetitive sensations. The high-frequency end of the repetitive stimulation scale is detected by which structure?
Correct Answer: C
Rationale: Pacinian corpuscles detect high-frequency vibrations. TMP13 p. 608