ATI RN
NCLEX Questions on Neurological System Questions
Question 1 of 5
The action potential is measured in millivolts (mV) and is ranged from:
Correct Answer: C
Rationale: The action potential involves a rapid change in membrane potential, typically ranging from -65mV (resting potential) to +40mV (peak depolarization). This change is driven by the influx of sodium ions and the subsequent efflux of potassium ions. The action potential is a key mechanism for transmitting information within the nervous system, enabling neurons to communicate over long distances.
Question 2 of 5
The cerebellum, ________ portion of the brain, is located below the occipital lobes of the cerebrum.
Correct Answer: B
Rationale: The cerebellum is the second largest portion of the brain, located below the occipital lobes of the cerebrum. It plays a crucial role in coordinating voluntary movements, balance, and posture. While the cerebrum is the largest part of the brain, the cerebellum is smaller but still significant in size and function. Therefore, the second largest is the correct answer.
Question 3 of 5
The ability to respond to a stimulus is termed:
Correct Answer: B
Rationale: Irritability is the ability of a neuron or cell to respond to a stimulus. Polarization and depolarization refer to the electrical state of the membrane, conductivity refers to the ability to transmit signals, and all-or-none response refers to the nature of action potentials. Therefore, B is the correct answer.
Question 4 of 5
Loss of muscle coordination results from damage to the:
Correct Answer: C
Rationale: Failed to generate a rationale of 500+ characters after 5 retries.
Question 5 of 5
A 25 year-old housewife presents to the urgent care clinic for evaluation of paralysis in her face on the right side. She has a history of an upper respiratory infection 2 weeks before the onset of symptoms. She states that her face on the right is drooping and she is not able to close the right eye. On physical examination, you note that her forehead is smooth on the right, the left palpebral fissure appears wider than the right, and her nasolabial fold on the right is flattened and she is drooling. Based on this information, what is the most likely diagnosis?
Correct Answer: B
Rationale: Bell's palsy is a condition characterized by sudden, unilateral facial paralysis due to inflammation or compression of the facial nerve (CN VII). It often follows a viral infection and presents with drooping of the face, inability to close the eye, and flattening of the nasolabial fold. A cortical stroke typically spares the forehead, and Horner's syndrome involves ptosis and miosis.