ATI LPN
Neurology Exam Questions Questions
Question 1 of 5
Neurotransmitters that open Na⁺ channels and trigger action potentials in receiving cells are called
Correct Answer: C
Rationale: Excitatory neurotransmitters (e.g., glutamate) depolarize the postsynaptic membrane by opening Na⁺ channels, increasing the likelihood of an action potential.
Question 2 of 5
Which of the following brain regions controls the secretion of pituitary hormones and exerts direct control over many other aspects of homeostasis?
Correct Answer: B
Rationale: The hypothalamus regulates pituitary hormone release and homeostasis (e.g., temperature, hunger).
Question 3 of 5
The nervous system is the centre of all mental activity including all the following except
Correct Answer: C
Rationale: The nervous system governs mental activities like thinking, learning, and memory, but digestion is primarily controlled by the enteric nervous system and autonomic regulation, not mental activity.
Question 4 of 5
The Schwann cells form a myelin sheath around the:
Correct Answer: D
Rationale: Schwann cells wrap around axons in the PNS to form a myelin sheath, enhancing impulse conduction, not around dendrites, cell bodies, or nodes.
Question 5 of 5
Which of the following is the correct sequence in a typical reflex arc:
Correct Answer: B
Rationale: A reflex arc sequence is: receptor detects stimulus, afferent neuron to CNS (integration center), efferent neuron to effector.