ATI RN
Nervous System Multiple Choice Questions and Answers Questions
Question 1 of 5
Specialized hypothalamic neuron that secretes a hormone into blood capillaries of the posterior pituitary.
Correct Answer: D
Rationale: Neurosecretory cells in the hypothalamus release hormones (e.g., oxytocin, ADH) into the posterior pituitary’s capillaries. Interneurons connect neurons, neurology is a field, and spinal nerves are PNS.
Question 2 of 5
A neuroglial cell that supports neurons and produces a myelin sheath around axons of neurons of the central nervous system.
Correct Answer: A
Rationale: Oligodendrocytes in the CNS myelinate axons, supporting signal conduction. ACh is a neurotransmitter, white matter is axons, and action potential is a signal.
Question 3 of 5
The part of the peripheral nervous system that regulates involuntary responses, such as those of cardiac muscle, smooth muscle, and glands.
Correct Answer: A
Rationale: The autonomic nervous system (ANS) regulates involuntary functions (e.g., heart rate, digestion). Nerve action potential is a signal, astrocytes are glia, and enteric is an ANS subdivision.
Question 4 of 5
An electrical signal that propagates along the membrane of a neuron or muscle fiber; a rapid change in membrane potential that involves a depolarization followed by a repolarization.
Correct Answer: A
Rationale: An action potential (AP) is the electrical signal (depolarization-repolarization) in neurons or muscles. Nerve and muscle action potentials are specific types, and synaptic potential is graded.
Question 5 of 5
One of the two main subdivisions of the autonomic nervous system; prepares the body for intense physical activity.
Correct Answer: A
Rationale: The sympathetic nervous system prepares the body for fight-or-flight (intense activity). Parasympathetic conserves energy, ANS is broader, and enteric controls digestion.