ATI RN
Test Questions on Autonomic Nervous System Questions
Question 1 of 5
Atropine (which blocks muscarinic receptors) is liable to cause:
Correct Answer: B
Rationale: Atropine blocks parasympathetic muscarinic receptors, reducing vagal tone and increasing heart rate. Salivation and intestinal activity decrease, cardiac strength is unaffected.
Question 2 of 5
The basic unit of the nervous system is the:
Correct Answer: C
Rationale: The neuron is the fundamental structural and functional unit of the nervous system, encompassing axons, dendrites, and cell body. Synapses are junctions between neurons.
Question 3 of 5
The transmitter substance in the presynaptic neuron is contained in the:
Correct Answer: B
Rationale: Neurotransmitters (e.g., acetylcholine) are stored in synaptic vesicles (neuron vesicles) in the presynaptic terminal, released into the cleft upon signal.
Question 4 of 5
The tightly packed coil of the Schwann cell plasma membrane that encircles certain kinds of axons is called:
Correct Answer: A
Rationale: The myelin sheath is formed by Schwann cells (PNS) wrapping around axons. Neurilemma is the outer Schwann cell layer, nodes are gaps, gray matter is unmyelinated.
Question 5 of 5
Which of the following is in the peripheral nervous system?
Correct Answer: D
Rationale: Satellite cells are PNS glial cells supporting neuron cell bodies in ganglia. The others are CNS-specific (oligodendrocytes myelinate, ependymal line ventricles, microglia are immune).