ATI RN
Questions About the Nervous System Questions
Question 1 of 5
In an analogy, if an organism is a book and a cell is an individual word, then organs are
Correct Answer: A
Rationale: Organs are like chapters, each a major functional unit contributing to the organism (book). Cells are words, tissues are sentences, and organ systems are sections.
Question 2 of 5
If the axon of a neuron were destroyed, which of the following would happen to the neuron?
Correct Answer: A
Rationale: The axon transmits action potentials; its destruction prevents signal propagation. Neurons have one axon, and dendrites receive stimuli, so only transmission is affected.
Question 3 of 5
Neuron A has a diameter that is twice that of Neuron B. Based only on this information, which of the following is true?
Correct Answer: C
Rationale: Larger diameter axons (Neuron A) have lower resistance, transmitting action potentials faster. Strength is all-or-none, not diameter-dependent.
Question 4 of 5
A defect in forming which of the following would mean neurons could not be properly supported by astrocytes?
Correct Answer: C
Rationale: Astrocytes help form and maintain the blood-brain barrier, supporting neurons by regulating blood-neuron interactions. Myelin is from oligodendrocytes, neurofibrils are structural, and synapses are junctions.
Question 5 of 5
Neurons that transmit nerve impulses from receptors to the central nervous system are neurons.
Correct Answer: C
Rationale: Sensory neurons (afferent) transmit impulses from receptors to the CNS. Interneurons connect within the CNS, motor neurons (efferent) signal effectors, and unipolar is a structural type.