ATI RN
Questions About the Nervous System Questions
Question 1 of 5
A graded potential that makes the membrane potential more negative, inhibiting an action potential.
Correct Answer: B
Rationale: A hyperpolarizing graded potential (e.g., IPSP) makes the membrane more negative, reducing the likelihood of an action potential. Depolarizing is excitatory, others are incorrect terms.
Question 2 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 3 of 5
The neuronal Nissl bodies are
Correct Answer: B
Rationale: Nissl bodies are rough endoplasmic reticulum in neurons, synthesizing proteins. Mitochondria produce energy, lysosomes degrade waste, and Golgi processes proteins.
Question 4 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 5 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.