ATI RN
Questions About Nervous System Questions
Question 1 of 5
Synapse from axon to cell body.
Correct Answer: C
Rationale: An axosomatic synapse occurs from an axon to a neuron’s cell body. Oligodendrocytes are glia, agonist is a drug term, and SNS is a system.
Question 2 of 5
One of the two main subdivisions of the autonomic nervous system, having cell bodies of preganglionic neurons in nuclei in the brainstem and in the lateral gray horn of the sacral portion of the spinal cord.
Correct Answer: A
Rationale: The parasympathetic nervous system (craniosacral) conserves energy, with preganglionic neurons in the brainstem and sacral cord. Agonist is a drug term, divergence is a synapse pattern, and sensory neurons are afferent.
Question 3 of 5
Which of the following neurotransmitters is only excitatory?
Correct Answer: C
Rationale: Glutamate is the primary excitatory neurotransmitter in the CNS, always depolarizing postsynaptic neurons. Glycine and GABA are inhibitory, and norepinephrine has mixed effects.
Question 4 of 5
When a person jerks his hand away from a hot stove, the movement is directly stimulated by
Correct Answer: A
Rationale: Jerking away from a hot stove is a spinal reflex (e.g., withdrawal reflex), mediated by sensory neurons, interneurons, and motor neurons in the spinal cord, bypassing higher brain centers for speed.
Question 5 of 5
The autonomic nervous system mediates two types of responses in the body.
Correct Answer: C
Rationale: The autonomic nervous system mediates fight-or-flight (sympathetic) and rest-and-digest (parasympathetic) responses, regulating involuntary functions like heart rate and digestion.