ATI RN
Questions About Nervous System Questions
Question 1 of 5
An autonomic involuntary response to a change is a(an)
Correct Answer: D
Rationale: A reflex is an involuntary, automatic response to a stimulus, often autonomic (e.g., pupil constriction).
Question 2 of 5
Neurons communicate with each other by releasing chemical messengers known as:
Correct Answer: C
Rationale: Neurotransmitters (e.g., dopamine) are chemicals released at synapses for neuron communication. Hormones are endocrine, antibodies immune, and enzymes catalyze.
Question 3 of 5
Which part of a neuron contains the nucleus and most of the cell's organelles?
Correct Answer: D
Rationale: The cell body (soma) contains the nucleus and organelles, integrating signals. Axon conducts, dendrite receives, and axon hillock initiates.
Question 4 of 5
Schwann cells play a crucial role in the process of:
Correct Answer: D
Rationale: Schwann cells aid peripheral nerve regeneration by clearing debris and guiding regrowth. Synaptic transmission is chemical, transport is axonal, neurogenesis is CNS.
Question 5 of 5
The rapid depolarization phase of an action potential is primarily due to:
Correct Answer: B
Rationale: Depolarization occurs due to Na+ influx through voltage-gated channels. K+ efflux is repolarization, Ca2+ is synaptic.