ATI RN
Questions About Nervous System Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The small gap between the presynaptic and postsynaptic neurons is known as the:
Correct Answer: B
Rationale: The synaptic cleft is the gap where neurotransmitters diffuse. Vesicles store, transporters reuptake, receptors bind. (Q37 options incomplete, corrected.)
Question 5 of 5
The lateral ventricles are located within the cerebral hemispheres and are connected to the third ventricle by the:
Correct Answer: A
Rationale: The interventricular foramen connects lateral ventricles to the third. Aqueduct links third to fourth, canal is spinal, magnum is skull exit.