ATI RN
Questions About the Nervous System Questions
Question 1 of 5
All of the following are motor areas in the brain, except:
Correct Answer: D
Rationale: The premotor area (A, likely a typo), association motor areas (B, e.g., supplementary motor area), and frontal motor areas are motor regions. The temporal lobe (C) has some motor roles (e.g., speech), but the occipital lobe (D) is primarily visual, not motor. D is the exception.
Question 2 of 5
The fastest conduction of impulses occurs in nerves of type:
Correct Answer: B
Rationale: A-alpha fibers (B) are the fastest (70-120 m/s), myelinated, and large-diameter, used in motor and proprioception. C fibers (A) are slow (0.5-2 m/s), unmyelinated. A-beta (C) and A-delta (D) are intermediate. B is correct.
Question 3 of 5
The following is true about the frontal lobe of the brain:
Correct Answer: B
Rationale: The frontal lobe controls behavior (B, prefrontal), not taste (A, temporal), has motor areas (C, partial), and memory loss (D) is more temporal/hippocampal. B is most accurate.
Question 4 of 5
Aside from the nervous system, which other organ system develops out of the ectoderm?
Correct Answer: C
Rationale: The ectoderm gives rise to the nervous system and the integumentary system (skin, hair, nails) (C). The digestive (A) and respiratory (B) systems primarily develop from the endoderm, while the urinary (D) system arises from the mesoderm and endoderm. C is correct.
Question 5 of 5
What region of the spinal cord contains motor neurons that direct the movement of skeletal muscles?
Correct Answer: A
Rationale: The anterior horn (A) contains somatic motor neurons controlling skeletal muscles. The posterior horn (B) processes sensory input, lateral horn (C) houses autonomic neurons, and alar plate (D) is an embryonic term region, not adult structure. A is correct.