13. Humans have approximatelymuscles controlling more than A) 200, 400 B) 600, 2

Question

13. Humans have approximatelymuscles controlling more than A) 200, 400 B) 600, 200 C) 400, 200 D) 200, 600 14. The fibers of the corticospinal tract that cross over the midline at the medulla A) Cross back over at the level of the spinal cord B) Control movement of the distal limbs and digits C) Control movement of the core muscles along the midline of the body D) Control movement of the facial muscles 15. The lower motor neurons exist in the gray matter of the spinal cord, specifically in the A) anterior horn B) posterior horn C) ventral horn D) dorsal horn 16. The roots of the spinal cord carry sensory, or afferent, information. A) dorsal B) ventral C) anterior D) posterior 17. The plays a key role in self-initiated movements and not responses triggered by external events. A) supplementary motor complex B) accessory motor complex C) corticofugal pathway D) retrosplenial complex 18. The communicate(s) regularly with the cerebral cortex to contribute to efficient execution of appropriate movements. A) supplementary motor complex B) accessory motor complex C) basal ganglia D) amygdala

Explanation / Answer

ANSWER 13 :

(B) option is correct.

Humans have approximately 600 muscles controlling more than 200 joints in their whole body .

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