Which nerve arises from the brachial plexus?
A) Vagus
B) Obturator
C) Phrenic
D) Musculocutaneous
Answer: D
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The cervical spinal cord
A) is smaller in diameter than other regions of the spinal cord. B) contains a smaller amount of gray matter than in other areas of the spinal cord. C) supplies the shoulder girdle and upper limb. D) All of the answers are correct. E) None of the answers are correct.
Which of the following statements concerning membrane transport across the plasma membrane is true?
A. Lipid-soluble substances pass through the membrane by dissolving in the lipid bilayer. B. Generally, cations pass through the membrane more easily than anions. C. Water cannot move through the membrane. D. All molecules are moved across by active transport. E. Polar molecules are transported more easily than nonpolar molecules.
Which of the following is not a use of X-ray imaging?
A. breast cancer screening in mammography B. upper digestive tract abnormalities following barium ingestion C. brain tumor progression D. vertebrae fractures
The sodium chloride molecule breaks apart in water. What does "E" represent (the process)?
A. chloride ion B. dissociation C. water molecule D. sodium ion E. salt crystal