Magnetic resonance imaging might be used to
A) do all of the above.
B) obtain a sectional view of the brain.
C) examine an injured knee.
D) distinguish between normal and cancerous tissue.
A
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The number of atoms in exactly 12 grams of carbon-12 is called ________ number.
A. Avogadro's B. Socrates's C. Pasteur's D. Dalton's E. Le Chatelier's
All of the following air-filled bony cavities have an opening into the nasal cavity EXCEPT the
A. sphenoid sinus. B. ethmoidal air cells. C. mastoid air cells. D. maxillary sinus. E. frontal sinus.
Which of the following is true about skeletal muscle?
A. Sensory neurons stimulate muscles to contract. B. There are very few blood vessels in skeletal muscle. C. Every muscle fiber receives a branch of an axon from the nerve. D. There are very few nerve fibers in a muscle. E. All of these are true.
Which of the following is an example of chemical digestion?
A. Grinding food into smaller pieces. B. Food stays in the mouth long enough for glycogen to be broken down and absorbed. C. An enzyme hydrolyzes bonds between glucose molecules. D. Segmentation in the small intestine.