In the following image of a lateral radiograph of the cervical part of the vertebral column, the arrow points to a fracture of the:
A) pars interarticularis of the axis (hangman's fracture).
B) posterior arch of the atlas.
C) lamina of the atlas.
D) spinous process of C3.
E) occipital condyles.
Ans: A
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How is the length of a skeletal muscle cell related to the force it can generate?
A. Skeletal muscle cells generate the most force when the contraction occurs at an intermediate length. B. The shorter a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. C. Skeletal muscle cells generate the same amount of force, regardless of their length. D. The longer a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. E. The tension in a skeletal muscle cell is greatest when contractions occur at either very short or very long lengths.
Immediately after an action potential has peaked, which cellular gates open?
A) sodium B) chloride C) calcium D) potassium
Bones are constantly undergoing resorption (breaking bone down) for various reasons. Which of the following cells accomplishes this process?
A) osteoblast B) stem cell C) osteoclast D) osteocyte
In the spinal cord, white matter is organized into
A. horns and the gray matter into roots. B. columns and the gray matter into horns. C. columns and the gray matter into tracts. D. horns and the gray matter into columns.