At the splenic flexure, the colon becomes the
A) ascending colon.
B) transverse colon.
C) descending colon.
D) sigmoid colon.
E) rectum.
C
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A strain is a tear or injury in muscles or ________.
A. nerve fibers B. cartilage C. ligaments D. tendons
Answer the following statements true (T) or false (F)
1. The ciliary body attaches to and adjusts the lens. 2. The iris is the colored portion of the eye that surrounds the pupil. 3. The insertion point for extraocular muscles is the sclera. 4. The sclera contains blood vessels that nourish the deep portion of the retina. 5. Lens contains highly organized collagen fibers causing it to be transparent.
One extracellular messenger molecule can ultimately influence the activity of only one protein molecule within the cell
Indicate whether the statement is true or false
Physical evidence that supports the sliding filament theory of muscle contraction includes
A) Increased width of the H band during contraction. B) Decreased distance between Z lines during contraction. C) Increased width of the I band during contraction. D) Decreased width of the A band during contraction. E) An increased distance between Z lines during contraction.