Skin cells that undergo random changes as a person ages provide an example of a(n) _____ mutation.?
A) ?chromosomal
B) ?gene
C) ?somatic
D) ?inherited
B
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Shortened ________ shorten many muscle fibers to cause a muscle to contract.
A. sarcomeres B. myosin C. actin D. Z lines
On which side of the pH scale do household cleaners such as bleach and ammonia belong?
A) Concentrated B) Basic C) Neutral D) Acidic
The sternoclavicular joint is a saddle joint with a _______ range of movement
A. wide B. narrow
What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
A) Diffusion of ions along the axoplasm is faster. B) There are no internodes in unmyelinated fibers. C) There are more internodes in unmyelinated fibers. D) Facilitated diffusion of sodium and potassium is faster in myelinated fibers. E) Active transport of sodium and potassium is faster in myelinated fibers.