When a skeletal muscle fiber contracts:
A) the A bands shorten while the I bands lengthen.
B) the H zone and I bands narrow.
C) the H zone narrows while the I bands widen.
D) Z discs move farther apart while the A bands shorten.
Answer: B
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When activated, lysosomes may function in
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Elements in the first column of the periodic table contain one electron in their outer shell.
Indicate whether this statement is true or false.
A major role of the lymphoid system is to produce, maintain, and distribute ________.
Fill in the blank(s) with the appropriate word(s).