Oxygen is an excellent final electron acceptor because of its low electronegativity.
Answer the following statement true (T) or false (F)
False
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The first system in the body to become visibly differentiated during development is the
A. reproductive system. B. cardiovascular system. C. digestive system. D. respiratory system. E. nervous system.
During contraction of your arm muscle:a
the I band shortens. b. the H zone shortens. c. the A band shortens. d. the I band and the H zone shorten. e. the I band, the H zone, and the A band all shorten.
Based on the graph, how soon could another action potential be easily initiated (at the end of the relative refractory period) after the first stimulus?
A) less than 0.5 msec B) 1 msec C) 2 msec D) 3 msec E) 4 msec
Despite being correct about the first two tenets of the Cell Theory, Schleiden and Schwann made an error about another central feature of cells. What was their error?
A) they both agreed that cells could arise from noncellular materials B) they stated that all cells were immortal C) They claimed that all cells had nuclei through their entire existence D) They claimed that all cells were exactly the same in every detail E) They stated that all cells were smaller than 2 micro in diameter