During the course of a ride on a roller coaster, what would be FALSE regarding your heart?
A. An increase in heart rate
B. A decrease in the slope of the pacemaker potential
C. An increase in the rate of cross-bridge cycling in ventricular muscle cells
D. An increase in the amount of Ca2+ entering cardiac muscle cells
E. A decrease in the duration of systole
Answer: B
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Cells that are thick in the middle and tapered toward the ends are called ________ cells.
A. columnar B. stellate C. spheroid D. squamous E. fusiform
What is the fibrous covering on the surface of bone that is involved in thickening of the bone called?
a) periosteum b) endosteum c) marrow d) epiphysis e) metaphysis
The part of the tRNA that binds mRNA is the anticodon.
Answer the following statement true (T) or false (F)
Atomic radiation is useful for treating cancer because
A) radiation affects cancer cells but not normal cells. B) radiation protects normal cells against the effects of cancer. C) normal cells are not affected by radiation. D) radiation harms cancer cells more readily than it does most non-cancer cells.