Myosin heads bind to _____, which they then pull and cause to slide toward the center of the sarcomere.
A. thin filaments
B. Z lines
C. sarcomeres
D. myofibrils
E. thick filaments
Answer: A. thin filaments
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The Cretaceous is the most recent period of the ____ era
a. Paleozoic b. Cenozoic c. Mesozoic d. Proterozoic e. Archaean
The smallest particles occurring in soil are referred to as
A) clay. B) gravel. C) sand. D) silt.
The best scientific explanation for differences in structure, function, and behavior found in different species or organisms is provided by
a. carbohydrate electrophoresis b. population chromatography c. the theory of carrying capacity d. the theory of evolution
Neurotransmitters are removed from the
synaptic cleft by
a. diffusion. b. enzymatic degradation. c. active pumping back into the neuron. d. all of these. e. b and c only