The region between two adjacent Z lines is a
a. muscle fiber.
b. sarcomere.
c. tendon.
d. ligament.
e. myofibril.
B
Biology & Microbiology
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Which of the following adversely affects the ozone layer?
A. oil B. plastics C. coal and natural gas D. greenhouse gases E. chlorofluorocarbons
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In mammalian kidneys, blood in the vasa recta and fluid in the loop of Henle flow in opposite directions to create a ________ multiplier system.
A. reversible B. stepped C. exponential D. homeostatic E. countercurrent
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The stimulation of a motor neuron ultimately results in the release of a neurotransmitter at the synapse between the neuron and a muscle cell. What type of neurotransmitter is used at these neuromuscular junctions?
(a) acetylcholine (b) glutamate (c) GABA (d) glycine
Biology & Microbiology