What structural component in skeletal and cardiac muscle conducts action potentials from the outer surface of the muscle fiber inside to the myofibrils?
A. transverse tubule
B. actin
C. troponin
D. tropomyosin
E. None of the answers are correct.
Answer: A
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Hibernation in small mammals is an example of what specific phenomenon?
A. sleep B. rest C. torpor D. hiding E. activity
Slow-growing NTM whose colonies produce no pigment, whether they are grown in the dark or the light, are referred to as:
a. scotochromogens. b. photochromogens. c. nonphotochromogens. d. chromogenicums.
The bacterial viruses that are released by a process termed extrusion are called
A. lysogenic viruses. B. temperate phages. C. filamentous phages. D. lambda viruses.
Ectothermic animals:a
depend on heat from the external environment to adjust their body temperatures. b. may dilate blood vessels to increase blood flow and heat to the skin. c. maintain a relatively constant body temperature despite external temperatures. d. may have feathers to keep them insulated. e. may have body fat to keep them insulated.