As muscles contract, ________
a. actin heads bind to myosin filaments and slide them toward the middle of the sarcomere
b. myosin heads bind to actin filaments and slide them toward the middle of the sarcomere
c. myosin filaments change position
d. filaments change length
b
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All environments have both ____ and ____ components
a. hydrospheric; lithospheric b. lithospheric; atmospheric c. ecologic; atmospheric d. biotic; abiotic e. organismal; ecologic
Cultures of a bacterial strain were incubated in a refrigerator (5°C), on a lab bench (22°C), in a 37°C incubator, and in a 50°C incubator. After incubation, there was no growth at 37°C and 50°C, slight growth in the refrigerator, and abundant growth on the lab bench top. Which term best describes this organism?
A. Capnophile B. Mesophile C. Halophile D. Psychrotroph E. Anaerobe
Where are the sensory receptors for equilibrium located?
A) on the surface of the skin B) in the inner ear C) in the joints D) in the retina of the eye
Mitochondria play an important role in cell necrosis
__________________ Indicate whether the statement is true or false.