Choose the pencil that has the lowest potential energy
A) A pencil on your desk
B) A pencil falling from your desk
C) A pencil hitting the ground after falling from your desk
D) A pencil laying on the ground
D
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What is the primary function of the transverse tubules?
A. They attach muscle fibers to skeletal elements to exert force. B. They conduct action potentials from the surface of the muscle fiber to internal regions near myofibrils. C. They act as a channel for Ca2+ ions during excitation-contraction coupling. D. They attach troponin to tropomyosin. E. They form cross-bridges between actin and myosin during muscle contraction.
Nitrogen has five electrons in its valence shell. How many electrons does it need to gain to complete its valence shell?
a. one b. two c. three d. seven e. eight
What is the CORRECT order for the application of Koch's postulates?
I. Inoculate suspect agent into test subject and observe that subject develops disease of interest. II. Isolate and culture suspect agent in the laboratory. III. Find suspect agent is every case of disease of interest but not in healthy hosts. IV. Recover and isolate suspect agent from test subject. A) III, I, IV, II B) IV, I, III, II C) I, II, III, IV D) III, II, I, IV E) IV, I, II, III
Autosomal recessive genetic disorder that causes a lack of the enzyme that metabolizes phenylalanine; the accumulation of phenylalanine causes problems with nervous system development and function.
What will be an ideal response?