The class of lever in which the effort is located between the fulcrum and the load is called
a. class I.
b. class II.
c. class III.
d. class IV.
b
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The sliding filament model of muscle contraction explains that:
A. Tropomyosin must be removed from the actin molecule before it can bind to myosin. B. Muscle contraction requires energy in the form of GTP. C. The sarcomere stretches to create contraction. D. Actin filaments slide past myosin, causing the shortening of the muscle fiber.
The tough, pliable body of a lichen is called a(n)
a. soredium. b. arbuscule. c. thallus. d. sporangium. e. haustorium.
Which of the following organelles is correctly
matched with its function? a. nucleus; protein synthesis b. ER; heredity c. Golgi bodies; packaging d. mitochondria; digestion e. chloroplasts; storage of lipids
What stimulates the production of adrenocorticotropic hormone (ACTH)?
A. CRH B. CIH C. GHRH D. ADH