Biology
Biology, 18.10.2019 09:30, marygomez11

What happens when atp supplies energy for thin filaments in a muscle fiber to slide over the thick filaments?
a. the muscle contracts
b. the muscle relaxes
c. the muscle both contracts and relaxes
d. the muscle neither contracts nor relaxes
hair would be dry and brittle without the presence of
a. sebaceous glands
b. keratin
c. melanin
d. fat
compared with the walls of arteries the walls of capillaries
a. are thicker
b. are thinner
c. lack valves
d. have more resistance

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