32. 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
33. Hair would be dry and brittle without the presence of
A. sebaceous glands
34. 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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33) B. Keratin, because it coats the hair shaft.
sebum is produced in the roots of the hair, and by the skin.
melanin is a pigment is eyes and skin.
fat is inside the body.
can you help me with some more question @alfordabby ?
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35. what could happen if the epiglottis fails to close correctly over the trachea when a person swallows
A. the person may experience heartburn
B. the person may choke
C. the person will experience a heart attack
D. the person will get swollen lymph nodes
36. which hormone is largely responsible women having wider hips than me?
38. if a person has memory b cells against a certain pathogen the person is
A. likely to develop that disease
B. much less likely to develop the disease a second time
C. able to spread the disease to others through physical contact
D. probably still with disease