Biology, Eighth Edition (Raven)

Chapter 47: The Musculoskeletal System

Post Test

1
What is the sequence of events in earthworm movement? (p .944)
1 = chaetae lose contact with ground
2 = chaetae dig into ground
3 = anterior circular muscles contract extending the body forward
4 = longitudinal muscles contract
5 = wave of circular muscle activity passes back in waves
A)1, 2, 3, 4, 5
B)3, 1, 5, 4, 2
C)3, 5, 1, 4, 2
D)4, 2, 3, 1, 5
2
Osteoblasts: (p. 946)
A)secrete alkaline phosphatise.
B)can turn into osteocytes.
C)can turn into osteoclasts.
D)are not associated with collagen fibers.
E)both a and b
3
Isotonic contraction of muscles is when: (p. 952)
A)the muscle attempts to shorten but cannot do so.
B)the force of contraction remains relatively constant throughout the contraction process.
C)the muscle goes into spasms.
D)the force of contraction varies throughout the contraction process.
E)none of the above
4
What is required for striated muscles to contract? (p. 955)
A)release of calcium ions from troponin
B)binding of calcium ions to tropomyosin
C)binding of calcium ions to troponin
D)release of calcium ions from tropomyosin
E)none of the above
5
True of False: Some insects beat their wings at frequencies faster than the nerves can carry successive impulses. (p. 960)
A)True
B)False
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Notice before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.