EBK BIOLOGY
4th Edition
ISBN: 8220102797376
Author: BROOKER
Publisher: YUZU
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Textbook Question
Chapter 44, Problem 9TY
Which of the following statements about movement and locomotion is false?
- a. Terrestrial animals and flying animals expend energy to provide lift.
- b. Swimming animals typically expend energy to provide thrust but not lift.
- c. Flexors and extensors are examples of muscles called agonists.
- d. Flexors cause bending at a joint.
- e. Extensors cause straightening of a limb
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Movement of a limb in two directions requires a pair of muscles becausea. a single muscle can only pull and not push.b. a single muscle can only push and not pull.c. moving a limb requires more force than one muscle can generate.d. None of the above.
Which of the following statements best describes the sliding filament mechanism of muscle contraction?
a. Actin and myosin filaments do not shorten, but rather, slide past each other.
b. Actin and myosin filaments shorten and slide past each other.
c. As they slide past each other, actin filaments shorten, but myosin filaments do not shorten.
d. As they slide past each other, myosin filaments shorten, but actin filaments do not shorten.
Why might multiple, small motor units be advantageous over a single large motor unit?
A.
They enable finer control over movements.
B.
Small motor units contract more rapidly than large motor units.
C.
Small motor units have greater capacity for strength improvement.
D.
The strength of contraction can be modulated more easily in small motor units.
E.
They enable a strong, flexing motion.
Chapter 44 Solutions
EBK BIOLOGY
Ch. 44.1 - Prob. 1CCCh. 44.2 - Prob. 1CCCh. 44.2 - Prob. 2CCCh. 44.2 - Prob. 1BCCh. 44.3 - Prob. 1CCCh. 44.3 - Prob. 1BCCh. 44.3 - What is the normal function of the PPAR- protein...Ch. 44.3 - CoreSKILL What was the hypothesis proposed by...Ch. 44.3 - CoreSKILL Assume that the mean weight of both...Ch. 44 - Prob. 1TY
Ch. 44 - Prob. 2TYCh. 44 - Prob. 3TYCh. 44 - Prob. 4TYCh. 44 - The function of ATP during muscle contraction is...Ch. 44 - Prob. 6TYCh. 44 - Stimulation of a muscle fiber by a motor neuron...Ch. 44 - Muscle fibers that have a large number of...Ch. 44 - Which of the following statements about movement...Ch. 44 - Prob. 10TYCh. 44 - Compare the structural and functional features of...Ch. 44 - List and briefly describe the steps in the...Ch. 44 - Prob. 3CQCh. 44 - Describe as many types of animal locomotion as you...Ch. 44 - Discuss the three types of muscle tissues found in...
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