Biology
12th Edition
ISBN: 9781260494570
Author: Raven, Peter
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Textbook Question
Chapter 45, Problem 2U
Worms use a hydrostatic skeleton to generate movement. How do they do this?
a. Their bones are filled with water, which provides the weight of the skeleton.
b. The change in body structure is caused by contraction of muscles compressing the watery body fluid.
c. The muscles contain water vacuoles, which, when filled, provide a rigid internal structure.
d. The term hydrostatic simply refers to moist environment. They generate movement just as arthropods do.
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Contracting longitudinal muscles which puts pressure on the hydrostatic skeleton and causes it constrict and elongate
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Simultaneous contraction of longitudinal and circular muscles within a segment
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Chapter 45 Solutions
Biology
Ch. 45.1 - Compare hydrostatic skeletons, exoskeletons, and...Ch. 45.1 - Explain how animals with hydrostatic skeletons...Ch. 45.2 - Prob. 1LOCh. 45.2 - Prob. 2LOCh. 45.2 - Prob. 3LOCh. 45.3 - Prob. 1LOCh. 45.4 - Prob. 1LOCh. 45.4 - Prob. 2LOCh. 45.4 - Prob. 3LOCh. 45.5 - Prob. 1LO
Ch. 45.5 - Describe how friction and gravity affect...Ch. 45.5 - Prob. 3LOCh. 45 - Prob. 1IQCh. 45 - Exoskeletons and endoskeletons differ in that a....Ch. 45 - Worms use a hydrostatic skeleton to generate...Ch. 45 - Bone develops by one of two mechanisms depending...Ch. 45 - Which of the following statements best describes...Ch. 45 - Motor neurons stimulate muscle contraction via the...Ch. 45 - Prob. 6UCh. 45 - If you wanted to study the use of ATP during a...Ch. 45 - Place the following events in the correct order....Ch. 45 - You take X-rays of two individuals. Ray has been a...Ch. 45 - You have identified a calcium storage disease in...Ch. 45 - How do the muscles move your hand through space?...Ch. 45 - How can osteocytes remain alive within bone? a....Ch. 45 - Swimming underwater using forelimbs for propulsion...Ch. 45 - If a drug inhibits the release of ACh, what will...Ch. 45 - Prob. 1SCh. 45 - Prob. 2SCh. 45 - The nerve gas methylphosphonofluoridic acid...Ch. 45 - If natural selection favors the evolution of wings...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- What happens to a fish’s movement speed in colder water?A. The fish swims more slowly.B. The fish swims at the same speed by making each muscle contract more strongly.C. The fish swims at the same speed by recruiting more muscle fibers.D. The fish swims faster.arrow_forwardFlatworms can reach a maximum size of around 40cm. Whilst this is big for a worm, there are certainly larger animals on earth. What might it be that restricts the flatworms body size? A. They have an exoskeleton that restricts their growth. B. They do not have a circulatory system. C. They are exothermic animals that have limited energy for growth. D. They are acoelomates and so the growth of their internal organs is restricted by growth of the outer body wall.arrow_forwardWhich statement comparing these organisms is correct? O A. Both animals have a skeleton. O B. Both animals have an exoskeleton. C. The crab has a skeleton, and the human has an exoskeleton. D. The crab has an exoskeleton, and the human has a skeleton.arrow_forward
- Which statement about the diagram is not correct??  A. All of these illustrations and photos represent muscle cells B. Illustrations "B" are skeletal muscle which we know from the striations C. The purple ovals in these illustrations are nuclei D. Illustrations "C" are smooth muscle cellsarrow_forwardWhat is the function of intercalated discs? A. Unite skeletal muscles electrically and physically and enable articulation. B. Divide cardiac muscles electrically and physically and enable the heart to contract as a unit. C. Divide skeletal muscles electrically and physically and enable articulation. D. Unite cardiac muscle cells electrically and physically and enable the heart to contract as a unit.arrow_forwardExplain how cats are able to jump from great heights without sustaining injuries. Do you think it is possible for humans to achieve such feats?arrow_forward
- These animals all share a common structure. Exoskeleton Exoskeleton Exoskeletonarrow_forwardA muscle that appears striated is most likely? a. visceral b. cardiac c. skeletal O d. smootharrow_forwardgive examples of animals with hydrostatic skeleton that are soon changed to exoskeleton or endoskeleton when they growarrow_forward
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