Answered: 1. Most land animals with exoskeletons…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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1. Most land animals with exoskeletons are smaller than the volume of a mouse, and most vertebrates are larger than a mouse (marine invertebrates can be somewhat bigger). What keeps an insect with an exoskeleton from being as big as a horse.

2. Bone gains its rigidity from brick‑hard deposits amidst living cells. Yet we cannot build a large stone skyscraper from a small stone house without breaking the house apart. Yet our bones grow from small hard bones to large hard bones without ever breaking apart into soft vulnerable tissue. How is that accomplished?

3. Why will an increase in the strength of a stimulus cause an increase in the force of contraction in a whole muscle but not in a single muscle fiber?

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