Chapter 7: Adventures in Bodybuilding

1. Refer to the timeline on p.121 in Your Inner Fish – what is most surprising to you about the timescale?  Explain your choice.

The most surprising thing about the timescale is how recently modern humans came into existence. This is shocking to me, because the events we learn in history seem so numerous and ancient. It is difficult to imagine an earth without human life.

2. What is the most common protein found in the human body?  Name it and describe it.

The most common protein found in the human body is collagen. When magnified 10,000 times, it resembles a rope, consisting of bundles of tiny molecular fibers. Like rope, it is strong when held taut, but weak when relaxed.

3. Explain how cells “stick” to one another; give at least one example.

Cells are held together by a biological ‘glue’ that also allows them to communicate. It contains a variety of different molecules and gives our tissues and organs their distinct appearance and function. Some tissues have cells in organized strips or columns, while others have cells that are randomly scattered or loosely attached to each other. For example, the molecules in between bone cells determine the strength of the bone and more loosely attached proteins in eyes make them more squishy and yielding.