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Human Physiology, 7/e
Stuart I Fox, Pierce College
Muscle: Mechanisms of Contraction and Neural Control

Critical Thinking Exercises

Please answer all questions



1

You are floating motionless in outer space. Your mass is 70 kg. Your 70 kg transporter floats by and you attempt to bring in closer by flexing your right arm. Are you more likely to produce an isotonic or isometric contraction?
2

If a person had hereditary amyotrophic lateral sclerosis (=ALS, Lou Gehrig's disease), how might you attempt to cure it?
3

Creatine phosphate (=CP) is a smaller and presumably less costly molecule to make than is ATP. Therefore, why do living things use ATP for most reactions rather than CP?
4

Why is the breast meat of turkeys and chickens white?
5

Try flexing your arms and blinking your eyes. Why do your eyes feel tired after you have blinked them for a short time but your arm doesn't feel so pooped?








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