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According to sliding filament theory, which myofilament(s) move during contraction?

A marathon runner would most likely experience muscle fatigue as a result of: 

Define the term motor unit. How does motor unit size affect its properties?

Which of the following is not a component of a feedback loop?

Which category of polymers (biological macromolecules) is composed of amino acid monomers?

The octet rule states that atoms (except H and He) achieve stability when their valence (outermost) shell contains what number of electrons?  

Osmosis is defined as the passive flow of __________ from areas of low solute concentration to areas of high solute concentration.

Which component of homeostatic control systems, typically a muscle or gland, is responsible for producing the actual response to the stimulus?

Briefly explain why negative feedback is more common than positive feedback when regulating normal conditions within the body.

Which is the correct net ionic equation for the reaction of chlorous acid with calcium hydroxide?