The gray matter in the CNS consists of parts of neurons not covered with myelin

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Anatomy & Physiology

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Positive feedback moves a controlled variable even further away from a steady state

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Anatomy & Physiology

The plateau phase of the action potential in a contractile cardiac muscle cell occurs as a result of activation of slow Ca2+ channels

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Anatomy & Physiology

The primary drive to breathe is elicited by which of the following?

A. reduced PCO2 B. increased PCO2 C. increased PO2 D. reduced PO2

Anatomy & Physiology

How is the length of a skeletal muscle cell related to the force it can generate?

A. The tension in a skeletal muscle cell is greatest when contractions occur at either very short or very long lengths. B. Skeletal muscle cells generate the same amount of force, regardless of their length. C. The shorter a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. D. The longer a skeletal muscle cell is when it begins to contract, the stronger the force generation will be. E. Skeletal muscle cells generate the most force when the contraction occurs at an intermediate length.

Anatomy & Physiology