A protein channel that opens or closes in response to a stimulus would be classified as a ______ channel.

A. leak
B. gated
C. stimulus


Ans: B. gated

Anatomy & Physiology

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The alveolar wall is ____________________ (how many?) cell layer(s) thick, and the wall of the pulmonary capillaries surrounding an alveolus is ____________________ (how many?) cell layer(s) thick

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Anatomy & Physiology

Becoming more physically fit ____________________ a person's cardiac reserve

Fill in the blank(s) with correct word

Anatomy & Physiology

Physical evidence that supports the sliding filament theory of muscle contraction includes

A) constant distance between Z lines during contraction. B) decreased width of the H band during contraction. C) increased width of the I band during contraction. D) decreased width of the A band during contraction. E) the I band and H band distance is constant during contraction.

Anatomy & Physiology

The process of ventilation includes both the transport of gases by bulk flow and the diffusion of gases into and out of the blood

Indicate whether the statement is true or false.

Anatomy & Physiology