The Pressure Exerted by a Column of Liquid Is Equal

question 10

Multiple Choice

The pressure exerted by a column of liquid is equal to the product of the height of the column times the gravitational constant times the density of the liquid, P = ghd. How high a column of methanol (d = 0.79 g/mL) would be supported by a pressure that supports a 713 mm column of mercury
(d = 13.6 g/mL) ?

• A)713 mm
• B)41 mm
• C)1.2 × 10⁴ mm
• D)9.7 × 10³ mm
• E)17 mm

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Definitions:

Myofibrils

Essential components of muscle fibers involved in contraction, made up of a series of repeating units called sarcomeres that give muscles their striated appearance.

Ca2+ Binding

The process by which calcium ions (Ca2+) bind to specific molecules or cellular components, playing crucial roles in various biological processes including muscle contraction and neurotransmitter release.

Cross-bridging

refers to the interaction between actin and myosin filaments in muscle fibers during contraction, allowing for force generation.

Myosin Kinase

An enzyme that phosphorylates myosin light chains, which is crucial in the contraction of muscle cells.