Simplify the Numerical Expression $$\frac { 10 } { 30 } \times \frac { 4 } { 20 }$$

question 9

Multiple Choice

Simplify the numerical expression. Give your answer in reduced form. $$\frac { 10 } { 30 } \times \frac { 4 } { 20 }$$

• A) \(\frac { 7 } { 300 }\)
• B) \(15\)
• C) \(\frac { 5 } { 2 }\)
• D) \(\frac { 1 } { 15 }\)
• E) \(40\)

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Definitions:

Absolutely Refractory Period

A phase following action potential in neurons during which no new action potential can be initiated, regardless of the strength of the incoming signal.

Tetraethylammonium (TEA)

Tetraethylammonium (TEA) is a chemical compound known to block potassium channels in cells, used in research to understand ion channel functions and in studying neural and muscular activity.

Potassium Channels

Protein-based pathways located in cell membranes that allow potassium ions to flow in and out of cells, playing a critical role in maintaining the cell's electrical charge and signaling.

Sodium Channels

Protein channels in cell membranes that allow sodium ions to pass into or out of a cell, critical for generating and transmitting electrical signals in tissues like nerves and muscles.