The Following Are the Main Steps in the Generation of an Action

question 21

Multiple Choice

The following are the main steps in the generation of an action potential. 1.Sodium channels are inactivated.
2) Voltage-gated potassium channels open and potassium moves out of the cell,initiating repolarization.
3) Sodium channels regain their normal properties.
4) A graded depolarization brings an area of an excitable membrane to threshold.
5) A temporary hyperpolarization occurs.
6) Sodium channel activation occurs.
7) Sodium ions enter the cell and depolarization occurs.
The proper sequence of these events is

• A)4,6,7,3,2,5,1.
• B)4,6,7,1,2,3,5.
• C)6,7,4,1,2,3,5.
• D)2,4,6,7,1,3,5.
• E)4,2,5,6,7,3,1.

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Definitions:

Double Diminishing-Balance

A method of accelerated depreciation which calculates depreciation at twice the rate of the straight-line depreciation method on the remaining book value each year.

Depreciation Expense

An accounting method of allocating the cost of a tangible asset over its useful life, representing how much of an asset's value has been used.

Diminishing-Balance

A method of depreciation that accelerates the rate at which an asset loses value, applying a constant rate to the declining book value each period.

Constant Percentage

A method or rate that does not change over time, often used in calculations of growth, discount, or interest rates.