Ion Channels on Photoreceptors That Open or Close Due to Cyclic

question 9

Multiple Choice

Ion channels on photoreceptors that open or close due to cyclic guanosine monophosphate (cGMP) are responsible for maintaining the photoreceptor's resting membrane potential, which is usually about

• A) -80 mV, until it is depolarized by light.
• B) -40 mV, until it is depolarized by light.
• C) -80 mV, until it is hyperpolarized by light.
• D) -40 mV, until it is hyperpolarized by light.
• E) -20 mV, until it is hyperpolarized by light.

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Definitions:

LIFO Inventory Cost Method

An inventory valuation method that assumes the last items purchased are the first ones sold, affecting the company's bookkeeping and tax calculations.

Current Revenues

Income received by an entity within its normal business operations and within the current accounting period.

Lower-Of-Cost-Or-Market

An accounting principle that values inventory at the lesser of its historical cost or the market replacement cost, ensuring inventory is not overstated.

Inventory Valuation

The method used to calculate the cost associated with an inventory, which can impact the cost of goods sold and net income.