An Action Potential Is Regarded as an Example of a Positive

question 63

Multiple Choice

An action potential is regarded as an example of a positive feedback. Which of the following examples below best illustrates the positive feedback aspect of an action potential?

• A) Potassium permeability is about 25 times greater than sodium ions.
• B) Voltage gated potassium ion channels open slowly and remain open long enough to cause hyperpolarization.
• C) A threshold stimulus will cause the opening of voltage gated sodium ion channels that will cause further depolarizing stimulus. This stimulus will open still more voltage gated sodium ion channels.
• D) The sodium potassium pump consistently moves ions as long as ATP is available, and regardless of membrane potential changes.

Analyze how historical events and societal structures have influenced health trends and life expectancy.

Understand the role of public and health care systems in improving population health.

Examine health disparities along lines of ethnicity, gender, and socioeconomic status.

Demonstrate knowledge of the impact of global health issues, such as HIV/AIDS and the social efforts to address them.

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Definitions:

Unearned Liability

An obligation that arises when a business receives payment for goods or services that have not yet been delivered or performed, also known as deferred revenue.

Bonds Payable

A financial accounting term for the outstanding debt a company owes to bondholders, to be paid at a future date.

Warrants

Long-term options issued by a company that grant the holder the right to purchase company shares at a specific price before a specified date.

Ex Rights

A status of a stock that signifies it is trading without the rights to a recent issue or dividend declared, affecting its immediate value.