Ca++ Enters the Cell When an Action Potential Is Generated

question 88

Multiple Choice

Ca++ enters the cell when an action potential is generated. Diffision and electrostatic pressures push Ca++ into the cell. Ca++ channels are

• A) passive.
• B) chemically-gated.
• C) voltage-gated.
• D) always open.
• E) chemically-gated and voltage-gated.

---

Definitions:

Ability-to-Pay Principle

A taxation principle that argues taxes should be levied according to an individual's or entity's capability to bear the tax burden.

Income Taxes

Taxes levied by governments on individuals or corporations' income, where the tax rate may increase as the taxable amount increases.

Excise Taxes

Taxes imposed on the sale of specific goods and services, such as tobacco, alcohol, and gasoline, usually aimed at discouraging their consumption or generating revenue.

Regressive Tax

A tax that takes a larger percentage from low-income earners than from high-income earners, considered regressive because it affects those who are less able to pay.