In Most Cells, There Are Electrochemical Gradients of Many Ions

question 34

Multiple Choice

In most cells, there are electrochemical gradients of many ions across the plasma membrane even though there are usually only one or two electrogenic pumps present in the membrane. The gradients of the other ions are most likely accounted for by

• A) cotransport proteins.
• B) ion channels.
• C) carrier proteins.
• D) passive diffusion across the plasma membrane.
• E) cellular metabolic reactions that create or destroy ions.

---

Definitions:

Unexpired Insurance

The portion of an insurance premium that has not yet expired during the policy period.

Fiscal Period

A specific time period for which an organization prepares financial statements, typically a year, but can also be a quarter or month.

Deferred Expense

A deferred expense is an expenditure that is made in advance and recorded as an asset until it is consumed or its value expires, at which point it is charged to expense.

Accrual Basis

An accounting method where transactions are recorded when they are earned or incurred, regardless of when cash is exchanged.