Gas Exchange at the Respiratory Membrane Is Efficient Because

question 2

Multiple Choice

Gas exchange at the respiratory membrane is efficient because

• A)the difference in partial pressures is substantial.
• B)the distances involved in exchange are small.
• C)the total surface area of the membrane is large.
• D)blood flow and air flow are coordinated (blood flow is highest around alveoli with highest Po₂).
• E)All of these are correct.

---

Definitions:

Customers Served

A metric indicating the number of customers a business has provided products or services to within a specific time period.

Total Expenses

The sum of all costs and expenses incurred by a business or individual in a given period.

Spending Variance

The variance between the budgeted and the actual expenditure in a given category or time frame.

Planning Budget

A budget prepared for a future period that outlines expected revenues, expenses, and other financial activities to guide decision-making.