Use the Following Information to Answer the Question

question 32

Multiple Choice

Use the following information to answer the question.
Due to its system of air sacs connected to the lungs, the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.
If the inner lining of the air sacs is neither thin nor highly vascularized, then what can be inferred about the air sacs?

• A) They must not belong to the respiratory system.
• B) They cannot be derived from endoderm.
• C) They are not efficient sites of gas exchange between air and blood.
• D) They cannot effectively moisturize the air before it reaches the lungs.

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Definitions:

Collateral

An asset that a borrower offers to a lender as a security for a loan, which can be seized if the loan is not repaid.

Savings Deposits

Bank accounts that pay interest on the money deposited, meant for saving rather than daily transactions.

Capital Formation

The process of building up a country's stock of real capital, such as buildings, machinery, and equipment, which is used for production.

Economy

The system of production, distribution, and consumption of goods and services within a society.