Which Part of the Respiratory System Is the Site of Exchange

question 33

Multiple Choice

Which part of the respiratory system is the site of exchange of gases between blood and air?

• A) alveoli
• B) bronchioles
• C) trachea
• D) pharynx
• E) bronchi

---

Definitions:

Hydrophobic Attractions

The tendency of nonpolar substances to aggregate in aqueous solutions and avoid water.

Non-Polar

Describes molecules that do not have an unequal distribution of electrons, resulting in no regions of positive or negative charge.

Double Helix

The structure formed by double-stranded molecules of nucleic acids, such as DNA, characterized by two spirals winding around a common axis.

Hydrogen Bonds

Weak bonds formed between a hydrogen atom in one molecule and a more electronegative atom, important in determining the structure of water and biomolecules.