Final answer:
Cyclic diaphragmatic activity does affect alveolar, intrapleural, and transpulmonary pressures during tidal breathing.
Step-by-step explanation:
The student's statement is true. Cyclic diaphragmatic activity, which refers to the contraction and relaxation of the diaphragm during breathing, does affect alveolar, intrapleural, and transpulmonary pressures. When the diaphragm contracts, it increases the volume of the thoracic cavity, causing a decrease in intrapleural pressure and an increase in transpulmonary pressure. These pressure changes allow for the movement of air in and out of the lungs during tidal breathing.