Final answer:
The statement that light enters the diaphragm first is false. In the human eye, light first passes through the cornea. The diaphragm is related to the respiratory system and does not interact with the path of light entry into the eye.
Step-by-step explanation:
When considering the correct order in which light enters the structures of the eye, it is false to state that light enters the diaphragm first. In the context of the human respiratory system, the term 'diaphragm' refers to the muscle that plays a critical role in breathing. For the human eye, the first structure that light encounters is the cornea. The cornea is a transparent layer that helps to focus incoming light. After passing through the cornea, light then continues through the lens, which further focuses it onto the retina where visual signals are generated.
To address some of the provided keywords, the diaphragm does indeed contract due to conscious control, enabling us to alter our breathing patterns. However, this does not relate to the path of light entry into the eye. In contrast to the statement about the diaphragm, it is true that pneumonia can be caused by fungi, among other pathogens. Additionally, gas exchange occurs in the alveoli of the lungs, which is at the end of the respiratory pathway, after air has passed through the nasal cavity, pharynx, and trachea.