Final answer:
The statement that additional teaching is needed is "Smoking only once in a while will not make a person addicted to smoking." This is incorrect because occasional smoking can still lead to addiction, and smoking is harmful to the respiratory system, contributing to diseases such as COPD and lung cancer.
Step-by-step explanation:
The student who has been instructed about lung function and smoking requires additional teaching when the student says "Smoking only once in a while will not make a person addicted to smoking." This statement is not accurate because even occasional smoking can lead to nicotine addiction. Moreover, it is well-documented that smoking can damage the respiratory system, leading to conditions such as chronic obstructive pulmonary disease (COPD) and lung cancer. Smoking increases the risk of respiratory infections, impairs lung function, and even exposure to secondhand smoke can increase the risk of developing respiratory conditions. Other statements made by the student such as an older person may breathe more shallowly, an upright position aiding in easier breathing, and a physically fit person breathing more slowly than a sedentary person, are all correct and do not require additional teaching. It is important to understand that cessation of smoking can significantly slow down the progression of diseases like COPD, and adopting proper breathing techniques and maintaining physical fitness can improve overall lung function.