1. Explain what makes gaseous exchange possible at the alveolar surface in humans (4 answers) 2. Describe how gaseous exchange occurs at the alveolar surface in humans.(6 answers)
3. What are the physical changes that occur to air during gaseous exchange?(4 answers)
4. State importance of gaseous exchange to a human.(4 answers)​

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…

b is the correct answer

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.