Our example tells us that digestion in the stomach is due to several individual factors. We want to match the factor on the left with its digestive function on the right, and some factors may match more than one function. Alright. So our factors here, we have mechanical digestion by peristalsis, hydrochloric acid, pepsin, and lipase. And we have different functions over here on the right. So let's go through them one by one.
Protein denaturation. Which one of these things denatures proteins? When we said protein denaturation, that was due to the hydrochloric acid. So I'm going to put an a on that line there.
Next, we have protein hydrolysis. Alright. Protein hydrolysis, that's actually breaking the bonds in the amino acid chain, breaking those peptide bonds. That would be due to pepsin. So pepsin, that enzyme. I'm going to put a b on that line there.
Next, we have mixing chyme and gastric juice. What would mix chyme and gastric juice? Well, mechanical digestion by peristalsis. That gets a c there. Remember, that's just those waves of muscle contraction that's just sloshing everything around.
Next up, we have lipolysis. Well, lipolysis, the breaking down of lipids, that would happen by lipase, the enzyme that breaks down fats. So I'm gonna put a d on that line there.
Our lines are full, but we got more to go. We have e, increasing surface area of food particles. What would do that? Well, increasing the surface area, that's just sort of physically breaking up the food. That would be through mechanical digestion by peristalsis. So this first line gets an e on it.
And finally, we have killing bacteria. Alright. So which of these things is going to help kill the bacteria? In the stomach, killing bacteria, that hydrochloric acid, HCl, that's gonna help kill bacteria and be one of those first lines of defense to keep your body from being overrun by bacterial infection.
With that, we've matched all our functions to our factors. We did our job. Good work.