Pepsin had its greatest activity in Tube 1 where it was combined with 2 drops of HCl. Tube 1 had a more opaque and cloudy beige color as compared to the other tubes. This makes sense as pepsin is an enzyme produced by chief cells that are found in the stomach. Originally, when the proenzyme pepsinogen mixes with the hydrochloric acid from the gastric juice, it becomes pepsin. Pepsin works best at the acidity of gastric juice, also known as stomach acid. In the stomach, it helps digest proteins from food into peptides successfully. B. Bile salts are cholesterol derivatives used to emulsify fats. With the help of bile salts, fat physically breaks down into droplets to let the lipase enzyme break down the fat. In this experiment, bile salts were added into Tube 4 and Tube 5. Tube 4 and Tube 5 were first avocado green and cobalt blue, respectively. At the end of the 15-minute duration, Tube 4 was a mustard yellow, and Tube 5 was still the same shade of blue. The color change to yellow meant that acids were produced during fat digestion. Pancreatin was only presented in Tube 4, so the color …show more content…
On the other hand, the volume pulse wave is a recording of the changes of blood volume in an artery during one cycle of the heart. The dicrotic notch from the volume pulse wave, in which pressure increases, occurs at the same time as the QRS complex from the EKG where depolarization of the ventricles occurs. “A” from the volume pulse wave, when the contraction of the ventricle initiates pressure to the blood, occurs at the same time as the EKG’s T wave, repolarization of the muscle fibers of the ventricles. Lastly, “B” from the volume pulse wave occurs at around the same time as “P” on the EKG recording. This means that the peak pressure applied to blood happens at the same time as the depolarization across the heart muscle fibers of the left and right