Darwinism : The Most Important Contribution of the Victorian Era. Charles Darwinâs revolutionary idea of evolution sparked dramatic debate in the scientific and, most especially, religious communities, as well as inspiring a new wave of thought in the minds of the world. There was also plenty of controversy, particularly from the many believers of creationism during the Victorian era.
1. Proteases Digestion of proteins is initiated by pepsin in the stomach, but the bulk of protein digestion is due to the pancreatic proteases. Several proteases are synthesized in the pancreas and secreted into the lumen of the small intestine.
The primary transporter responsible for the acidity of the stomach is the H+/K+ ATPase, which is located on the apical surface of the cell. Parietal cells secrete a proton (H+) into the lumen of the stomach in exchange for a potassium ion (K+) into the parietal cell. The H+/K+ ATPase pumps against a H+ concentration gradient of over 1 million:1.