There are water-tight junctions between cells in the stomach, so that no HCl can leak out of the stomach into the abdomen, which are tight junctions.
Option E
Explanation:
The tight junctions are the water tight sealing boundaries through which the content of the stomach do not cross the epithelial lining of the stomach and neither do the outer fluid crosses the epithelial lining inside of it.
The tight junction is established via claudins, which are protein molecules by constituents. They are present in the cell and they pair up with the claudin molecule present on the adjoining or opposite claudin of the other cell, forming branch like tight network.
Answer: C. Oxygen delivery to muscle is increased when more carbon dioxide is produced by the muscle.
Explanation:
When someone is doing an exercise, for example, his heart rate increases. This increases the rate at which oxygen is carried from the blood to the muscles and carbon dioxide is moved from the muscles to the lungs, where it will be breathed out.
Molecular biology is the study of biology at a molecular level
Noble gases have a complete outer shell meaning they have eight valence electrons (octet rule); having eight electrons makes the atom very stable and unlikely to react because they don't need anymore electrons.
Answer: Slips, trips and falls are the potential hazards in school
Explanation:Clean and safe water must be provided at schools.