Explanation:
guessing
amino acid?
protein building blocks
peptide bonds hold them together
Answer: I think it was Richard Nixon.
I'm not completely sure about it, but I hope this helps!! :)
Answer:
Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins. Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach.
<span>Because of the U shaped tube having a selective permeable membrane, the number of the water molecules on the sides changes but the number of the sugar molecules remain same. This particular cell membrane is such that it lets only specific kind of molecules and ions pass through.</span>