Question 4 unsaved too much nitrogen in the environment can lead to question 4 options: 1) eutrophication 2) a decrease in photosynthesis 3) an increase in respiration 4) healthier lakes and ponds

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.