Phe323

Lipids are large molecules and generally are not water-soluble. Like carbohydrates and protein, lipids are broken into small components for absorption. Since most of our digestive enzymes are water-based, how does the body break down fat and make it available for the various functions it must perform in the human body? A family of organic compounds composed of carbon, hydrogen, and oxygen. They are insoluble in water. The three main types of lipids are triglycerides, phospholipids, and sterols. From the Mouth to the Stomach The first step in the digestion of triacylglycerols and phospholipids begins in the mouth as lipids encounter saliva. Next, the physical action of chewing coupled with the action of emulsifiers enables the digestive enzymes to do their tasks. The enzyme lingual lipase, along with a small amount of phospholipid as an emulsifier, initiates the process of digestion. These actions cause the fats to become more accessible to the digestive enzymes. As a result, the fats b...

(RESPONSES AND ADAPTATIONS ON SYSTEMS OF THE BODY) Responses are sudden, temporary functional physiological changes brought on the body as a result of acute exercise. These changes can be regarded to as short term effects of exercise. Short term effects of exercise on the body systems When a person takes part in exercise the cardiovascular, respiratory, energy and muscular systems all work together to supply energy to the working muscles and removes waste products. When the muscles start to work, they need more oxygen so the respiratory system responds by getting more oxygen into the lungs. The blood carries greater amounts of oxygen and the heart responds to pump more oxygenated blood around the body. These effects are shown below: Cardiovascular system  Increase in stroke volume (SV);  increase in heart rate (HR); increase in cardiac output (Q); increase in blood pressure (BP); redistribution of blood flow Respiratory system Increase in breathing rate (BR);  increase...