Name the four parts to a phospholipid molecule (2 points) 2. Play the animation of phospholipids being immersed in water (micelle formation).
Why do the tails float in the water pointing up? What happens when a second layer of phospholipids are added? (4 points) 3. Which of the following are also found in the cell membrane: lipids, proteins, or carbohydrates (2 points) Links: http://telstar. ote. cmu. edu/biology/animation/Membranes/membranes. html Steroids: 1. View the “overview” button on this link. Besides its role in the cause of heart disease, name four useful functions of cholesterol in the body. (4 points) 2. View the “Heart Disease” button on this link.
List two reasons why bad cholesterol can elevate in a person. Why can’t a person remove LDL from the blood when they are genetically predisposed? How does exercise help? (4 points) Links: http://www. wiley. com/legacy/college/boyer/0470003790/animations/cholesterol/cholesterol. htm Saturated and unsaturated fats 1. Find the paragraph on saturated and unsaturated fats and explain why unsaturated fats are forced to take on a liquid form. (2 points) 2. Read further and explain what a trans-fatty acid is and why they are a concern to your health.
