BIOLOGY 235 MIDTERM 1- VERSION B 1. Know components of the lipid bi-layer o The basic structural framework of the plasma membrane is the lipid bilayer, two back-to-back layers made up of three types of lipid molecules—phospholipids, cholesterol, and glycolipids o The bilayer arrangement occurs because the lipids are amphipathic molecules, which means that they have both polar and nonpolar parts. 2. Bonds between water molecules- what type of bond is it? o Polar covalent/hydrogen bond ...

1. Maintenance of calcium ion homeostasis is critical to neurological, cardiac and skeletal muscle function. Consider the roles of two hormones involved in the regulation of the concentration of calcium ions in the blood. Parathyroid hormone increases the concentration of calcium ions in the blood, while calcitonin decreases the concentration. Based on this information predict the body’s response to restore calcium balance if a person swallowed 100 antacid tablets made of a calcium compound in...