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
3. Facilitated diffusion and what role does carrier protein play
o Carrier proteins transport substances across membranes by changing shape
4. Know Transcytosis
o Active process of moving substances across a cell using vesicles, most often
across endothelial cells lining blood vessels
5. Is a synovial membrane considered an epithelial membrane?
o No, it is not
6. Know what role triglycerides and cholesterol plays in body
o Triglycerides: protection, insulation, energy storage
o Cholesterol: in bile salts, vit D and steroid hormones, important for steroid synthesis
7. Know location of the Nail Bed (hyponychium)
8. Which layer of the epithelium is not present in Thick skin?
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
3. Facilitated diffusion and what role does carrier protein play
o Carrier proteins transport substances across membranes by changing shape
4. Know Transcytosis
o Active process of moving substances across a cell using vesicles, most often
across endothelial cells lining blood vessels
5. Is a synovial membrane considered an epithelial membrane?
o No, it is not
6. Know what role triglycerides and cholesterol plays in body
o Triglycerides: protection, insulation, energy storage
o Cholesterol: in bile salts, vit D and steroid hormones, important for steroid synthesis
7. Know location of the Nail Bed (hyponychium)
8. Which layer of the epithelium is not present in Thick skin?
