Analysis of a glandular secretion indicate ty it contains some DNA , RNA and Membrane component such as phospholipids. what kind of secretion is this and why?

Describe the general structure of all cell membranes. How does this membrane structure determine the selective permeability of what can pass across the membrane. Then describe 3 ways cell membranes will differ from one another.

Describe what gap junction are, emphasizing on how they are different two other cellular points of contact, their protein components and cellular function. Describe the three main sources of membrane fluidity.  Describe in detail what proteoglycans are, including their hygroscopicity and biological roles.

What are the differences between constitutive and regulated secretions?

How can you turn a simple columnar epithelium into a water barrier?

Why do cells of thenephron tubules present agreat amount ofmitochondria?

If a simple epithelium has well-developed tight junctions, explain howNaCl can move from one side of the epithelial layer to the other, whattype of epithelium it is likely to be, and how the movement of NaClcauses water to move in the same direction.

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. Describe the general structure of all cell membranes. How does this membrane structure determine the selective permeability of what can pass across the membrane. Then describe 3 ways cell membranes will differ from one another. 2. List and describe the three main types of cell attachments. Make sure your answer includes what they help a cell attach to. If you wanted to do immunocytochemistry to specifically stain each type of cell attachment, what is a protein that could be used for each type of cell attachment (in other words, what is a unique protein for each attachment type)? 3. In a typical neuron, there are ligand gated ion channels and there are voltage gated ion channels. During the electrical communication between two neurons, describe the involvement of these two types of ion channels. 4. What are four common features of all signaling pathways involving transmembrane receptors? Then, describe the pathway of one of the specific signaling pathways we discussed in class…

Match A-I as the following: -Pseudostratified ciliated columnar epithelial layer -Cilia -Pseudostratified ciliated columnar epithelial -Simple columnar epithelial cells -Simple columnar epithelial -Connective tissue -Basement membrane