Match each membrane molecule with its corresponding description. [Each choice will be used exactly once.] Help animal cell membranes maintain fluidity. Combine with other molecules to make cell surface markers that identify self from non- self. Lipid that can be described as saturated or unsaturated. Can serve as transport channels. 1. Phospholipids 2. Carbohydrates 3. Proteins 4. Cholesterol

Match each membrane molecule with its corresponding description. [Each choice will be used exactly once.] Help animal cell membranes maintain fluidity. Combine with other molecules to make cell surface markers that identify self from non- self. Lipid that can be described as saturated or unsaturated. Can serve as transport channels. 1. Phospholipids 2. Carbohydrates 3. Proteins 4. Cholesterol

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

See similar textbooks

Similar questions

Describe the permeability of cell membranes. How to substances cross cell membranes? Utilize the terms bi-polar, semi-permeable, diffusion, active transport, membrane proteins, endocytosis, exocytosis, vesicles, phagocytosis, pinocytosis, etc. (This should be 3-4 paragraphs long)
When the proteins of human gut epithelial cells adhere to each other so tightly that digestive enzymes from the intestinal lumen cannot pass between the cells, these proteins are exhibiting: unrestricted movement, similar to membrane phospholipids (like phosphatidylcholine) restricted movement, based on confinement by diffusion barriers (like tight junctions) restricted movement, based on tethering to extracellular molecules (like collagen) restricted movement, based on attachment to other cells (by proteins like keratin) restricted movement, based on anchoring to intracellular proteins (like spectrin)
Of the following functions the peripheral glycoproteins and glycolipids (surface markers) of animal cell membranes are most important for a) the ability of the cell to recognize like and different cells. b) active transport of molecules against their concentration gradients. c) facilitated diffusion of molecules down their concentration gradients. d)maintaining membrane fluidity at low temperatures.
The fluidity of the plasma membrane increases with 1.Increase in unsaturated fatty acids in the membrane 2.Increase in saturated fatty acids in the membrane 3.Increase in glycolipid content in the membrane 4.Increase in phospholipid content in the membrane
Which of the following factors would tend to increase membrane fluidity? A greater proportion of unsaturated phospholipids A relatively high protein content in the membrane A greater proportion of saturated phospholipids A lower temperature
Below are listed molecules with different chemical characteristics. Knowing that all molecules will eventually diffuse across a phospholipid bilayer, select the list that most accurately predicts the relative rates of diffusion of these molecules (fastest to slowest) across a biological membrane. alanine, propanol, sodium, estrogen sodium, propanol, alanine, estrogen estrogen, propanol, sodium, alanine estrogen, propanol, alanine, sodium
. 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…
Describe the chemical composition of membranes. What are the two most critical functions of membranes? What contributes to membrane fluidity and rigidity? Explain Diffusion. What are the differences between Osmosis and Dialysis? Explain the differences between Iso, Hypo, and Hypertonic conditions. If the solutions is Hypertonic then the cell would be?
What features of a membrane are major contributors to its selectivepermeability?a. phospholipid bilayerb. transport proteinsc. glycolipids on the outer surface of the membraned. peripheral membrane proteinse. both a and b
Which of the following statements are correct? Explain your answers. The plasma membrane is highly impermeable to all charged molecules. Channels have specific binding pockets for the solute molecules they allow to pass. Transporters allow solutes to cross a membrane at much faster rates than do channels. Certain H+ pumps are fueled by light energy. The plasma membrane of many animal cells contains open K+ channels, yet the K+ concentration in the cytosol is much higher than outside the cell. A symport would function as an antiport if its orientation in the membrane were reversed (i.e., if the portion of the molecule normally exposed to the cytosol faced the outside of the cell instead). The membrane potential of an axon temporarily becomes more negative when an action potential excites it.
The fluid mosaic model was first proposed by S.J. Singer and Grath L. Nicolson in 1972 to explain the structure of the plasma membrane. Discuss the structure of the different lipid molecules within the plasma membrane and relate it to their functions in the animal cell. You may choose any animal cell that you have learnt biology
A blood cell with a 2% internal solute concentration is placed in a solution that has a 0.2% solute concentration. The solute is impermeable to the plasma membrane. How would you classify the solution compared to the cell – hypotonic, hypertonic or isotonic? Why? (2 pts.) B) Will the solutes move across the membrane? Why or why not? C) What type of transport would occur in this situation – diffusion, facilitated diffusion, osmosis, active transport or bulk transport. Explain. D) What would happen if the cell began to produce a new membrane protein that allowed the solutes to freely move in across the membrane? ould this change your answer to Part C? Explain.