Briefly explain which components of the plasma membrane allow it
to be selectively permeable. Specify how...
Briefly explain which components of the plasma membrane allow it
to be selectively permeable. Specify how each of the components
selected contribute to the selective permeability of the
membrane.
Solutions
Expert Solution
Hydrophobic center to a cell membrane ( also known as
phospholipid bilayer) gives the membrane selective
permeability.
Cell membranes are primarily composed of lipid molecules called
phospholipid.These membrane also contain protein.
Each phospholipid has hydrophilic head that attract water and
each phospholipid has 2 hydrophobic fatty acid tails that are
repelled by water.
When many phospholipids are put in a watery solution , they
spontaneously form spheres called liposomes , that point all water
loving heads towards the water and shield all water fearing tails
from it.
As a result of hydrophobic center of the membrane is that
molecule that dissolves in water are not capable of passing through
the membrane.Charged atoms and polar molecules such as glucose are
repelled by the hydrophobic center of the membrane.
On the other hand , hydrophobic molecules such as lipids can
pass through the membrane.
Microbiology question, please explain in your own
words!!!
The plasma membrane is selectively permeable. This means that it
allows some substances to enter and leave a normal healthy cell,
unrestricted. Toxins produced by certain bacteria cross the plasma
membrane, interfering with normal chemical reactions, and
ultimately killing the affected cell. In your own words explain why
are cells unable to stop the flood of harmful substances such as
botulin into the cell?
What name is given to the process by which water crosses a selectively permeable membrane?
diffusion
pinocytosis
phagocytosis
passive transport
osmosis
Plasma membranes are underrated. Describe how aspects of the
plasma membrane structure (physical components and their
arrangement) enables FOUR aspects of neuronal activity. Use the
terms 'semi-permeable' and 'fluid mosaic' in your response.
Short and simple answers welcome.
Explain why biological membranes are said to be selectively
permeable or semipermeable. Address how materials like amino acids,
carbohydrates, ions and water can pass through the biological
membrane. Be sure to talk about the similarities and differences
between diffusion, facilitated diffusion, osmosis and active
transport. (7 points)
Plasma Membrane. What is the composition of
plasma membrane (PM) of a bacterial cell? How does this compare to
a eukaryotic cell? List the functions of the PM. Without complex
internal membranes, where do prokaryotes carry out membrane-bound
chemical reactions such as ATP synthesis or photosynthesis?
1. What are the components which make up a membrane? 2. How are proteins "associated" with a membrane? 3. What role(s) do membranes play in a cell? 4. How do molecules cross the membrane? Do all need a channel or transporter? Why? 5. What is aquaporin, what role do aquaporin play and what structure and class does it belong to? 6. How are channels different from transporters? 7. What do transporters transport? Is transport active or passive? 8. What are Na/K ATPases and how do they function...
Briefly describe how the components of MU and MACRA allow for
more efficient population health management. Which two areas do you
think are most valuable? Why?
Explain the importance of glycolipids in the plasma membrane,
identify where they are produced inside the cell, and describe the
mechanism by which they are transported to the plasma membrane and
presented to the extracellular environment. Draw a diagram to
support your answer.