Thursday, May 4, 2017

2.Cell Organelles: Plasma Membrane

The Plasma Membrane

- The plasma membrane, or cell membrane, is an organelle made up of lipids and proteins and forms     a boundary around the cytoplasm
- Can surround/enclose a vacuole
- Regulates the passage of molecules in and out of the cytoplasm
- Found in both prokaryotic and eukaryotic cells
- In animal cells, the plasma membrane is in the outer most layer of the cell 
- In plant cells, it is located just beneath the cell wall
Phospholipid bilayer

Structure and Function:

- Composed of a phospholipid bilayer 
           -A phospholipid bilayer is a double lipid membrane, the                 head of the phospholipid keeps the tail of it from getting                 wet, the tail is a fatty acid
- Contains proteins throughout 
- Some proteins serve as channels to let molecules enter and leave   the cell, these are known as integral proteins
- The plasma membrane is selectively permeable to ions and organic molecules
- Boundary that separates the living cell from non-living surroundings
-Marks the boundary between the inside and outside of the cell

Prokaryotic cell
Reflection:
For this blog, I learned a lot about how proteins are involved in the membrane. I already knew a lot about the plasma membrane because we learned about it during class. I was surprised to see what it actually looked like up close. I learned more about where it's located in both plant and animal cells. The plasma membrane can't really be used outside of biology, since it is involved in cells.

Citations:

Study.com. Study.com, n.d. Web. 01 May 2017.

"Plasma Membrane." Plasma Membrane | Structure, Function of Plasma Membrane | Biology@TutorVista.com. N.p., n.d. Web. 01 May 2017.

"What biomolecules are found in the cell membrane? | Socratic." Socratic.org. N.p., n.d. Web. 01 May 2017. 

2 comments:

  1. Does the thickness of the plasma membrane vary between certain kinds of cells?

    ReplyDelete