Structure and Composition of Cell Membrane
Despite differences in structure and function, all living cells in multicellular organisms are surrounded by a cell membrane. Just like the outer layer of the skin separates the body from its environment similarly, the cell membrane, also known as 'plasma membrane,' separates the inner content from its exterior environment.
Cell Membrane
The cell membrane is known by different names like plasma membrane or cytoplasmic membrane, or biological membrane. The term "cell membrane" was first introduced by C. Nageli and C. Cramer in the year 1855. Later on, in 1931, the term "plasmalemma" for cell membrane was given by J. Plowe. The cell membrane separates the cell's internal environment from the extracellular space. This separation allows the protection of cells from their environment.
Prokaryotes vs Eukaryotes
The cell is defined as the basic structural and functional unit of life. The cell membrane bounds it. It is capable of independent existence.
![Laboratory Activity - The animal cell and its components
A. Identify the following parts of the cell using a 3-D model of an animal celI
Plasma
membrane
Centrosome
Cytoplasm
17 18 19
Vacuole
15
16
Golgi ve sicle
Part of the cell or organelle
Wucleus
Nucleolus
Mitochondria
Smoothendoplasmic reticulum
Plasmodesmata
Outer nuclear membrane
Number
1
2.
Secretory
vesicles
3
Golgiapparatus 4
-20
Peroxisomes
Mitochendria
nueleus
14
Chloroplast"
7
Cytoskeleton
Middle lamelle
Lysosomes
8.
Rough
9.
endoplasmic
reticulum
-2nucleolus
10
Smooth
endoplasmic
11
Ribosomes
reticulum
rough endoplasmic reticulum
Chleroplast
Secretory vesicles
Vacuole
Centrosomer
Cytoplesm
Plasme membrane
Golgi vesicle
Golgi apparatus
Peroxisomes
12
11
13
10-
Lysosomes
Plasmodesmatd 14
15
16
17
18
19
20
21
Middle
lamella,
cytoskeleton
Outer
membrane](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F70570a45-57a4-4050-9a9e-a043574e0934%2Fda117ca1-6228-48c1-92f8-deb002a76e8b%2Fazl86as_processed.jpeg&w=3840&q=75)
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