Identify the cytoskeletal element being described in each statement below. Note, possible answers include: • Microtubules only • Microfilaments only • Intermediate filaments only • Microtubules AND microfilaments • All 3 Found in cilia and flagella [ Choose ] Have intrinsic polarity [ Choose ] Are the least soluble [ Choose ] Have the smallest diameter [ Choose ] Form from protofilaments [ Choose ] that arrange into a hollow tube Play an essential role in [Choose ] muscle contraction Diameter is in between the [ Choose ]
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.
Identify the cytoskeletal element being described in each statement below. Note, possible answers include:
- Microtubules only
- Microfilaments only
- Intermediate filaments only
- Microtubules AND microfilaments
- All 3
![Play an essential role in
[ Choose ]
muscle contraction
Diameter is in between the
[ Choose ]
other 2
Maintain cell shape and
[ Choose ]
structure
Required for Cell Division
[ Choose ]
Have the largest diameter
[ Choose ]
Made from tubulin
[ Choose ]
Grouped into 6 categories
[ Choose ]
based on tissue location
Associate with motor
[ Choose ]
proteins
Made from actin
[ Choose ]
Form by polymerization of a
[ Choose ]
subunit
Found in filopodia and
[ Choose ]
lamellipodia](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc7252983-b4fb-47e2-8b7d-5760d763136f%2Fd1e33bf9-9177-45be-80a8-c42daef3cf11%2Fehpwtn7_processed.png&w=3840&q=75)
![Identify the cytoskeletal element being described in each
statement below. Note, possible answers include:
• Microtubules only
• Microfilaments only
• Intermediate filaments only
• Microtubules AND microfilaments
• All 3
Found in cilia and flagella
[ Choose ]
Have intrinsic polarity
[ Choose ]
Are the least soluble
[ Choose ]
Have the smallest diameter
[ Choose ]
Form from protofilaments
[ Choose ]
that arrange into a hollow
tube
Play an essential role in
[ Choose ]
muscle contraction
Diameter is in between the
[ Choose ]
other 2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc7252983-b4fb-47e2-8b7d-5760d763136f%2Fd1e33bf9-9177-45be-80a8-c42daef3cf11%2Fdpm7au_processed.png&w=3840&q=75)
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