Answer: Option A. "Cytoskeleton"
Explanation:
Cytoskeleton can be defined as the network of protein filaments in the cytoplasm eukaryotic cells interlinking from cell nucleus to cell membrane.
There are three basic types of protein fibers present in cytoskeleton that includes micro filaments (Actin filaments ), microtubules and intermediate filaments.
Microfilaments are consist many linked monomers of a protein known as actin, that combines in a double helix with a diameter of about 7 nano-meter and functions as serving tracks for myosin (motor protein).
Microtubules are arranged in a form of hollow straw like structure made up of consist of tubulin proteins having diameter of about 25 nano-meter and further consist of two subunits, α-tubulin and β-tubulin.
Intermediate filaments are the cytoskeletal element which are made up of multiple strands of fibrous proteins wounded together having an average diameter of 8 to 10 nano-meter.
Intoxication. Alcohol slows all of these.
Answer:
The cause of bone fusion in joints damaged by rheumatoid arthritis is due to the over activity of the synovium.
Explanation:
Synovium -
Synovium is a lining that covers the joints of the body , which is responsible for lubrication of the joints and to move easily .
The disorder rheumatoid arthritis is caused by the over activity of this lining , as it swells out and becomes inflamed , and hence, can destroy the joint and even the ligament and the tissues .
The weakening of these ligament can lead to deformities like claw toe or hammer toe.
