fourthyearmed Senior Member 5+ Year Member. Yes, 3rd year is long, hard, a lot of work, and has tests but I still enjoyed it so much more than the HELL that was 1st and 2nd years. 3rd year involves interaction not just with patients but with other people in the medical field besides your classmates.
The mitotic spindle is the macromolecular machine that segregates chromosomes to two daughter cells during mitosis. The major structural elements of the spindle are microtubule polymers, whose intrinsic polarity and dynamic properties are critical for bipolar spindle organization and function.he mitotic spindle is the macromolecular machine that segregates chromosomes to two daughter cells during mitosis. The major structural elements of the spindle are microtubule polymers, whose intrinsic polarity and dynamic properties are critical for bipolar spindle organization and function.
spindle fibers A collection of microtubules attached to a centromere during mitosis and meiosis that are responsible for the movement of the chromosomes to opposite poles. Spindle fibers align the chromosomes along the middle of the cell nucleus.ome attach to one kinetochore of a dyad with those growing from the opposite centrosome binding to the other kinetochore of that dyad. Some bind to the arms of the chromosomes. Spindle fibers are made of microtubules. Microtubules are lengthened and shortened by the addition and loss of tubulin subunits.