In this diagram of a duplicated chromosome, (2) identifies the centromereâthe region that joins the two sister chromatids, or each half of the chromosome. In prophase of mitosis, specialized regions on centromeres called kinetochores attach chromosomes to spindle fibers. The centromere is the part of a chromosome that links sister chromatids or a dyad. During mitosis, spindle fibers attach to the centromere via the kinetochore. Centromeres were first thought to be genetic loci that direct the behavior of chromosomes.
Carotid Artery Pain in Left Side of Neck. The carotid artery pain in left side of neck means (if this is the case) that there may be carotid artery disease which is when the arteries that supply the brain (its front) with oxygenated blood, get narrowed.hen the carotid arteries get dilated or distended the carotidynia occurs. It has 3 types: classic, migrainous and arteriosclerotic, and all of them lead to pain in left side of neck, as well as to face, head or ear pain.
Neck Pain. Your neck (cervical spine) is made up of vertebrae that extend from the skull to the upper torso. Cervical disks absorb shock between the bones. The bones, ligaments, and muscles of your neck support your head and allow for motion. Any abnormalities, inflammation, or injury can cause neck pain or stiffness.Many people experience neck pain or stiffness in the neck occasionally. In many cases, it is due to poor posture, normal wear and tear, or overuse. Sometimes, neck pain is caused by injury from a fall, contact sports, or whiplash.ny abnormalities, inflammation, or injury can cause neck pain or stiffness. Many people experience neck pain or stiffness in the neck occasionally. In many cases, it is due to poor posture, normal wear and tear, or overuse.