Which type of reins a rider uses, split reins or one rein, is a matter of personal preference. Split reins are commonly seen in the Western riding disciplines, although some Western riders might use one rein. Split reins are heavily preferred by most working cowboys and cowgirls.
Antimicrotubule agent, mitotic inhibitor Oncology An agent that inhibits cancer growth by stopping cell division Pharmacology A drug that inhibits or blocks mitosis in a particular phase of the cell cycleâeg, metaphase arrest caused by colchicine and vinca alkaloids. See Chemotherapy.
Overview of mitosis. Mitosis is the process by which non-sex cells divide to make new cells. After a fertilization event, mitosis kicks in to begin making copies of the newly formed zygote. The first cell will duplicate itself through mitosis. The two resulting cells will also be duplicated. And the process will continue exponentially throughout the organism's lifetime.