What is the spindle in a cell
Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during both types of nuclear division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.
What is the mitotic spindle made of quizlet
The mitotic spindle begins to form. The spindle is a structure made of microtubules, strong fibers that are part of the cell's "skeleton." Its job is to organize the chromosomes and move them around during mitosis. In prophase, the spindle grows between the centrosomes as they move apart.
What structures pull the chromosomes apart
The movement of chromosomes is facilitated by a structure called the mitotic spindle, which consists of microtubules and associated proteins. Spindles extend from centrioles on each of the two sides (or poles) of the cell, attach to the chromosomes and align them, and pull the sister chromatids apart.
What is cytokinesis quizlet
Cytokinesis. the physical process of cell division which divides the cytoplasm of the cell into two daughter cells. It occurs with two types of nuclear division. mitosis and meiosis.
What organelle is in the center of the mitotic spindle
The centrosome is an organelle that serves as a microtubule organizing center during division. It's duplicated during S phase, and the two copies move to opposite sides of the cell. Now, once the mitotic spindle has been assembled, the centrosomes are also referred to as spindle poles.
What is the function of the Monosynaptic stretch reflex quizlet
The stretch reflex (myotatic reflex) is a muscle contraction in response to stretching within the muscle. It is a monosynaptic reflex which provides automatic regulation of skeletal muscle length. When a muscle lengthens, the muscle spindle is stretched and its nerve activity increases.
What is the process that splits the two identical daughter cells apart
Mitosis is the process in which a eukaryotic cell nucleus splits in two, followed by division of the parent cell into two daughter cells. The word "mitosis" means "threads," and it refers to the threadlike appearance of chromosomes as the cell prepares to divide.
What is the first step in cell division
The first step of cell division is prophase, during which the nucleus dissolves and the chromosomes begin migration to the midline of the cell. (Some biology textbooks insert a phase called "prometaphase" at this point.)
What happens in anaphase of mitosis quizlet
What happens during Anaphase? The spindle fibers SPLIT APART the sister chromatids and move them to opposite ends of the cell, equally dividing the genetic material.
What is a mass of rapidly dividing cells that can damage surrounding tissue
Tumor. A mass of rapidly dividing cells that can damage surrounding tissue.
When errors occur in DNA What activity do checkpoint controls inhibit
What two pathways are disrupted in cancer cells? When errors occur in DNA, what activity do checkpoint controls inhibit? When errors occur the checkpoint alerts enzymes to begin cell cycle arrest to repair the damage, but if the error is too bad, apoptosis occurs.
What is a kinetochore read your text carefully
What is a kinetochore? Read your text carefully, and then make a labeled sketch that shows a replicated chromosome. Each of the two sister chromatids of a duplicated chromosome has a kinetochore, a structure of proteins associated with specific sections of chromosomal DNA at each centromere. G2 of Interphase.
How do eukaryotic cells chromosomes change as a cell prepares to divide
Before a cell begins to divide, its chromosomes are first replicated into two copies, one for each daughter cell. Once the chromosomes are replicated, they begin to condense and coil tightly.
What is the role of spindle during mitosis
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.
What role does the spindle play in cell division
function in cell division
The spindle is the structure that pulls the chromatids to opposite ends of the cell during the cell division processes of mitosis and meiosis. Once separated, each chromatid becomes a chromosome.
What is the spindle composed of
The spindle is built of microtubules that are used as tracks to move chromosomes precisely during cell division. In the spindle, microtubules are arranged in two antiparallel arrays with their plus ends at the equator and their minus ends at the poles, whatever the detailed shape of the spindle (Fig. 1) (1–3).
What do centrioles do
Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope. Centrioles play a role in organizing microtubules that serve as the cell's skeletal system. They help determine the locations of the nucleus and other organelles within the cell.
Where are spindle cells found in the body
Spindle cell lesions can occur in head and neck skin, in the soft tissues of the scalp, orbit, and neck, and along the upper aerodigestive tract (UADT) mucosa.