Which type of tissue has a higher mitotic index normal or cancerous?
Durations of the cell cycle and mitosis vary in different cell types. An elevated mitotic index indicates more cells are dividing. In cancer cells, the mitotic index may be elevated compared to normal growth of tissues or cellular repair of the site of an injury.
Which tissue has the highest rate of mitosis?
Skin cells, hair follicles and the cells lining our intestines (epithelial cells) all have high rates of mitosis as these tissues constantly need to be replaced. In plants growth occurs largely at the shoot and root tips. These cells have much higher rates of mitosis than the rest of the plant.
Does epithelial tissue have a high mitotic rate?
6. Has a high mitotic rate, therefore a high capacity for renewal If you cut yourself cutting a bagel they will be replaced by cells doing mitosis.
Does epithelial tissue have a low mitotic rate?
Generally, the non-keratinized tissues of the oral cavity had mitotic rates higher than those of the keratinized oral regions, with the epidermis having the lowest value. The mitotic index also correlated significantly with epithelial thickness, with the thicker regions showing a higher rate of proliferation.
What factors affect mitotic index?
Other factors that may affect the mitotic rate are salinity, temperature, mineral limiting factors, pH, roundworms, soil bac teria or fungus, other plant hormones, amount of light, acetaminophen, aspirin, ibuprofen, vitamins and minerals, heavy metals, antibiotics, and certain plant competitors that excrete inhibiting …
What is a high mitotic rate?
The higher the mitotic count, the more likely the tumor is to have metastasized (spread). The logic is that the more cells are dividing, the more likely they will invade the blood or lymphatic vessels and thus spread around the body.
What is mitotic index used for?
The mitotic index (percentage of cells in mitosis at any time) provides a measure of the capacity of cells to divide and of the rate of cell division. It is used to identify the sites of growth within a tissue and to determine which cell types are dividing.
What would you expect to happen to the mitotic index of a population of cells that loses the ability to divide as they mature?
What would happen to the mitotic index to a population of cells that mature? The mitotic index would drop as the loss of their ability to divide will result in a smaller ratio of cells in mitosis to overall cells.