Quick Answer: How Does Age Affect The Radiosensitivity Of Tissue?

What factors affect radiosensitivity?

Radiosensitivity depends on several factors.

These factors include the ability to repair damage, hypoxia, cell cycle position, and growth fraction.

In addition, the volume of the initial tumor has been demonstrated to influence the ability to eradicate tumors..

Which tissue is most sensitive to radiation?

Amongst the body cells, the most sensitive are spermatogonia and erythroblasts, epidermal stem cells, gastrointestinal stem cells. The least sensitive are nerve cells and muscle fibers. Very sensitive cells are also oocytes and lymphocytes, although they are resting cells and do not meet the criteria described above.

What organs are affected by radiation?

Let’s do a head-to-toe walk-through to investigate how high doses of radiation can damage the human body.Brain. Nerve cells (neurons) and brain blood vessels can die, leading to seizures.Eyes. Radiation exposure increases the risk of cataracts.Thyroid. … Lungs. … Heart. … GI tract. … Reproductive organs. … Skin.More items…•

Does CT scan have any side effects?

Possible side effects of an abdominal CT scan The side effects of an abdominal CT scan are most often caused by a reaction to any contrast used. In most cases, they’re mild. However, if they become more severe, you should call your doctor right away.

What is a latent image quizlet?

latent image. invisible change that is induced in the silver halide crystals by: x ray photons that deposit energy within the crystal lattice off the silver halide crystals.

What is the process of cell division of the reproductive genetic cells called?

Meiosis also allows genetic variation through a process of DNA shuffling while the cells are dividing. Mitosis and meiosis, the two types of cell division.

Why is ionizing radiation more harmful to children than adults?

When given equal radiation doses, the risks for children and adolescents are greater than for adults. Children grow quickly, and their cells are more sensitive to radiation. Since effects of radiation take years to develop, their youth extends the time for any potential effects from ionizing radiation to occur.

How long for immune system to recover after radiation?

It might take from 10 days to many months for the immune system to recover completely.

Does radiation shorten your life?

Chemotherapy and radiation are two of the most common treatments for cancer. … In addition, the study’s authors reported that children who survive cancer have a 30 percent lower life expectancy than the general population. What’s more, these kids are three to six times more likely to develop a second cancer.

What types of cells are most sensitive to radiation damage quizlet?

Cells that divide very rapidly (spermatozoa and lymphocytes) are extremely sensitive to radiation because they are in the metaphase stage of mitosis more often.

Are children more sensitive to radiation than adults?

Exposure is especially concerning in children. For one thing, children are more sensitive to radiation than adults because their bodies are still growing. Children might also receive a higher radiation dose than necessary if equipment settings are not adjusted for their smaller body size.

What are the causes of invasive ductal carcinoma?

Causes and Risk FactorsAge.A history of benign breast disease.A family history of breast cancer.First pregnancy after the age of 30.Obesity.Using combination estrogen-progestin hormone replacement therapy for more than five years after menopause.

Does radiation make you look older?

Chemotherapy, radiation therapy and other cancer treatments cause aging at a genetic and cellular level, prompting DNA to start unraveling and cells to die off sooner than normal. … Radiation therapy has been linked to dementia, memory loss, hardened arteries and secondary cancers.

What happens if a child is exposed to radiation?

But radiation can damage living tissue and alter DNA, especially in large doses. In very large doses, it can cause severe sickness and death. Medical tests use much, much smaller doses of radiation. … The main concern is that radiation exposure may slightly raise your child’s risk of cancer later in life.

What is a stochastic effect?

Stochastic effects. Effects that occur by chance, generally occurring without a threshold level of dose, whose probability is proportional to the dose and whose severity is independent of the dose. In the context of radiation protection, the main stochastic effects are cancer and genetic effects.