Question: Which Part Of The Body Is Most Sensitive To Radiation?

Which organ is most radiosensitive?

The digestive tract is among the most radiosensitive organs in the body and its function, which is partly regulated by gastrointestinal (GI) peptides, can be affected by radiation exposure..

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…•

What part of a woman’s breast is most sensitive?

We found that the skin of the superior quadrant was the most sensitive part of the breast, the areola was less sensitive, and the nipple was the least sensitive part. The cutaneous sensibility of all tested areas decreased significantly with increasing breast size and increasing breast ptosis.

Which part of the body is most sensitive to touch?

The tongue, lips, and fingertips are the most touch- sensitive parts of the body, the trunk the least. Each fingertip has more than 3,000 touch receptors, many of which respond primarily to pressure.

Which part of the cell cycle is most sensitive to radiation?

Cells in late G2 and mitosis (M-phase) are the most sensitive to radiation, and cells in late synthesis (S-phase) are the most resistant (Fig.

Why are rapidly dividing cells more sensitive to radiation?

The answer to your question boils down to the structure of DNA. … In this state, the DNA is highly susceptible to ionizing radiation, and because the cell has many different mechanisms to detect and respond to DNA damage, it can make the decision whether to abandon ship (and undergo apoptosis) or to repair the damage.

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.

What do you measure radiation with?

The radiation dose absorbed by a person (that is, the amount of energy deposited in human tissue by radiation) is measured using the conventional unit rad or the SI unit gray (Gy). The biological risk of exposure to radiation is measured using the conventional unit rem or the SI unit sievert (Sv).

Does radiation shorten your life?

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. bone marrow transplant recipients are eight times more likely to become frail than their healthy siblings.

Where to touch a man to turn him on instantly?

Seduce, Arouse & Turn Him On: Know Where To Touch A ManHis nipples. Don’t be surprised ladies, it’s not just your nips that love the attention! … The back of his neck. Okay, this one is a no-brainer. … His fingertips. Men are extremely visual creatures. … His scrotum. … His feet. … The back of his knees. … His perineum. … The tongue.More items…•

Where is a woman’s most pleasurable spot?

For most females, the most sensitive and important erogenous zone is the clitoris. Most females require clitoral stimulation to orgasm. For some, stimulation of the G-spot may indirectly stimulate the clitoris or its roots, which extend into the wall of the vagina.

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.

Which organ is least sensitive to radiation?

Reproductive and gastrointestinal cells are not regenerating as quickly and are less sensitive. The nerve and muscle cells are the slowest to regenerate and are the least sensitive cells. Cells, like the human body, have a tremendous ability to repair damage. As a result, not all radiation effects are irreversible.

Can animals survive radiation?

Unsourced material may be challenged and removed. Radioresistance is the level of ionizing radiation that organisms are able to withstand. … For example, the study of environment, animals and plants around the Chernobyl disaster area has revealed an unexpected survival of many species, despite the high radiation levels.

What is the law of Bergonie and Tribondeau?

Law of Bergonié and Tribondeau. … The law of Bergonie and Tribondeau is that the radiosensitivity of a biological tissue is directly proportional to the mitotic activity and inversely proportional to the degree of differentiation of its cells.

What does radiation feel like?

The severity of the symptoms and illness depends upon the type and amount of radiation, length of exposure and the part of the body exposed. Initial symptoms include nausea, vomiting, headache and diarrhoea. These symptoms can start within minutes or days after the exposure.

What is the first sign of too much radiation?

The initial signs and symptoms of treatable radiation sickness are usually nausea and vomiting. The amount of time between exposure and when these symptoms develop is a clue to how much radiation a person has absorbed.

What are deterministic effects of radiation?

Deterministic effects are those responses which increase in severity with increased dose if the dose increases the severity of an effect increases. All early effect and most tissue late effect is deterministic.

How does radiation affect mitosis?

Radiation in sufficient doses can inhibit mitosis, that is, the cell’s ability to divide and proliferate indefinitely. The inhibition of cellular proliferation is the mechanism by which radiation kills most mammalian cells.

What is radio sensitivity?

Radiosensitivity. Radiosensitivity refers to the inherent response of cancer cells to radiation, and radioresponsiveness refers to how quickly a tumor regresses after radiation. From: Clinical Radiation Oncology (Fourth Edition), 2016.