A high energy x-ray photon interacts directly with a DNA strand causing a cross-link between two places within the same strand.  This joining is termed a/an _____.

The middle layer of the skin is called the:

Which of the following are accurate regarding the epithelial tissue in the body? They are radiosensitive cells that line and cover body tissue. They are found in the mucousal lining of the respiratory tract. The regenerate through a process called mitosis.

In reference to point mutations: Dominent mutations are usually expressed in the offspring Recessive mutations may be not be expressed for several generations Radiation is thought to primarily cause recessive mutations

Which of the following statements are true in regards to low-LET radiation? It possesses substantial mass and charge. It has a wave-particle duality. It is sparsely ionizing. It is more likely to cause damage through direct action.

When cells are exposed to sublethal doses of ionizing radiation, approximately _____ of radiation-induced damage may be repaired over time, and about _____ is irreparable.

Which of the following theories states that in order for a cell to die after radiation exposure, its target molecule must be inactivated?

The subcutaneous layer fat and connective tissue on the skin is called the:

Which of the following are described as having a sigmoid, threshold dose-response relationship?

Heredity disorders are common in any population.  In humans, a genetic disorder is present in approximately _____ of all live births in the United States.