FREE RADIOLOGY AND STUDY GAMES ABOUT RADBIO1

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FREE RADIOLOGY AND STUDY GAMES ABOUT RADBIO1

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

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-Guarantee passing score -82 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Direct Effects Caused by what? Describe point of origin.

Answer:

Caused by direct ionization along charge particle tracks. Original ionization occurs directly on target molecule.Question 2: Explain the purpose of Genes:

Answer:

Genetic material responsible for cytoplasmic activity and delivering hereditary information.Question 3: Define Radiosensitivity:

Answer:

The amount of reaction of a cell to radiation.

Question 4: What stage of mitosis is considered the most radiosensitive?

Answer:

Mitosis and the passage from late G1 into early S-phase are the phases considered most radiosensitive.

Question 5: Describe the function and components of Lysosomes:

Answer:

Single membrane bodies that contain digestive enzymes that digest protein molecules. They also assist in digesting old cell parts, dead cell parts, bacteria, and foreign materials.Question 6: Explain the purpose of Chromosomes:

Answer:

Gene carriers.

Question 7: Meiosis takes place in what kind of cells?

Answer:

takes place within gamete cells (sex cells).

Question 8: List the last 2 laws of Bergonie and Tribondeau.

Answer:

~The Higher metabolic cell activity, the more radiosensitive it is.~The greater growth rate for tissues, the greater the radiosensitivity.

~The greater growth rate for tissues,greater the radiosensitivity.Question 9: linear, nonthreshold:

Answer:

An observed response is directly proportional to the dose, assuming any radiation dose produces an effect.Question 10: Define Somatic cells:

Answer:

Non-reproductive cells.Question 11: Protraction:

Answer:

Is the time during which a course of radiation is administered over a longer period of time.

Question 12: ID the SI units for the traditional unit: Roentgen (R):

Answer:

SI Unit: coulomb/kilogram

Question 13: Explain the concept of "oxygen enhancement ratio(OER):

Answer:

The response of biologic tissue to radiation is great when irradiated in the aerobic state, than in anoxic state. This concept is expressed numerically by the OER.Question 14: Describe G1:

Answer:

Cells in this phase are performing the physiological needs to maintain cell homeostasis. The cell is not yet undergoing visible phases of mitosis.Question 15: Describe M:

Answer:

Cell division of mitosis begins.

Question 16: List the first 2 laws of Bergonie and Tribondeau.

Answer:

~Stem or immature cells are most sensitive compared to mature cells.~Younger tissues and organs are more sensitive than older tissues/organs.Question 17: Define: Mutagenesis

Answer:

The causing of genetic mutation by radiation.Question 18: Explain the formula used to calculate the OER:

Answer:

The Ratio is the dose that produces a given biologic response under anoxic conditions divided by the dose that produces the same biologic response under aerobic conditions Question 19: Define Erythema dose:

Answer:

Reddening of the skin.

Question 20: State the location of both the following:

DNA:

RNA:

Answer:

DNA: Nucleus.

RNA: Ribosomes of the nucleolus.

Question 21: Describe the function and components of organelles:

Answer:

Helps with cell functions.Includes the centrioles, endoplasmic reticulum, mitochondria, golgi apparatus, lysosomes and the nucleus.Question 22: Describe G2:

Answer:

Growth and preparation for mitosis.Question 23: Give examples of cells that are highly radiosensitive:

Answer:

Lymphocytes, spermatogonia, erythroblasts, intestinal crypt cells.Question 24: Describe the function and components of Nucleolus:

Answer:

Each nucleus contains atleast one of these structures that contains ribosomes.Question 25: What kind of rays produce few interactions bc of their rapid moving electrons are regarded as low LET radiation?

Answer:

X- and gamma rays.Question 26: Indirect Effect:

Answer:

A cell interaction that occurs if the initial ionizing incident takes place on a distant noncritical molecule then transfers the ionization of energy to another molecule.