rad biology

Question 1

law of bergonie and tribondeau

Answer 1

The radio sensitivity of a cell is directly proportional to reproductive rate, and is inversely proportional to its degree of differentiation

Question 2

Radio sensitivity increases with

Answer 2

Increase rate of cell division
-Law degree of specialization
-Higher metabolic rate
-Increase oxygenation
Increased length of time they are actively proliferating. cell proliferation is the process by which a cell grows and divides to produce two daughter cells

Question 3

cell cycle stages

Answer 3

G1: first growth phase
S: synthesis phase: S phase is the least radiosensitive phase of the cell, because the cell contains two copies of its DNA
G2: second growth phase
M: the cell divides into two cells in the process called mitosis. Mitosis is the most radiosensitive phase, because both mitosis is sensitive to destruction, and because the cell is well oxygenated during this phase.

Question 4

Least radiosensitive

Answer 4

Synthesis phase

Question 5

most radiosensitive

Answer 5

mitosis
-due to cells being well oxygenated

Question 6

Lymphocytes

Answer 6

are the most radiosensitive blood cells
-whole body dose of 25 rads will depress flood count
-# 1!!!

Question 7

reproductive cells

Answer 7

very radiosensitive because there immature sperm cells

Question 8

muscle

Answer 8

relatively insensitive, because of high specialization and lack of cell division 

Question 9

nerve

Answer 9

low sensitivity, no division

Question 10

Most radiosensitive cells to least radiosensitive

Answer 10

1. blood cells (bone marrow, lymphatic tissue)
   -lymphocytes, stem cells
   2.reproductive cells
   -immature sperm cells
   3.GI= small intestine- duodenum is most radiosensitive
   4.epithelial tissue
2. muscle
3. nerve