Question

Functional damage, particularly to the CNS, which may manifest as subtle changes in learning patterns and development, may result from radiation exposure during:

1. second trimester
2. fist two weeks
3. third trimester
4. 1st trimester

Answer 1

Radiation exposure during the 1st trimester of pregnancy can cause functional damage to the CNS and affect learning patterns and development due to the high vulnerability of rapidly dividing embryonic cells.

Step-by-step explanation:

Functional damage to the CNS, manifesting as changes in learning patterns and development, can result from radiation exposure during the 1st trimester of pregnancy. During this time, the developing embryo is particularly vulnerable because the cells are rapidly dividing, making them more susceptible to damage from radiation. This is a critical period for the formation of the central nervous system and major organs, which is why the 1st trimester is the most sensitive to radiation's harmful effects. Radiation therapy during pregnancy requires special care to minimize exposure to the developing fetus. Effects of radiation are cumulative and can lead to developmental disorders and genetic defects. The 1st trimester is the crucial time frame when the risk of such damage is the highest.