Question

the major effect of benzene from long-term exposure is on the . (long-term exposure means exposure of a year or more.) benzene causes harmful effects on the and can cause a decrease in red blood cells, leading to . it can also cause excessive bleeding and can affect the immune system, increasing the chance for infection.

Explanation:

Identify the primary target organ of chronic benzene exposure

Using the Benzene Health Effects and Chemical Toxicology knowledge points
Chronic exposure to benzene primarily targets the blood-forming organs, specifically the bone marrow. Therefore, the major long-term effect is on the blood.

Determine the physiological impacts on blood-forming tissues

Using the Benzene Health Effects and Chemical Toxicology knowledge points
Benzene causes harmful effects on the bone marrow, which is responsible for producing blood cells.

Identify the condition caused by a decrease in red blood cells

Using the Benzene Health Effects and Chemical Toxicology knowledge points
A significant decrease in red blood cells leads to anemia.

Answer:

The major effect of benzene from long-term exposure is on the <blank>blood</blank>. (Long-term exposure means exposure of a year or more.) Benzene causes harmful effects on the <blank>bone marrow</blank> and can cause a decrease in red blood cells, leading to <blank>anemia</blank>. It can also cause excessive bleeding and can affect the immune system, increasing the chance for infection.