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Carcinogens are factors related to the formation of various malignancies. Which factor has the greatest impact on the development of all cancers?

A.

chemical agents

B.

environmental factors

C.

viruses

D.

defective genes

Answer and Explanation

The Correct Answer is B

A. Chemical agents: Chemical agents (e.g., tobacco smoke, asbestos) are significant carcinogens but are not the most influential across all types of cancer.

B. Environmental factors: Environmental factors, including exposure to radiation, chemicals, and lifestyle choices, have a broad impact on cancer development. This is the most comprehensive factor, as it encompasses various elements that contribute to cancer risk.

C. Viruses: Certain viruses (e.g., HPV, Hepatitis B) are linked to specific cancers, but they are not the primary cause of most cancers.

D. Defective genes: Genetic mutations play a critical role in cancer development, but they are often triggered by environmental factors, making environmental factors the most significant overall.


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Related Questions

Correct Answer is B

Explanation

A. Dental procedures: Fear of dental procedures is more indicative of a specific phobia, not social phobia.

B. Meeting strangers: Social phobia (social anxiety disorder) involves intense fear and anxiety in social situations where one might be judged, embarrassed, or scrutinized by others. Meeting strangers is a common fear for those with social phobia.

C. Being bitten by a dog: This is more consistent with a specific phobia related to animals, not social phobia.

D. Having a car accident: Fear of car accidents is not typically related to social phobia but could be linked to a specific or generalized anxiety disorder.

Correct Answer is D

Explanation

A. Benzodiazepines: Benzodiazepines are commonly prescribed for short-term management of anxiety disorders due to their rapid anxiolytic effects.

B. SSRIs: Selective serotonin reuptake inhibitors (SSRIs) are frequently used as first-line treatment for various anxiety disorders due to their efficacy and favorable side effect profile.

C. Tricyclic antidepressants: Tricyclic antidepressants (TCAs) are also used in the treatment of anxiety disorders, although they are less commonly prescribed than SSRIs due to their side effect profile.

D. Calcium channel blockers: Calcium channel blockers are not typically used to treat anxiety disorders. They are mainly used for cardiovascular conditions, such as hypertension and arrhythmias.

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