He is suffering from combat stress reaction.

Norepinephrine is one of the hormones involved in stress responses.

A deficiency in male hormones can potentially lead to a decrease in physical strength and muscle power.

His involvement in the incident is suspected.

He is deeply involved in the project.

He ate one apple.

Hormones play an important role in the body of living organisms.

When stress builds up, it's easy to get sick.

This chemical reaction is very dangerous.

This chemical reacts when heat is added.