Emma was a 49 year old married mother of two children. She worked full time and as part of her job she drove extensively all over the US. On average she would drive 1500 miles a week in her company car. In June last year she had a tragic road traffic accident where she was hospitalized for severe injuries. Since the accident she was too afraid to drive, was very anxious, had frequent nightmares when she travelled as a passenger and was on sick leave from her employers. Emma may have been suffering from:

What is the function of the retina?

Christopher came down with chicken pox after spending time in his child’s day care. the chicken pox represents what link in the chain of transmission in this scenario?

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.