System except: 7. All of the following describe functions of the integumentary
a. Skin helps to increase water loss from deeper tissues.
b. Skin cells produce a vitamin D precursor.
c. Skin helps regulate body temperature. d. Skin prevents harmful substances from entering the body

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

Is it bad to have a headache all day long?

How will your knowledge of hipaa regulations affect your career in healthcare