integumentary system-- defensive barrier function

Question 1

what is the external surface of the integumentary layer in humans relatively impermeable to

Answer 1

water and atmospheric gases

Question 2

what does the defensive barrier function of the integumentary system prevents the loss of

Answer 2

water (dehydration) and soluble substances from the body

Question 3

what is the surface layer of the integument resistant to

Answer 3

radiation damage by ultraviolet wavelength light — components of the sun

Question 4

what is the surface layer of the integument also resistant to

Answer 4

penetration by potentially harmful toxic chemicals and infectious biological agents such as viruses, bacteria, fungi, and eukaryotic unicellular and multicellular parasites

Question 5

what critical role does the integument provide

Answer 5

first line of defense in the body’s immune system