What is the main function of the respiratory system?
a. to send signals from one part of the body to other parts of the body
b. to break down food into nutrients that can be circulated throughout the body
c. to exchange oxygen and carbon dioxide gases within the body
d. to protect the body against foreign substances, such as bacteria and viruses

Which of these is a symptom o anorexia nervosa

Larry is taking a walk in the park, the pollen in the air makes him sneeze consistently what line of defense is his immune system exhibiting

Melanocytes and keratinocytes work together in protecting the skin from uv damage when keratinocytes a. provide the melanocyte with a protective shield against abrasion b. maintain the appropriate temperature so the product of the melanocyte will not denature c. maintain the appropriate ph in order for the melanocyte to synthesize melanin granules d. accumulate the melanin granules on their superficial portion, forming a uv-blocking pigment layer