Sophia Human Biology Unit 4 Challenge 4

Identify the major structures and function of the lymphatic system. Which of the following is a function of the lymphatic system?  a.) Circulating nutrients to various organs  b.) Sending signals from the brain to the extremities  c.) Returning excess fluid to the circulatory system  d.) Pumping blood through the body 2 — Pathogens Determine how the human body protects itself from pathogens. Which of the following statements about innate immunity is true?  a.) Innate immunity involves a targeted response against pathogens the body has fought before  b.) Innate immunity describes how physical barriers prevent many pathogens from entering the body  c.) Innate immunity is a generalized response that does not target specific pathogens  d.) Innate immunity means a type of pathogen doesn't have any effect on the human body 3 — Innate Immunity Identify the characteristics of the body's second line of defense against pathogens. A fever is an example of what kind of defense against pathogens?  a.) Adaptive immunity  b.) Innate immunity  c.) All answer choices are correct  d.) Physical barriers 4 — Adaptive Immunity Identify the characteristics of the body's third line of defense against pathogens. Which of the following is a characteristic of adaptive immunity?  a.) It involves the complement system, which causes damage to pathogens.  b.) It relies on lysosomes to break down pathogens.  c.) Innate immunity is one type of adaptive immunity.  d.) It comes into play once a pathogen gets past the body's more general immune responses.