Sophia - Human Biology - Unit 4 Challenge 4.

Sophia - Human Biology - Unit 4
Challenge 4.

1 — Lymphatic System
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.