Mod:1 Lesson 9: What is the immune system?

Question 1

What is the immune system?

Answer 1

a complex collection of cells, tissues, and substances that protect the body against
pathogens

Question 2

Identify four processes in which the immune system is believed to play a part.

Answer 2

defense against infection; immunity to reinfection; identification and destruction of foreign substances; immune surveillance

Question 3

True / False Like other body systems, the immune system is localized to particular regions of the body.

Answer 3

False

Question 4

True / False Immunity to reinfection is the rationale for vaccination against viruses.

Answer 4

True

Question 5

True / False Autoimmunity occurs when the immune system’s ability to distinguish between self and non-self tissue is impaired.

Answer 5

True

Question 6

True / False Normal immune responses may help defend against certain types of cancer.

Answer 6

True