PNB 2265-IMMUNE SYSTEM EXAM
QUESTIONS AND ANSWERS
non-specific immune system - Correct Answers -generalized responses that help to
support the immune system, support imm. sys. function, recycle cells, and non-
specifically destroy foreign cells and materials
specific immune system - Correct Answers -protects against specific antigens; has the
ability to differentiate between self-antigens and foreign antigens
Which hormone causes hematopoietic stem cells to differentiate into leukocytes?
a. EPO
b. colony-stimulating factor (CSF)
c. surfactant
d. lectin - Correct Answers -colony-stimulating factor (CSF)
Passing antibodies from a mother to infant through breastfeeding is an example of what
type of immunity?
a. active
b. passive - Correct Answers -passive
hygiene hypothesis - Correct Answers -a hypothesis that suggests the environments of
Western children are unnaturally clean, dramatically decreasing their exposure to
routine microorganisms
Which types of WBCs complete their maturation in the bone marrow? (multiple
answers)
a. T lymphocytes
b. B lymphocytes
c. neutrophils
d. natural killer cells (NKCs) - Correct Answers -B lymphocytes and natural killer cells
(NKCs)
cytokines - Correct Answers -chemical messengers that boost the immune system
The classic complement pathway is activated when complement protein _____ interacts
with an antigen-antibody complex.
a. C1
b. C3
c. C4 - Correct Answers -C1
Which branch of the immune system produces antibodies?
a. specific
QUESTIONS AND ANSWERS
non-specific immune system - Correct Answers -generalized responses that help to
support the immune system, support imm. sys. function, recycle cells, and non-
specifically destroy foreign cells and materials
specific immune system - Correct Answers -protects against specific antigens; has the
ability to differentiate between self-antigens and foreign antigens
Which hormone causes hematopoietic stem cells to differentiate into leukocytes?
a. EPO
b. colony-stimulating factor (CSF)
c. surfactant
d. lectin - Correct Answers -colony-stimulating factor (CSF)
Passing antibodies from a mother to infant through breastfeeding is an example of what
type of immunity?
a. active
b. passive - Correct Answers -passive
hygiene hypothesis - Correct Answers -a hypothesis that suggests the environments of
Western children are unnaturally clean, dramatically decreasing their exposure to
routine microorganisms
Which types of WBCs complete their maturation in the bone marrow? (multiple
answers)
a. T lymphocytes
b. B lymphocytes
c. neutrophils
d. natural killer cells (NKCs) - Correct Answers -B lymphocytes and natural killer cells
(NKCs)
cytokines - Correct Answers -chemical messengers that boost the immune system
The classic complement pathway is activated when complement protein _____ interacts
with an antigen-antibody complex.
a. C1
b. C3
c. C4 - Correct Answers -C1
Which branch of the immune system produces antibodies?
a. specific
