NUR 221 Unit 1 Test UPDATED ACTUAL Exam Questions and CORRECT Answers

NUR 221 Unit 1 Test UPDATED ACTUAL
Exam Questions and CORRECT Answers
_______ is the body's ability to resist infectious disease - CORRECT ANSWER -
Immunity


Nonspecific immunity must be primed by an initial exposure to an antigen before it can protect
the body against disease.
True

False - CORRECT ANSWER - False


The immune system protects the body by distinguishing _____.
upper from lower
self from non-self
inside from outside

positive from negative - CORRECT ANSWER - self from non-self


Leukocytes that can engulf and destroy pathogens are known as _____.
mast cells
macrophages
neutrophils

phagocytes - CORRECT ANSWER - phagocytes


Nonspecific immunity is present at birth and provides immediate, short-term protection against
any antigen.
True

False - CORRECT ANSWER - True

,An __________ is any foreign substance that, when introduced into the body, activates the
immune system. - CORRECT ANSWER - antigen



Nonspecific immunity is also known as __________ immunity. - CORRECT ANSWER -
innate


Secretions such as tears, saliva, sweat, and sebum contain chemicals that destroy foreign
invaders.
True

False - CORRECT ANSWER - true


Natural killer cells are a type of _____.
leukocyte
erythrocyte
plasma cell

albumin - CORRECT ANSWER - leukocyte


_____ is a group of plasma proteins that assist in the destruction of foreign cells.
Complement
ELISA
Albumin

SLE - CORRECT ANSWER - complement


While complement is part of nonspecific immunity, it helps both nonspecific and specific
immunity.
True

False - CORRECT ANSWER - true

, Leukocytes like macrophages and neutrophils can engulf and destroy pathogens, a process called
__________. - CORRECT ANSWER - phagocytosis


__________ are antiviral proteins produced by some animal cells after a viral infection. -
CORRECT ANSWER - interferons


Natural killer cells recognize and eliminate virus-infected cells and bacteria-infected cells.
True

False - CORRECT ANSWER - false


Interferons increase the activity of _____.
erythrocytes and leukocytes
phagocytes and neutrophils
macrophages and natural killer cells

plasma and complement - CORRECT ANSWER - macrophages and natural killer cells


_____ can cause dehydration, nausea, disorientation, hallucinations, seizures, and convulsions.
Very low fevers
Very high fevers
Hypersensitivity

Hyposensitivity - CORRECT ANSWER - very high fevers


The inflammatory response can be triggered by infection, trauma, intense heat, and chemicals.
True

False - CORRECT ANSWER - true


A __________, or an abnormally high body temperature, is a systematic response to an infection.
- CORRECT ANSWER - fever