Lecture Quiz 10

A  FALSE

B  TRUE

A  activated CD8 cells are produced

B  CD8 cells divide

C  it is then costimulated by IL-2 from helper T cells

D  the receptor of an inactive CD8 cell attaches to a specific antigen on the MHC I receptor of an antigen-presenting cell (APC)

E  memory CD8 cells are produced

A  TRUE

B  FALSE

A  macrophages

B  dust cells

C  squamous cells

D  alveolar type I

E  alveolar type II

A  temperature and surfactant

B  pO2 and pH

C  temperature and pH

D  2,3-DPG concentration and pH

A  FALSE

B  TRUE

A  increase in the size of the thoracic cavity → increase in its volume → decrease in the intrathoracic pressure

B  intercostal muscles contract moving the ribs up and out → increases the width and depth of the thoracic cavity

C  volume of lungs increases

D  diaphragm contracts increasing the length of the thoracic cavity

E  ↑ volume of lungs → ↑ intrapulmonary pressure

A  FALSE

B  TRUE

A  plasma cells secrete antibodies against the antigen

B  antigen is processed by an antigen presenting cell (APC) and attaches antigen fragment to its’ MHC I receptor

C  activated CD4 cell then attaches to the MHC II receptor/antigen complex of a B cell and releases cytokines (IL-2)

D  a helper T (CD4) cell, whose T cell receptor matches the antigen attaches, and is activated

E  cytokines stimulate the B cell to produce plasma and memory cells

A  FALSE

B  TRUE

A  attraction of neutrophils and macrophages (chemotaxis)

B  enhancement of the inflammatory response by mast cells

C  formation of membrane attack complexes

D  all the above

E  enhancement of phagocytosis of pathogens (opsinization)

A  TRUE

B  FALSE