Lecture Quiz 10

A  FALSE

B  TRUE

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

B  memory CD8 cells are produced

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

D  activated CD8 cells are produced

E  CD8 cells divide

A  FALSE

B  TRUE

A  alveolar type II

B  macrophages

C  dust cells

D  alveolar type I

E  squamous cells

A  temperature and surfactant

B  2,3-DPG concentration and pH

C  temperature and pH

D  pO2 and pH

A  FALSE

B  TRUE

A  volume of lungs increases

B  diaphragm contracts increasing the length of the thoracic cavity

C  ↑ volume of lungs → ↑ intrapulmonary pressure

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

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

A  FALSE

B  TRUE

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

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

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

D  plasma cells secrete antibodies against the antigen

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

A  TRUE

B  FALSE

A  all the above

B  enhancement of phagocytosis of pathogens (opsinization)

C  enhancement of the inflammatory response by mast cells

D  attraction of neutrophils and macrophages (chemotaxis)

E  formation of membrane attack complexes

A  FALSE

B  TRUE