Lecture Quiz 10

A  TRUE

B  FALSE

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

C  CD8 cells divide

D  activated CD8 cells are produced

E  memory CD8 cells are produced

A  FALSE

B  TRUE

A  alveolar type I

B  macrophages

C  dust cells

D  alveolar type II

E  squamous cells

A  temperature and pH

B  temperature and surfactant

C  2,3-DPG concentration and pH

D  pO2 and pH

A  FALSE

B  TRUE

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

B  diaphragm contracts increasing the length of the thoracic cavity

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

D  ↑ volume of lungs → ↑ intrapulmonary pressure

E  volume of lungs increases

A  TRUE

B  FALSE

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

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

C  plasma cells secrete antibodies against the antigen

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

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

A  FALSE

B  TRUE

A  formation of membrane attack complexes

B  enhancement of the inflammatory response by mast cells

C  all the above

D  attraction of neutrophils and macrophages (chemotaxis)

E  enhancement of phagocytosis of pathogens (opsinization)

A  FALSE

B  TRUE