Cell & the Immune System Flashcards
What is the structure of the cell membrane?
Phospholipid bi-layer with hydrophillic heads and hydrohobic tails
What is the function of membrane proteins?
- Cell-cell recognition
- Attachment of ECM
- Signal processing
- form a channel that molecules can travel through
- Can sit on inside of cell only as part of signal cascade
What are the two types of membrane transport?
Passive and active
Diffusion is a type of ____ transport.
Passive
What are the 3 main types of cell communication?
paracrine/synapse (local) hormonal (long distance)
What are the three steps of the signal pathway of a cell?
reception, transduction, response
What is apoptosis?
stimulated cell death, occurs regularly
What is necrosis?
cell suicide, occurs under stress
Blocking of cell death can be caused by _____.
tumors and cancer
What is innate immunity?
Immunity that is present at birth and lasts a person’s entire life
What is acquired immunity?
immunity that has developed due to a need
Give examples of innate immunity.
phagocytic cells, antimicrobial proteins, natural killer cells
Give examples of acquired immunity
Cytotoxic lymphocytes
What is the largest barrier defense?
the skin
What is the second barrier defense?
mucous and secretions (saliva, ear wax, etc)
