BIOL 199 Study Guide - Final Guide: Complement Membrane Attack Complex, Innate Immune System, Macrophage
Virus – nonliving piece of genetic material in a
Virus – protein coat that can hijack body cells
Virus – picked up through human interaction
Bacteria – living cell that can be both good or bad
Bacteria – does not take over host cells, simply an
Bacteria – extra cell
Bacteria – respond to antibiotics (destroy cell wall,
Bacteria – interrupt metabolism), but can
Bacteria – develop resistance
Pathogens – foreign invaders
Antigens – how the immune system recognizes
Antigens – pathogens
Antigens – indicator on pathogen such as a protein, lipid, or sugar
Antigens – trigger an immune response
Infectious – will invade and grow in body tissues
Contagious – transmittable
Exotoxins – protein molecules made by bacteria present in body tissues
Exotoxins – a small amount can kill you
Endotoxins – lipid portion of a cell wall of a bacteria
Endotoxins – cell can release it when it dies
Barriers
• Can get sick through direct contact (person to person) or indirect contact
(person to object)
• The human body’s first line of defense is a series of chemical and physical barriers
1. Skin
→ Physical barrier
→ Skin secretes slightly acidic oils
2. Tears, saliva, stomach acid, and urine
→ Anywhere there is an opening to the external world, there are acidic
conditions that impair bacterial growth
3. Linings
→ The epithelial linings of the respiratory, digestive, and urinary systems act
as a physical barrier
→ Again, these are the places that the outside world can access
Innate Immunity
• Innate immunity is the body’s immediate response to any invaders
• It treats every pathogen the same way (non-specific) and has no memory
• Carried out by white blood cells and plasma proteins
1. Inflammatory Response
Document Summary
Virus nonliving piece of genetic material in a. Virus protein coat that can hijack body cells. Bacteria living cell that can be both good or bad. Bacteria does not take over host cells, simply an. Bacteria respond to antibiotics (destroy cell wall, Antigens indicator on pathogen such as a protein, lipid, or sugar. Infectious will invade and grow in body tissues. Exotoxins protein molecules made by bacteria present in body tissues. Exotoxins a small amount can kill you. Endotoxins lipid portion of a cell wall of a bacteria. Endotoxins cell can release it when it dies. Barriers: can get sick through direct contact (person to person) or indirect contact (person to object) The human body"s first line of defense is a series of chemical and physical barriers: skin. Skin secretes slightly acidic oils: tears, saliva, stomach acid, and urine. Anywhere there is an opening to the external world, there are acidic conditions that impair bacterial growth: linings.