Chapter 2 (page 9) Flashcards
It is the bodies defense mechanism against invading micro-organisms.
Immune system
What composed the Immune system?
Cells and Molecules
There are two types of immunity:
A) Non-specific immunity
B) Specific immunity
_________________ is the general protection that our bodies provide us with to protect us from harmful toxins and chemicals.
Non-specific immunity
What are examples of non-specific immunity?
the skin
mucous membranes
tears
phagocytosis of bacteria by WBC.
It is known as the first line of defense against the invasion of disease causing micro-organisms:
Skin
______________ that is a formidable physical barrier. __________ is resistant to most micro-organisms, weak acids and bases, bacteria and toxins. The acidity of skin
secretions also inhibits bacterial growth.
Keratinized epithelial membrane
Keratin
__________________ line all body cavities that open to the exterior. These membranes serve as physical barriers. The sticky mucous traps many micro-organisms that enter digestive and
respiratory passageways. The stomach mucosa secretes HCI acid, which can kill pathogens.
Mucous mambrane
___________ cleans oral cavity and teeth. ____________ (in eye) contains lysosomes, which destroy
bacteria.
Saliva
Lacrimal fluid
____________ kills cellular debris and micro-organism by ingesting them.
Phagocytes
What are the types of non-specific immunity?
The skin Mucous membranes Saliva Phagocytes Natural killer cells Antimicrobial chemicals Fever
It is known as chief Phagocytes:
Macrophages
Three types of Phagocytes:
Macrophages
Neutrophils
Eosinophils
Macrophages is the Chief phagocytes. They derive from circulating WBC called _____________.
monocytes
Monocytes leave the bloodstream and enter the tissues. They enlarge and develop into ______________ .
macrophages
