IMMUNE SYSTEM
, IMMUNITY
• Immunity is the balanced state of multicellular organis
having adequate biological defenses
fight infection, disease, or other unwanted biolog
invasion, while having adequate tolerance to avoid alle
and autoimmune diseases.
• Immunity is the capability of multicellular organisms
resist harmful microorganisms from entering it.
, DEFINITIONS COMMONLY USED IN IMMUNOLOGY
• An antigen (Ag) is defined as a substance, usually protein in nature, whi
when introduced into the tissues stimulates antibody production.
• Hapten is a non-protein substance which has no antigenic properties, b
on combining with a protein can form a new antigen capable of formi
antibodies.
• An antibody (Ab) is a protein substance produced as a result of antigen
stimulation. Circulating antibodies are immunoglobulins.
, TYPES OF IMMUNITY.
• Natural or innate immunity is non-specific and is considered
the first line of defense without antigenic specificity.
It has 2 major components:
a) Humoral: comprised by complement.
b) Cellular: consists of neutrophils, macrophages, and natu
killer (NK) cells.
, IMMUNITY
• Immunity is the balanced state of multicellular organis
having adequate biological defenses
fight infection, disease, or other unwanted biolog
invasion, while having adequate tolerance to avoid alle
and autoimmune diseases.
• Immunity is the capability of multicellular organisms
resist harmful microorganisms from entering it.
, DEFINITIONS COMMONLY USED IN IMMUNOLOGY
• An antigen (Ag) is defined as a substance, usually protein in nature, whi
when introduced into the tissues stimulates antibody production.
• Hapten is a non-protein substance which has no antigenic properties, b
on combining with a protein can form a new antigen capable of formi
antibodies.
• An antibody (Ab) is a protein substance produced as a result of antigen
stimulation. Circulating antibodies are immunoglobulins.
, TYPES OF IMMUNITY.
• Natural or innate immunity is non-specific and is considered
the first line of defense without antigenic specificity.
It has 2 major components:
a) Humoral: comprised by complement.
b) Cellular: consists of neutrophils, macrophages, and natu
killer (NK) cells.
