PSC 126 Lecture Notes - Lecture 5: Humoral Immunity, Antigen, Extracellular Fluid
Document Summary
Leads to destruction of neurons in the hippocampus (memory) The hippocampus is the brain structure primarily responsible for learning & memory. The hippocampus is highly sensitive & malleable. Cortisol decreases & retracts the dendritic growth in the hippocampal area. From latin immunis meaning exempt or protection. Recognizes foreign substances (viruses, funguses, bacteria, parasites, germs, cancerous cells ) that can cause infection, disease, even death. Lymphatic systems of white blood cells & lymphocytes. Provides general defense against a wide variety of disease threats. Operates through macrophages & natural killer cells. Provides a 1st line defense & a defense against previously unknown threats but is relatively slow. Provides defense against specific disease threats (memory cells) Operates through b cells & t cells. Provides a rapid response to disease threats but must be sensitive to the germ before it can respond. Antigen - foreign substance that triggers a reaction from the immune system. Often found on the surfaces of bacteria & viruses.
