Block1Review - Block 1 Review The Cell 1. Cell Function...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Block 1 Review The Cell - the cell is the fundamental unit of the human body. - Cells contain all the necessary components for life functions - the cell membrane is the outer covering that encircles and protects - cytoplasm is the thick, viscous fluid that fills and gives shape to the cell - organelles are structures that perform specific functions in the cell 1. Cell Function -All human cells have the same general structure and genetic material - differentiation causes cells to become specialized - There are seven major functions of cells: -movement -conductivity -metabolic absorption -secretion -excretion -respiration -reproduction 2. Bodies Defense Mechanisms - Anatomic Barriers : External/Nonspecific- skin and mucous membranes that line the resp, gastrointestinal, and genitourinary tracts - Epithelium - Sebaceous Glands - Sweat, tears, saliva - Mechanical Responses-Respiratory, urinary, gastrointestinal - Inflammatory response : Internal/Nonspecific- attacks invaders by surrounding it with cells and fluids to isolate, destroy, and eliminate - Immune Response : Internal/Specific- specialized response for each invader Antigen - a marker on the surface of a cell that identifies it as self or non-self Antibody - a substance produced by B lymphocytes in response to the presence of a foreign antigen that will combine with and control or destroy the antigen, thus preventing infection. This is known as the immune response Immune Response - the body’s reaction that inactivates or eliminate foreign antigens Memory Cells remember the antigen and will trigger an even faster and more effective response to destroy the same antigen= immunity
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Natural Immunity : in born protection against infection or disease that is part of the person’s genetic makeup Acquired Immunity : protection from infection or disease that is developed (active) or transferred from another (passive) (mother to baby) Phases of Immune Response A. Primary Immune Response- the initial development of antibodies in response to the first exposure to an antigen which the immune system becomes “primed” to produce a faster, stronger response to future exposures B Secondary- the swift, strong response of the immune system to repeated exposures to an antigen Lymphocyte- a type of leukocyte, or white blood cell, that attacks foreign substances as part of the body’s immune system B Lymphocytes - do not attack antigens directly. They produce antibodies (immunoglobulins) that attack antigens. This is called humoral immunity . B lymphocytes travel through a set of lymphoid tissues, including the spleen and lymph nodes. T Lymphocytes - do not produce antibodies, but recognize a foreign antigen and attack it directly. This is called Cell- mediated immunity . Lymphocytes that travel through the thymus are T Lymphocytes. Inflammation Response
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/25/2010 for the course PAR 100 taught by Professor Alan during the Spring '10 term at Miramar College.

Page1 / 10

Block1Review - Block 1 Review The Cell 1. Cell Function...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online