The Lymphatic System And Immunity The cells‚ tissues‚ and organs of the lymphatic system play a central role in the body’s defenses against a variety of pathogens‚ or disease-causing organisms. Acts against environment hazards‚ various pathogens‚ and internal threats. Lymphocytes (primary cell) are vital to or overcoming infection and disease. Lymphocytes respond to invading pathogens‚ abnormal body cells‚ and foreign proteins. They act to eliminate these threats or render them harmless
Premium Immune system
GENETICS JARGON Alleles (allelomorphs) Alternative forms of a particular gene. There can be several alleles of a particular gene in the population‚ but only 2 alleles can be inherited by a single individual. For simplicity much literature aimed at the general reader uses "gene" where it means "allele". Allelic Series A series of alleles that are all mutant forms of the same gene and are at the same locus (same position on the chromsome). Alternate Heredity Mendelian inheritance involving
Free Allele Genetics Gene
44 Multiple-Choice & True/False Questions The multiple-choice & true/false questions are worth 1 point each. 1. A child’s cohort would include their A) neighbors B) immediate family C) parents D) classmates * (Logic: cohort =a group/follower) 2. Experiments allow researchers to: A) reflect the natural environment B) study the entire complexity and uniqueness of an individual * C) inexpensively follow the scientific method D) determine cause-and-effect 3. The greatest
Premium Jean Piaget Pregnancy Object-oriented programming
of sperm cells corpus spongiosum (lower – surrounds urethra) passes along ventral side of penis and encloses urethra 2 coropora cavernosum on dorsal side 2 in cross section: seminiferous tubules appear roughly circular and contain germinal epithelium (containing germ cells) and sustentacular (Sertoli) cells (upper) Sertoli cells protect germ cells and promote their development all contain numerous tiny blood sinuses = lacunae b. interstitial cells scrotum keeps testes
Premium Reproductive system Meiosis
DIOCESAN BOYS’ SCHOOL IB HISTORY The Days of the French Revolution by Christopher Hibbert Fung Kei Lap Michael 11L 11/13/2012 Bibliography: Hibbert‚ Christopher. The Days of the French Revolution. New York: HarperCollins‚ 2002. Auntieruth. “Alive with Colorful Characters.” Review of The Days of the French Revolution‚ by Christopher Hibbert. Epinions‚ asdJanuary 29‚ 2008. asdhttp://www.epinions.com/review/The_Days_of_the_French_Revolution_by_Christopher_Hibbert/content_416395071108 Goodreads
Free Louis XVI of France French Revolution Reign of Terror
Human development Principles of Growth and Development • Growth – increase in size or quantity over time • Development – systematic and orderly change organisms experience as they live and either gain or lose abilities Principles of Growth and Development Growth is personal Growth comes from within Growth is gradual and orderly but uneven Growth has certain characteristics common at particular stages • Development precedes from the head downward (cephalocaudal) • Development precedes from the
Premium Jean Piaget Developmental psychology Theory of cognitive development
Stability vs. Change‚ Continuity vs. Stage Research Methods: 1.Longitudinal Method: Study one group of people over long period of time 2.Cross-Sectional Method: Study different age groups at the same time Prenatal Development Three Stages: 1.Germinal Stage: Zygote -Conception to 2 weeks 2.Embryonic Stage -2 weeks to 2 months 3.Fetal Stage -2 months to birth Prenatal Nutrition: Teratogens Motor Development *Cephalocaudal - Development from head to foot *Proximodistal -Development from
Premium Jean Piaget Psychology Sigmund Freud
| Radiation Safety | UML-Radiation and Life Sec 031 | | Ryan M. Burnett | 3/11/2013 | | Radiological protection deals with methods and efforts of safeguarding people and the surroundings from the deadly effects of ionizing radiation that includes electromagnetic radiation and particle radiation. Sometimes radiation cannot be controlled or contained and accidents take place causing radiation leaks. For this reason‚ protocols and radiation safety has become a pre-curser in our
Premium Ultraviolet Ionizing radiation Cancer
• Infection: Tuberculosis Tuberculosis (TB) is commonly caused by a strain of bacterium called Mycobacterium Tuberculosis. It is neither gram-positive nor gram-negative‚ but instead has a waxy coating on the outside of the cell that enables acid-fast techniques to be used when staining the bug. The bacterium was first discovered by Robert Koch and earned him a Nobel Prize in Medicine. Mycobacterium prevents the acidification of the phagolysosome‚ thus disabling the antigen from being presented
Premium Immune system T helper cell Bone marrow
which filter toxins and attack disease organisms. Lymph nodules and lymph nodes filter lymph Arrangement of fibers into irregular trabeculae in lymph nodes forces the fluid to “percolate” through and encounter a large SA of lymphoid tissue. Germinal centers in the outer cortex contain many lymphocytes. Lymph nodes also consolidate vessels as there are fewer (and larger efferent vessels) leaving the lymph node than afferent vessels entering
Premium Immune system Antibody Lymphatic system