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Microbes

Human Biology

QuestionAnswer
antibodies molecules produced by a B cell in response to an antigen.
antigen a substance or molecule that is recognized by the immune system. The molecule can come from foreign materials such as bacteria or viruses.
B cells small white blood cells crucial to the immune defenses. Also known as B lymphocytes, they come from bone marrow and develop into blood cells called plasma cells, which are the source of antibodies.
cell the smallest unit of life; the basic living unit that makes up tissues.
disease a state in which a function or part of the body is no longer in a healthy condition.
DNA (deoxyribonucleic acid) a complex molecule found in the cell nucleus that contains an organism’s genetic information.
epidemic a disease outbreak that affects many people in a region at the same time.
genes units of genetic material (DNA) that carry the directions a cell uses to perform a specific function.
genomes all of an organism’s genetic material. A genome is organized into specific functional units called genes.
HIV (human immunodeficiency virus) the virus that causes AIDS.
immunity protection from germs.
immunization vaccination or other process that induces protection (immunity) against infection or disease caused by a microbe.
infection a state in which disease-causing microbes have invaded or multiplied in body tissues.
infectious diseases diseases caused by microbes that can be passed to or among humans by several methods.
inflammation an immune system process that stops the progression of disease-causing microbes
microorganisms microscopic organisms, including bacteria, viruses, fungi, plants, and animals.
microscopic too small to be seen with the naked eye.
molecules the smallest physical units of a chemical substance that still keep the chemical properties of that substance; molecules are the building blocks of a cell. Some examples are proteins, fats, carbohydrates, and nucleic acids.
organisms individual living things.
pandemics diseases that affect many people in different regions around the world.
parasites plants or animals that live, grow, and feed on or within another living organism.
pathogens disease-causing organisms.
protein a chain of small chemical compounds called amino acids.
RNA (ribonucleic acid) a complex molecule found in the cell cytoplasm and nucleus. One function of RNA is to direct the building of proteins.
Created by: para12
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