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200 Super Sci Facts
1-25
Question | Answer |
---|---|
The process by which nutrient molecules pass through the walls of the digestive system into the blood. | absorption |
immunity that occurs when a person's own immune system produces antibodies in response to the presence of a pathogen | active immunity |
the movement of materials through a cell membrane using energy | active transport |
a physical dependence on a substance; an intense need by the body | addiction |
the state of development between childhood and adulthood when children become adults physically and mentally | adolescence |
a chemical that gives a quick burst of evergy and causes changes in the body to prepare a person for quick action | adrenaline |
a disease caused by a virus that attacks the immune system | AIDS - Acquired Immunodeficiency Syndrome |
a sbustance that causes an allergy | allergen |
a disorder in which the immune system is overly sensitive to a foreign substance | allergy |
tiny air sacs of lung tissue specialized for the movement of gases between the air and the blood | alveoli |
small organic compounds that are linked together chemically to form large protein molecules; there are 20 common types | amino acids |
a chemical that kills bacteria or slows their growth without harming body cells | antibiotic |
a chemical produced by a B cell of the immune system that destroys a specific kind of pathogen | antibody |
a molecule on a cell that the immune system can recognize either as part of the body or as coming from the outside the body | antigen |
the opening at the end of an organism's digestive through which wastes exit | anus |
the largest artery in the body | aorta |
a blood vessel that carries blood away from the heart | artery |
the reproductive process that involves only one parent and produces offspring that are identical to the parent | asexual reproduction |
a disorder in which the respiratory passages narrow significantly enough to make breathing difficult | asthma |
a condition in which arterial walls thicken as a result of the buildup of fatty materials | atherosclerosis |
an upper chamber of the heart that receives blood from the body | atrium |
the group of nerves that controls involuntary actions such as breathing, heartbeat and digestion | autonomic nervous system |
a threadlike extension of neuron that carries nerve impulses away from the cell body | axon |
a lymphocyte that produces chemicals that help destroy a specific kind of pathogen | B cell |
a substance produced by the liver that breaks up fat particles | Bile |