Muscle in the middle abdomen that contracts and expands to inflate and deflate the lungs.
What is the diaphragm.
100
The maintaining of steady, life-sustaining conditions inside an organism despite changes in the environment.
What is homeostasis.
100
Chemical messangers produced in endocrine glands.
What are hormones?
100
A disease causing microorganism.
What is a pathogen?
100
The number of protons in an element.
What is the atomic number?
200
Two short tubes at the lower end of the trachea.
What are bronchi.
200
The brain and spinal cord.
What is the central nervous system.
200
Hollow pear-shaped organ with thick walls in which a fertilized egg develops.
What is the uterus.
200
The type of immunity that occurs when the body makes its own antibodies against pathogens.
What is active immunity?
200
A group of atoms that are chemically bonded together.
What is a compound?
300
The tube that leads from the bladder to the outside of the body.
What is the urethra.
300
Fluid filled structure in the inner ear that helps maintain balance and corrdination.
What is cochlea.
300
Thin membrane that forms around the embryo during the third week of pregnancy.
What is the amniotic sac?
300
Diseases caused by pathogens.
What are infectious diseases?
300
The number of protons plus the number of neutrons.
What is the mass number?
400
Kidney
What are two bean shaped organs that filter excess water and other wastes out of the blood; main organs of the urinary system.
400
Cerebellum
What is the part of the brain responsible for balance and cordination.
400
Identical twins.
What are the type of twins that result from the union of one sperm with one egg?
400
Type II diabetes.
What is the type of diabetes that occurs later in life when the body stops responding to insulin produciton; usually related to poor diet and sedintary lifestyle.
400
Isotope.
What are two or more forms of the same element with differing numbers of neutrons.
500
The functional units of the kidneys
What are nephrons.
500
Retina.
What is the tissue on the back of the eye that is sensitive to light energy.
500
The fertilized egg.
What is a zygote.
500
Biological vector.
What is an animal such as a mosquito or a rat that carries a pathogen and spreads it to humans?
500
Atomic number.
What is the weighted average of all the isotopes of a given element?