MCAT MCAT Meaning by word 003

gland that lies in front of the trachea and has two lobes

a substance that causes an allergic reaction

the bones in the head that hold the teeth and help form the facial structure

daily activity cycle in many organisms caused by a 24-hours interval

part of the eye that helps to focus light on the retina

a method of asexual reproduction

substance that is taking part in a chemical reaction

nonrandom mating in which individuals engage in mating having more traits incommon than in random mating

drug which affects the central nervous system and cause people to see or experience unusual things outside the range of normal perception

one-celled organisms that don't have a cell nucleus and reproduce by spore formation or fission

a change in a chromosome or a gene

white blood cell with an immune role found in the lymphatic system

used to detect the end-point during titration

a steroid that plays an important part in metabolism

a double membrane surrounding the lungs; the inner membrane is attached to the lungs; the outer membrane is attached to the thoracic cavity

inability to reproduce

an unproven idea or generalization

the organs of smell

mixture of a weak acid and its salt or of a weak base and its salt

the middle ear

period of life encompassing childhood; adolescence and early adulthood before middle age; boy; young man

protein made by white blood cells, in response to a particular antigen attack, in order to make the antigen harmless

compound made from plants containing carbon, hydrogen and oxygen

valve that controls blood flow between the left atrium and the left ventricle in the heart

the removal of hydrogen from a molecule

any reaction occurring between atoms or compounds can be written with the reactants on the left and the products on the right separated by arrows showing the direction of the reaction

a specific carrier transports molecules through the cell membrane

the breakdown of food to release energy into cells

method of communication

one of the longitudinal contractile elements of a muscle cell occuring in a skeletal or cardiac muscle