Free MCAT Words # MCAT/M105

n. equilibrium
(a) globular parts of a protein separated by more diffuse areas of the polypeptide chain
(b) nodule of lymph tissue at the back of the throat that enlarges to help fend off infections
(c) a situation where action must be taken straight away
(d) state of a body or physical system at rest
 
n. polysaccharide
(a) someone who specializes in genetics; the study of genes and heredity
(b) carbohydrate containing many sugar units
(c) color
(d) muscle on the upper arm that moves the elbow
 
n. platelet
(a) metallic element with a high atomic number (83) used to make alloys
(b) thrombocyte; cytoplasmic body with the function to promote blood clotting
(c) a group of cells with the same shape and function
(d) the energy needed to start a chemical reaction
 
n. face
(a) monthly cycle in the female reproductive system
(b) movement of gases from an area of high concentration to an area of low concentration
(c) a junction between two nerve endings
(d) front of the head including forehead, cheeks, eyes, nose and chin
 
n. lacrimal gland
(a) nodule of lymph tissue at the back of the throat that enlarges to help fend off infections
(b) a sequence of amino acids; food needed for growth and repair
(c) organism that depends on autotrophs for their food and energy
(d) gland that makes tears

n. membrane potential
(a) the attractive force that connects atoms together as a molecule or ions as a crystal
(b) molecule differing only in the spatial arrangement around a single carbon atom
(c) organ in the thorax involved in T-cell immune function
(d) the difference in potential between the inside and the outside of a cell
 
n. vasectomy
(a) all the channels that carry urine
(b) stituation created when microbes enter the body and cause a disease
(c) abdominal organ where a baby develops before birth; the womb
(d) operation where the vas deferens are cut leading to sterility
 
n. lumen
(a) internal diameter of blood vessels; hole
(b) a combination of reacting particles (atoms; molecules or ions) when they are at the top of the activation energy barrier between the products and the reactants
(c) all the channels that carry urine
(d) microbe that causes decay
 
n. tympanic membrane
(a) muscle on the upper arm that moves the elbow
(b) muscle separating abdomen from thorax
(c) the eardrum
(d) double-layered smooth membrane that covers certain cavities in an organism
 
n. zinc
(a) system that controls daily cycles such as blood pressure, sleep rhythms and hormone release; body clock
(b) achromatic filaments forming a spindle during cell division
(c) a metal showing few properties of the transition metals
(d) compound made from plants containing carbon, hydrogen and oxygen