TEAS TEST TERMS 2026 | UPDATED STUDY
GUIDE WITH KEY DEFINITIONS, PRACTICE
QUESTIONS, AND RATIONALES
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,adrenal A gland above the kidney that produces hormones to regulate heart rate, blood
pressure, and other functions
adverb Word or phrase that describes or modifies an adjective, verb, or other adverb
affix Letters placed at the beginning or end of a word or word part to modify its
meaning
algebraic equation A mathematical sentence that includes one or more variables
allele A specific copy of a gene
allergies An immune response to a foreign agent that is not a pathogen
alveoli Tiny air sacs in the lungs where exchange of oxygen and carbon dioxide takes
place
amino acids The monomers that make up proteins
anaphase The stage in mitosis in which the chromosomes are pulled apart to the poles and
cell division begins
anaphase I The stage in meiosis I in which homologous chromosomes move to opposite ends
of the cell
anaphase II The stage in meiosis II in which sister chromatids separate and move to opposite
ends of the cell
anatomical position Standard positioning of the body as standing; feet together; arms to the side; with
head, eyes, and palms of hands forward
anecdote A short story that illustrates a concept or point and creates a connection between
the author and reader
anion A negatively charged ion
antagonist The relaxed muscle in the pair of muscles that is involved in a given movement
antibody A blood protein that counteracts a specific antigen
antidiuretic hormone A secretion from the pituitary gland that increases the amount of water able to be
reabsorbed from a collecting duct
, antigen-presenting cell A cell that displays foreign antigens with major histocompatibility complexes on
their surfaces
antigens Substances on the surfaces of agents that act to identify them, to the body, as
being native or foreign
compact (dense) bone Bone containing densely packed osteons that make up the peripheral layer of
bone
complement Sentence part that gives more information about a subject or object
complementary strand A molecule of RNA (or a strand of DNA) synthesized from a complementary
template strand
compound A substance made of two or more elements
comprehension Ability to understand
concentration of a solution The quantity of solute in a given quantity of solution
conclusion A deduction made by a reader that takes the details, evidence, and assumptions
presented in a text to the next logical step
conjunction A connecting word
connotation An implied meaning of a word or idea created by the emotions and assumptions
attached to it
constant of proportionality The constant ratio between two quantities
context Surrounding words or ideas within a sentence or passage that affect the meaning
of a word and influence how it is understood
contraction The process leading to shortening and/or development of tension in a muscle
contradiction A statement, assertion, or instruction in a text that conflicts with information
provided elsewhere in the same text
controlled variable The condition that is kept the same in an experiment
conversion factor The number used to multiply or divide to convert from one value to another
correlation The way two variables change together, also known as covariation
GUIDE WITH KEY DEFINITIONS, PRACTICE
QUESTIONS, AND RATIONALES
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,adrenal A gland above the kidney that produces hormones to regulate heart rate, blood
pressure, and other functions
adverb Word or phrase that describes or modifies an adjective, verb, or other adverb
affix Letters placed at the beginning or end of a word or word part to modify its
meaning
algebraic equation A mathematical sentence that includes one or more variables
allele A specific copy of a gene
allergies An immune response to a foreign agent that is not a pathogen
alveoli Tiny air sacs in the lungs where exchange of oxygen and carbon dioxide takes
place
amino acids The monomers that make up proteins
anaphase The stage in mitosis in which the chromosomes are pulled apart to the poles and
cell division begins
anaphase I The stage in meiosis I in which homologous chromosomes move to opposite ends
of the cell
anaphase II The stage in meiosis II in which sister chromatids separate and move to opposite
ends of the cell
anatomical position Standard positioning of the body as standing; feet together; arms to the side; with
head, eyes, and palms of hands forward
anecdote A short story that illustrates a concept or point and creates a connection between
the author and reader
anion A negatively charged ion
antagonist The relaxed muscle in the pair of muscles that is involved in a given movement
antibody A blood protein that counteracts a specific antigen
antidiuretic hormone A secretion from the pituitary gland that increases the amount of water able to be
reabsorbed from a collecting duct
, antigen-presenting cell A cell that displays foreign antigens with major histocompatibility complexes on
their surfaces
antigens Substances on the surfaces of agents that act to identify them, to the body, as
being native or foreign
compact (dense) bone Bone containing densely packed osteons that make up the peripheral layer of
bone
complement Sentence part that gives more information about a subject or object
complementary strand A molecule of RNA (or a strand of DNA) synthesized from a complementary
template strand
compound A substance made of two or more elements
comprehension Ability to understand
concentration of a solution The quantity of solute in a given quantity of solution
conclusion A deduction made by a reader that takes the details, evidence, and assumptions
presented in a text to the next logical step
conjunction A connecting word
connotation An implied meaning of a word or idea created by the emotions and assumptions
attached to it
constant of proportionality The constant ratio between two quantities
context Surrounding words or ideas within a sentence or passage that affect the meaning
of a word and influence how it is understood
contraction The process leading to shortening and/or development of tension in a muscle
contradiction A statement, assertion, or instruction in a text that conflicts with information
provided elsewhere in the same text
controlled variable The condition that is kept the same in an experiment
conversion factor The number used to multiply or divide to convert from one value to another
correlation The way two variables change together, also known as covariation
