Unit 3 Word List Flashcards
Acetylcholine
Chemical signaling molecule
Acetylcholinesterase
Enzyme that breaks down acetylcholine
Acid
Chemical that gives off hydrogen ions
Adenine
Molecule found in DNA and RNA, pairs with thymine (DNA) or uracil (RNA)
Adipocyte
Fat cell
Aerobic
Activity that occurs when oxygen is plentiful
Allele
Unit of inheritance
Amphipathic
A molecule that partially prefers water and partially repels water
Anabolic
Chemical process that makes larger chemicals out of smaller ones
Anaerobic
Activity that occurs when oxygen is scarce
Anaphase
Stage of cell division where chromosomes are separating
Antibody
Protein that defends the body against invaders
Anti parallel
Parallel but running in opposite directions like a two lane road
Antiport
Transport process that involves molecules moving in opposite directions; exchange
Apical
Toward the top
Apocrine
Cellular secretion that involves breaking off a piece of the cell
Apoptosis
Programmed or preplanned cell death
Astrocyte
Star-shaped cell of the brain; a type of glial cell
Astroglia
Star shaped cell of the brain, a type of glial cell (same as astrocyte)
Autosome
Chromosome that is not involved in sex determination
Avascular
Without blood vessels
Basal
Toward the bottom
Base pair
Adenine-thymine or cytosine-guanine pairs that form the “rungs” of the twisted ladder structure of DNA
Bilayer
Two layered covering
Blastocyst
Stage of human embryo where it is a hollow ball of rapidly dividing cells
Carbohydrate
Molecule consisting of equal parts carbon and water
Catabolic
Chemical process that makes smaller chemicals out of larger ones
Catalyze
Speed up a chemical reaction
Centriole
Organelle that acts as a microtubule organizing center
Centromere
Part of a chromosome in the center where two DNA molecules touch
Cholesterol
Important lipid, essential for cell processes
Chondrocyte
Cartilage cell
Chromatine
DNA plus RNA plus associated proteins, visible when cells are dyed and viewed through the microscope
Chromosome
Chromatin visible through microscope in Xshaped packages