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Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
tuber
Glossaries - Biology glossary

modified underground stem adapted for starch storage; has many adventitious buds

tubular reabsorption
Glossaries - Biology glossary

reclamation of water and solutes that got filtered out in the glomerulus

tubular secretion
Glossaries - Biology glossary

process of secretion of wastes that do not get reabsorbed

tunicate
Glossaries - Biology glossary

sessile chordate that is a member of Urochordata

tympanum
Glossaries - Biology glossary

(also, tympanic membrane or ear drum) thin diaphragm between the outer and middle ears

ubiquinone
Glossaries - Biology glossary

soluble electron transporter in the electron transport chain that connects the first or second complex to the third

ulna
Glossaries - Biology glossary

bone located on the medial aspect (pinky-finger side) of the forearm

ultrasound
Glossaries - Biology glossary

sound frequencies above the human detectable ceiling of approximately 20,000 Hz

umami
Glossaries - Biology glossary

one of the five basic tastes, which is described as “savory” and which may be largely the taste of Lglutamate

unidirectional circulation
Glossaries - Biology glossary

flow of blood in a single circuit; occurs in fish where the blood flows through the gills, then past the organs and the rest of the body, before returning to the heart

unified cell theory
Glossaries - Biology glossary

a biological concept that states that one or more cells comprise all organisms; the cell is the basic unit of life; and new cells arise from existing cells

uniporter
Glossaries - Biology glossary

transporter that carries one specific ion or molecule

uniramous
Glossaries - Biology glossary

referring to one branch per appendage

unsaturated fatty acid
Glossaries - Biology glossary

long-chain hydrocarbon that has one or more double bonds in the hydrocarbon chain.

untranslated region
Glossaries - Biology glossary

segment of the RNA molecule that is not translated into protein. These regions lie before (upstream or 5') and after (downstream or 3') the protein-coding region